250 ELACHISTID A, 
species we have yet observed, excepting 2. ru/focinerea, of which, 
though the larva has not been found, the pupa has on several 
occasions been met with and reared. 
The species of this genus are extremely numerous, and forty 
are already known as British, which may be arranged in the fol- 
lowing table :— 
a. Anterior wings dark brown or black, with sharp metallic fasciee and 
spots. Species 1-5. 
aa. Anterior wings dark brown or black, with a distinct pale fascia 
and spots. Species 6-11. 
aaa, Anterior wings grey or black, with an indistinct pale fascia and 
spots, or with spots only. Species 12-21. 
aaada. Anterior wings dark fuscous or black, with a single distinct 
white, whitish, or yellowish fascia. 
é. Head dark. Species 22-24. 
6 6. Head pale. Species 25-28. 
a@aaaa. Anterior wings white or grey, with a distinct dark spot on 
the fold in the middle. Species 29-33. 
aaaaaa. Anterior wings white, with a few distinct dark spots. 
Species 34, 35. 
a@aaaaaa. Anterior wings white or whitish, irrorated with dark 
atoms. Species 36-38. 
aaaaaaaa. Anterior wings unicolorous. Species 39, 40. 
1. Pfeifferella, Hiib. Tin. 398 (1816); Step.; Zell.; Sta— 
quadriguttella, Waw. lis anticis nitidis aureo-brunneis, fascia angu- 
lata ante medium, maculis duabus sudoppositis triangularibus pone me- 
dium nitidis aureis. Exp. al. 4 lin. 
Head, face, and palpi golden-brown. Antennze fuscous. Anterior 
wings glossy golden-brown, with a slender angulated bright golden 
fascia before the middle, nearest to the base on the inner margin; be- 
yond the middle is a triangular golden spot on the inner margin, and 
nearly opposite to it, but placed a little posteriorly, is a larger spot of 
the same colour on the costa; cilia golden-brown, at the extreme apex 
grey. Posterior wings greyish-purple, with grey cilia. 
Not uncommon in many localities in May; it seems rather 
partial to a chalky soil, yet I have found it on clay. 
2. 'Treitschkiella, I’. v. R. 297. pl. 100. f. 4 (1843); Sta.; Dup.? 
Alis anticis nitidis aureo-brunneis, fascia arcuata ante medium, macula 
triangulari dorsali pone medium, macula triangulari costali posteriore, 
nitidis aureis. Exp. al. 3 lin. 
Head, face, and palpi golden-brown. Antenne fuscous (annulated 
with whitish ?). Anterior wings shining golden-brown, with a slender, 
slightly curved, pale golden fascia before the middle, nearest the base 
on the inner margin; beyond the middle is a triangular pale golden 
spot on the inner margin, and deyond it is a costal spot, nearly trian- 
