|
Arroyo Bluet
The arroyo bluet (''Enallagma praevarum'') is a damselfly of the family Coenagrionidae, native to the western United States, south to southern Mexico. It is associated with slow-flowing streams or lake margins with emergent vegetation. Anatomy and morphology Male Males have blue eyes, accompanied by oval, raindrop shaped turquoise spots above each eye. Their abdomen is blue with large black rectangular spots lining the top, ending in an abdomen tip of the same color set. Female Females possess the same build as males, but can also be found in tan or lighter blue shades rather than turquoise. Their legs are a lighter brown color (as opposed to black), and the spots above their eyes are usually larger than their male counterparts. Distribution and habitat Distribution Arroyo Bluets occupy both the west coast of Southern California and the region of sagebrush along the northeastern California border. The elevations The elevation of a geographic ''location'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Hermann August Hagen
Hermann August Hagen (30 May 1817 – 9 November 1893) was a German entomologist who specialised in Neuroptera and Odonata. He had established himself as one of Europe's preeminent entomologists by 1867 when he accepted a position at Harvard University to curate the Museum of Comparative Zoology. In 1870 he became the first entomologist in the United States to hold the formal title, Professor of Entomology. Biography Hagen was born 30 May 1817 in Königsberg, Prussia. He was the son of Anna (Linck) Hagen and Carl Heinrich Hagen. His father was a senior government counselor and a professor of political science at the University of Königsberg and his grandfather, Karl Gottfried Hagen, was a professor of chemistry at the same university.Henshaw (1894) Young Hagen graduated from a gymnasium in 1836 and began to study medicine at the University of Königsberg. His course of studies was greatly influenced by his zoology professor, Martin Heinrich Rathke and together they toured m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |