Double-striped Bluet
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Double-striped Bluet
The double-striped bluet (''Enallagma basidens'') is a species of damselfly in the family Coenagrionidae. This species grows to lengths 21–28 mm. Its common name from the peculiar black shoulder stripe, which is divided in two by a thin blue stripe. This is the key identification characteristic; no other damselfly has a shoulder stripe that looks like this one. Mature males have an abdomen that alternates black and blue. The final segment of the abdomen is blue below and black above, while segments 8 and 9 are all blue. Females and immatures are tan to olive or brown, but like the mature males they have the divided shoulder stripe. These damselflies are most typically found alongside lakes and ponds, but are occasionally found next to slow-moving streams, too. Distribution *Mexico: Tamaulipas, San Luis Potosí, Nuevo León, Coahuila, Chihuahua, Baja California *United States: (Alabama • Arkansas • Arizona • California • Colorado • Delaware • Florida • Geo ...
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Philip Powell Calvert
Philip Powell Calvert (January 29, 1871, in Philadelphia, PennsylvaniaCALVERT. Philip Powell
in '''' (1926 edition); p. 405
– August 23, 1961) was an American , recognised as a leading authority on the (dragonfly order). A long-term teacher and at the

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Indiana
Indiana ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Michigan to the northwest, Michigan to the north and northeast, Ohio to the east, the Ohio River and Kentucky to the south and southeast, and the Wabash River and Illinois to the west. Nicknamed "the Hoosier State", Indiana is the List of U.S. states and territories by area, 38th-largest by area and the List of U.S. states and territories by population, 17th-most populous of the List of states and territories of the United States, 50 states. Its capital and largest city is Indianapolis. Indiana was admitted to the Union as the 19th state on December 11, 1816. Indigenous peoples of the Americas, Indigenous resistance to American settlement was broken with defeat of the Tecumseh's confederacy in 1813. The new settlers were primarily Americans of British people, British ancestry from the East Coast of the United States, eastern seaboard and the Upland South ...
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Pennsylvania
Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions of the United States. It borders Delaware to its southeast, Maryland to its south, West Virginia to its southwest, Ohio and the Ohio River to its west, Lake Erie and New York (state), New York to its north, the Delaware River and New Jersey to its east, and the Provinces and territories of Canada, Canadian province of Ontario to its northwest via Lake Erie. Pennsylvania's most populous city is Philadelphia. Pennsylvania was founded in 1681 through a royal land grant to William Penn, the son of William Penn (Royal Navy officer), the state's namesake. Before that, between 1638 and 1655, a southeast portion of the state was part of New Sweden, a Swedish Empire, Swedish colony. Established as a haven for religious and political tolerance, the B ...
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Ohio
Ohio ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the west, and Michigan to the northwest. Of the 50 List of states and territories of the United States, U.S. states, it is the List of U.S. states and territories by area, 34th-largest by area. With a population of nearly 11.9 million, Ohio is the List of U.S. states and territories by population, seventh-most populous and List of U.S. states and territories by population density, tenth-most densely populated state. Its List of capitals in the United States, capital and List of cities in Ohio, most populous city is Columbus, Ohio, Columbus, with the two other major Metropolitan statistical area, metropolitan centers being Cleveland and Cincinnati, alongside Dayton, Ohio, Dayton, Akron, Ohio, Akron, and Toledo, Ohio, Toledo. Ohio is nicknamed th ...
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New Mexico
New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also borders the state of Texas to the east and southeast, Oklahoma to the northeast, and shares Mexico-United States border, an international border with the Mexican states of Chihuahua (state), Chihuahua and Sonora to the south. New Mexico's largest city is Albuquerque, and its List of capitals in the United States, state capital is Santa Fe, New Mexico, Santa Fe, the oldest state capital in the U.S., founded in 1610 as the government seat of Santa Fe de Nuevo México, Nuevo México in New Spain. It also has the highest elevation of any state capital, at . New Mexico is the List of U.S. states and territories by area, fifth-largest of the fifty states by area, but with just over 2.1 million residents, ranks List of U.S. states and terri ...
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New Jersey
New Jersey is a U.S. state, state located in both the Mid-Atlantic States, Mid-Atlantic and Northeastern United States, Northeastern regions of the United States. Located at the geographic hub of the urban area, heavily urbanized Northeast megalopolis, it is bordered to the northwest, north, and northeast by New York (state), New York State; on its east, southeast, and south by the Atlantic Ocean; on its west by the Delaware River and Pennsylvania; and on its southwest by Delaware Bay and Delaware. At , New Jersey is the List of U.S. states and territories by area, fifth-smallest state in land area. According to a 2024 United States Census Bureau, U.S. Census Bureau estimate, it is the List of U.S. states and territories by population, 11th-most populous state, with over 9.5 million residents, its highest estimated count ever. The state capital is Trenton, New Jersey, Trenton, and the state's most populous city is Newark, New Jersey, Newark. New Jersey is the only U.S. stat ...
