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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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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 |