European Species of the Genus Cosmopteryx. 643 



narrower. Thorax and upper part of the head dark brown, with 

 very fine silvery lines. Face ratlier metallic grey. Palpi silvery- 

 grey. Antennse as in Druryella. Legs not so sharply spotted 

 with white. Anterior wings only yellowish-brown, but very dark. 

 The base not brassy, but of the ground colour ; a very shining, 

 slender, plumbeous line runs from the base along the costa, which, 

 however, it soon quits ; it is half as long as the distance between 

 the base and the medial fascia ; beneath its apex Lies a similar, 

 but much shorter, line, just above the fold, and beneath the latter, 

 parallel to it, is a second. The medial fascia is less contracted 

 towards the costa ; its anterior margin has a deep black spot in 

 the shining golden border ; on its hinder margin the border is 

 formed by two shining, golden, opposite spots, which come very 

 close together, and are internally margined with black; the costal 

 spot is whitish on the cilia. Between these spots in the middle 

 of the wing is an orange-coloured prolongation (which is altogether 

 wanting in Druryella), which is continued to the shining, silvery, 

 longitudinal line. On the underside of the anterior wings there is 

 a very faint whitish blotch in the costal cilia. The specimen 

 described is a male, and was taken, with several others, in the 

 Prater, at Vienna. Cosmopteryx Lienigiella, Z. (' Isis,' 1846, 

 p. 298), is more nearly allied to this species than to Druryella" 



In 1854 appeared my volume of the " Insecta Britannica :" in 

 this I described our common black species under the Fabrician 

 name of Drurella, quoting as synonyms the Druryella of Zeller, 

 the Zieglerella of Hiibner, and the Eximia of Haworth and 

 Stephens, as, up to that time, no one apparently had suspected the 

 existence of two black species. My description (p. 229) was as 

 follows : — 



" Alis anticis atr'is, fascia obliqua argentea prope basim, fascia 

 recta in medio, fasciaque posteriore obliqua violaceo-argenteis, 

 spatium triangulare saturate aurantium includentibus, strigulis 

 duabus argenteis, altera supra angulum analem, altera in ipso 

 apice. 

 " Exp. al. 4 lin. 



" Head dark fuscous, metallic. Face and palpi rather silvery. 

 Antennse black, with a ring before the apex, and the apex white. 

 Anterior wings black, with an oblique silvery fascia near the base 

 (nearest the base on the costa), a nearly straight fascia in the 

 middle, and an oblique fascia beyond the middle, silvery violet 

 (this last fascia is nearest the base on the inner margin) ; the 