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North Carolina
North Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, South Carolina to the south, Georgia (U.S. state), Georgia to the southwest, and Tennessee to the west. The state is the List of U.S. states and territories by area, 28th-largest and List of U.S. states and territories by population, 9th-most populous of the List of states and territories of the United States, United States. Along with South Carolina, it makes up the Carolinas region of the East Coast of the United States, East Coast. At the 2020 United States census, 2020 census, the state had a population of 10,439,388. Raleigh, North Carolina, Raleigh is the state's List of capitals in the United States, capital and Charlotte, North Carolina, Charlotte is its List of municipalities in North Carolina, most populous and one of the fastest growing cities in the United States. The Charl ...
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Nebraska
Nebraska ( ) is a landlocked U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the southwest; and Wyoming to the west. Nebraska is the List of U.S. states and territories by area, 16th-largest state by land area, with just over . With a population of over 2 million as of 2024, it is the List of U.S. states and territories by population, 38th-most populous state and the List of states and territories of the United States by population density, eighth-least densely populated. Its List of capitals in the United States, capital is Lincoln, Nebraska, Lincoln, and its List of municipalities in Nebraska, most populous city is Omaha, Nebraska, Omaha, which is on the Missouri River. Nebraska was admitted into the United States in 1867, two years after the end of the American Civil War. The Nebras ...
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Mississippi
Mississippi ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South regions of the United States. It borders Tennessee to the north, Alabama to the east, the Gulf of Mexico to the south, Louisiana to the southwest, and Arkansas to the northwest. Mississippi's western boundary is largely defined by the Mississippi River, or its historical course. Mississippi is the List of U.S. states and territories by area, 32nd largest by area and List of U.S. states by population, 35th-most populous of the 50 U.S. states and has the lowest per-capita income. Jackson, Mississippi, Jackson is both the state's List of capitals in the United States, capital and largest city. Jackson metropolitan area, Mississippi, Greater Jackson is the state's most populous Metropolitan statistical area, metropolitan area, with a population of 591,978 2020 United States census, in 2020. Other major cities include Gulfport, Mississippi, Gulfport, Southaven, Mississippi, South ...
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Missouri
Missouri (''see #Etymology and pronunciation, pronunciation'') is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Ranking List of U.S. states and territories by area, 21st in land area, it borders Iowa to the north, Illinois, Kentucky and Tennessee to the east, Arkansas to the south and Oklahoma, Kansas, and Nebraska to the west. In the south are the Ozarks, a forested highland, providing timber, minerals, and recreation. At 1.5 billion years old, the St. Francois Mountains are among the oldest in the world. The Missouri River, after which the state is named, flows through the center and into the Mississippi River, which makes up the eastern border. With over six million residents, it is the List of U.S. states and territories by population, 19th-most populous state of the country. The largest urban areas are St. Louis, Kansas City, Missouri, Kansas City, Springfield, Missouri, Springfield, and Columbia, Missouri, Columbia. The Cap ...
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Michigan
Michigan ( ) is a peninsular U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest, Upper Midwestern United States. It shares water and land boundaries with Minnesota to the northwest, Wisconsin to the west, Indiana and Illinois to the southwest, Ohio to the southeast, and the Canadian Provinces and territories of Canada, province of Ontario to the east, northeast and north. With a population of 10.14 million and an area of , Michigan is the List of U.S. states and territories by population, 10th-largest state by population, the List of U.S. states and territories by area, 11th-largest by area, and the largest by total area east of the Mississippi River.''i.e.'', including water that is part of state territory. Georgia (U.S. state), Georgia is the largest state by land area alone east of the Mississippi and Michigan the second-largest. The state capital is Lansing, Michigan, Lansing, while its most populous city is Detroit. The Metro Detroit r ...
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Maryland
Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east, as well as with the Atlantic Ocean to its east, and the national capital and federal district of Washington, D.C. to the southwest. With a total area of , Maryland is the List of U.S. states and territories by area, ninth-smallest state by land area, and its population of 6,177,224 ranks it the List of U.S. states and territories by population, 18th-most populous state and the List of states and territories of the United States by population density, fifth-most densely populated. Maryland's capital city is Annapolis, Maryland, Annapolis, and the state's most populous city is Baltimore. Maryland's coastline was first explored by Europeans in the 16th century. Prior to that, it was inhabited by several Native Americans in the United States ...
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