50 HAUSTELLATA. — LEPIDOPTERA. 



Latreille to Gonoptera; the latter of wliicli is equally objectionable 

 with Calyptra, as a name of similar import, though slightly dif- 

 ferent in its orthography, was long since applied by Dr. Leach to 

 Papilio Rhamni, as described in vol. i. p. 8. It would therefore 

 be the best course to follow Treitschke, and retain Calpe as the 

 generic name, were it not that Ca. libatrix differs considerably 

 from the type, whence a difficulty arises on that head, which induced 

 me to employ Calyptra in my Catalogue, and to retain that name 

 for the British species. The location of the genus is far from 

 satisfactory, but it has apparently some points of resemblance to 

 Eriopus and Thyatira, rather than with any other indigenous 

 genera, though its affinity thereto is very remote. 



Sp. 1. Libatrix. Alts anticis griseis rufo-nehulosis punctis duobus niveis, stri- 

 gdque geminatd posticd obliqud alba. (Exp. alar. 1 unc. 8 — lOlin.) 



Ph. No. Libatrix. Linne. — Don. vi. pi. 216. — Ca. Libatrix. Sieph. Catal. 

 part ii. p. Q5. No. 6299. 



Antennae griseous, with a snow-white spot at the base; headfusco-griseous; thorax 

 rufo-griseous, with the anterior margin^ a dorsal line, and a transverse streak 

 fuscescent : anterior wings fusco-griseous, with an irregular extended patch at 

 the base rufous, sprinkled with minute yellowish dots, and a row of whitish ones 

 on the central nervure ; this patch is divided transversely by an obscure whitish 

 striga margined exteriorly with fuscous; a little behind the middle is an 

 oblique geminated white striga edged interiorly with fuscous, from thence 

 to the hinder margin plain griseous, with minute fuscous dots, and an obso- 

 lete undated whitish striga ; at the base of the wing is a small snow-white 

 spot, in place of the anterior stigm a asecond, and in Heu of the posterior 

 stigma two black dots, placed transversely: abdomen rufescent; posterior 

 wings fuscous, with a darker streak behind the middle, the base sometimes 

 cinereous : legs griseous, tibia with a white spot ; tarsi snow-white, annu- 

 lated or spotted with ferruginous. 



CaterpUlar green, with reddish stigmata and a white lateral line : it feeds on 

 the poplar, and on willows: — the imago appears towards the end of July 

 and in April, and sometimes during the winter. 



An abundant and highly beautiful species, frequenting places 

 where poplars and willows abound, secreting itself in weedy banks, 

 under bridges, outhouses, &c. " York and Newcastle." — W. C. 

 Hewitson, Esq. " Epping." — Mr. H. Douhleday. " Carlisle." — 

 T. C. Heysham, Esq. 



