Geranium Argus
''Eumedonia eumedon'', the geranium argus, is a butterfly of the family Lycaenidae. It is found in the Palearctic realm. This butterfly has been included in the genera ''Plebejus'', ''Plebejus, Plebeius'', ''Polyommatus'' and ''Aricia (butterfly), Aricia'', but recent molecular studies have demonstrated that ''Eumedonia'' is a valid genus, different from the previous genera mentioned. The wingspan is 26–30 mm. The butterfly flies from May to August depending on the location. The larvae feed on Geraniaceae species (genera ''Geranium'' and ''Erodium''). Description from Seitz L. eumedon Esp. (= chiron Rott.) (80 a). Above dark brown with white fringes and dark discocellular spot to the forewing; the female has small red anal submarginal spots on the hindwing, sometimes also on the forewing. Beneath brown, with red-yellow distal band, which is either continuous, or separated into spots, and either restricted to the hindwing or continued on to the forewing, or may be entire ...
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Eugen Johann Christoph Esper
Eugenius Johann Christoph Esper (2 June 1742 – 27 July 1810) was a German zoologist and naturalist. Born in Wunsiedel in Bavaria, he was professor of zoology at Erlangen university. Life and work Eugen and his brother Friedrich were introduced to natural history at an early age by their father Friedrich Lorenz Esper, an amateur botanist. Encouraged to abandon his theology course by his professor of botany Casimir Christoph Schmidel (1718–1792) Eugen Esper, instead, took instruction in natural history. He obtained his doctorate of philosophy at the university of Erlangen in 1781 with a thesis entitled ''De varietatibus specierum in naturale productis''. The following year, he started to teach at the university initially as extraordinary professor, a poorly paid position, then in 1797 as the professor of philosophy. He directed the department of natural history in Erlangen from 1805. Thanks to him the university collections of minerals, birds, plants, shells and ...
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