European Species of the Genus Cosmopteryx. 641 



wing, and then to the end of the cilia ; the costal cih'a are white, 

 otherwise the cilia are yellowish-grey. 



" The grey posterior wings are even more slender than in 

 Pedella. 



" The underside is shining grey ; the margins of the anterior 

 wings are narrowly whitish (the costa at least from the middle), 

 and these streaks become gradually broader, so that the apex of 

 the wing is only intersected by a grey longitudinal streak." 



This beautiful insect, so accurately described from a single speci- 

 men, was soon afterwards met with in our Cambridgeshire fens ; 

 and in the "Zoologist" of 1850, p. 2753, 1 remarked that " two 

 specimens " were " in Mr. H. Doubleday's collection, taken at 

 \axley in June," and quoted there the Zellerian description. 



In the year 1850, Zeller described, in the Stettin " Entomo- 

 Ingische Zeitung," p. 196, the insect for which, in the " Isis " of 

 1839, he had adopted the Hiibnerian name of Zieglerella ; he now 

 assigned to it the older Fabrician name of Drurella, altering, how- 

 ever, the spelling to Druryella. This description, by far the most 

 elaborate which had, up to that time, been given of any of the 

 black species, was as follows : — 



" Alis anticis atris, basi orichalcea, fascia media aurantiaca 

 aurato-marginata, linea apicis caerulescenti argentea," 



" This insect, decked with the most splendid colours, is very 

 insufficiently represented by Hiibner ; his figure represents the 

 wings much too broad, with the cilia too short, with a grey base 

 to the anterior wings, with no metallic line in the apex of the 

 wing, and with no shining golden border to the dark red fascia. 

 Fabricius incorrectly styles the fascia golden and its border silvery; 

 the "basis alarum fusco-argentea" shows that he meant the present 

 species, and not Scrihdiella. Head and thorax entirely metallic, 

 dark bronze-coloured; antennae thin and long, serrated towards 

 the apex, with a long basal joint, thickened towards its apex ; 

 the antennae are shining black, with the basal joint whitish be- 

 neath ; the tips are white, and a little before the white tips are two 

 white rings, first a broader one and then one more slender. Palpi 

 long, thin, recurved, brownish-yellow, metallic ; the second joint 

 rather thickened at the apex ; the terminal joint, which is more 

 than half the length of the palpi, is finely pointed. Legs shining 

 brown ; posterior tibiae externally spotted with silver ; all the joints 

 of the tarsi with their tips shining silver. Abdomen brown-grey, 

 with the anal flap of the male grey, the belly whitish, with silvery 



