80 HAUSTELLATA. — LEPIDOPTERA. 



shining ; ahdomen of the males somewhat robust, densely pilose ; of the fe- 

 males naked, rather glossy above, with a woolly mass at the apex, the ovi- 

 positor exserted, subtruncate: icings elongate, rounded posteriorly, very 

 transparent, slightly hairy ; wanting in the females: cilia moderate: legs slender, 

 transparent, scarcely pilose ; postei~ior tarsi with very short spurs at the apex. 

 Larva enclosed in a case, composed of bits of leaves, &c. in which it changes 

 to an elongate pupa. 



This curious genus and Fumea are remarkable for the singularity 

 of their habits, and ought possibly to constitute a family by them- 

 selves, rather than be associated with the Arctiidse ; but, vmless that 

 family be considerably dismembered, no great advantage would 

 arise from their separation, and their present location is unques- 

 tionably not far from their natural position, as pointed out by the 

 genera Penthephora and Nudaria, which have evidently consider- 

 able affinity in their perfect states, the former genus being desti- 

 tute of maxilla?, with semitransparent and almost scaleless wings 

 (abbreviated in the females of some of the species), and Nudaria 

 resembling them in the texture of the latter organs, and in their 

 want of scales. Dr. Horsfield places them with the Hepialidse, to 

 which he unites them by means of the singular genus Oiketicos, 

 of Guilding; but, although the larvse may indicate the affinity, the 

 imago is more allied to the Arctiidaj ; but these affinities may be 

 readily comprehended by the diagram to which I have before 

 alluded, and which clearly shows that it is impossible to define the 

 absolute line of demarcation in the larger groups, and that, although 

 writers necessarily differ in the linear arrangements, such differences 

 are more apparent than real, 



Sp. 1. fusca. Plate 18./. 3 ^/. 4 ?. Alis paUidefuscis, concohrihus, imma-^ 

 cidatis, abdomine dilutti cinerascente. (Exp. alar. $ 8— 9^ lin. $ aptera, 

 long. corp. 2 — 2^ lin.) 



Nu. fusca. Haworih.—Fs. fusca. Stej^h. Catal. No. 6034- 



Male with the antennae dusky-brown : the thorax grayish-black ; the abdomen 

 pale cinereous, with an ochraceous tinge: wings very transparent, all pale 

 cinereous-brown, immaculate : legs and under side of the thorax and abdomen 

 pale ochraceous ash. Female apterous, with the head and thorax very glossy 

 dusky-brown ; the abdomen dusky, and rather shining on the back, the sides 

 cinerascent: legs pale transparent ashy-colour. 



" I first took the larvae in Hornsey-wood, in the summer of 1820, and reared 

 two males ; after several unsuccessful seasons, I again met with them and the 

 pupa on 22d June and 4th July, 1827, in great abundance, on the leaves of 

 the hazel and sallow, and on the leaves and trunks of young oaks, from which 

 I bred only three males, nearly all the larva; being infected with ichneumons. 



