British Species of the Genus Micropteryx. 37 



Zetterstedt has an Adela cicalricella (Ins. Lapp. 1008, 13), 

 which may perhaps be this species. He says, " alis anticis aureo- 

 violaceoque irroratis, posticis pnrpurascenti griseis ? ." " Ad. 

 Calthella nonnihil major. Alee anticae laeves, nee striatim impressae 

 anreo-pallido-cupreoque undique, crebre irroratae, fimbria grisea; 

 posticae purpureo-micantes. Tin. Sparmannella, Thunb. et Fab., 

 huic similis, sed ilia est fere duplo major et alis anticis aureis 

 punctis striguliformibus transversis undique adspersis, a nostra 

 certe distincta." This would all appear to point out our purpurella, 

 except the size ; but he distinctly says hardly larger than Calthella, 

 and little more than half the size of Sparmannella, — now our insect 

 is as large as Sparmannella and nearly twice the size of Calthella. 



Zeller' s fastuosella (Isis, 1839, p. 185) must also come very 

 near purpurella ; he says, "very like Sparmannella, but certainly 

 distinct ; larger, the wings narrower, with fine violet and steel- 

 blue scales, the posterior wings paler ; flies after the beginning 

 of May, near Glogau, on old blooming sloe-bushes." 



Sp. 11. Unimaculella, Zetterstedt. (PI. III. fig. 16.) 



Capillis fuscis ; alis anticis aureo-purpureis, macula albida ad 



angulum anale. 

 Unimaculella, Zett., Ins. Lapp. 1008,11; "alas anticae pur- 



pureo-aureae, macula ad angulum ani alba." 

 Exp. alar. 5 lin. 



Head and face dark fuscous, almost black. Antennae dark 

 fuscous, about half the length of the anterior wings. Thorax, 

 abdomen, legs and tarsi dark fuscous. Anterior wings greenish- 

 golden with a purple gloss, with a conspicuous whitish spot 

 (slightly curved outwardly) on the inner margin at the anal angle; 

 cilia grey. Posterior wings broader than in the preceding, pale 

 grey, with the apex purple ; cilia grey. 



Scarce with us at present ; most of the specimens I have seen 

 have occurred in the north of England. Mr. Douglas took a 

 specimen at West Wickham Wood last April ; it probably also 

 appears in March. 



Unimaculella is distinguished from semipurpurella by its smaller 

 size, shorter antennae, darker head, and paler spot at the anal angle 

 of the anterior wings. In size it resembles purpurella, but here 

 again it is at once recognised by its paler spot at the anal angle, 

 and by the want of the purple fasciae and veins, and by the broader 

 posterior wings. 



Duponchel has an Adela unipunctella (xi. 370, ph 302, fig. 10); 



