bombycid;r. — pcecilocampa. 43 



they form a hard oval egg-like cocoon, not a subfusiform double 

 silken web, suffused with a loose powder, as formed by those of 

 Clisiocampa ; the imago differs from that of the genus last named 

 by having the ahtennse straight, serrated in the females ; the wings 

 rounded, obtuse, and abbreviated in both sexes ; the legs stout, and 

 very pilose ; the abdomen strongly tufted in both sexes, and of the 

 female furnished at its extremity with a downy mass; the head 

 distinct and very hairy, and the proportions of the palpi different. 



Sp. 1. Crataegi. Alts cinereis, strigis duahus, aut fascia obscuriore fuscis. (Exp. 

 alar. $ 1 unc. 1—3 lin. : ? 1 unc. 2—5 lin.) 



Ph. Bo. Cratsgi. LinnL—Don. iv. pi. 1 17.— Tr. Crataegi. Steph. Catal No. 5992. 



Antenna? fuscous : thorax and abdomen ashy-gray : anterior wings cinereous, 

 with an incurved striga before the middle, arising from the base of the wing, 

 and reaching to the costa, near which it makes an acute angle, and behind the 

 middle another, very much angulatcd, dusky-black ; between these the colour 

 is usually darker, with generally an obsolete dusky central spot; the hinder 

 margin is cinereous, with a row of minute fuscous spots on the margin, and 

 frequently an undulated dusky striga: posterior wings brownish, with an ob- 

 hque darker bar. Female darker, fuscous: the anterior wings with two un- 

 dulated strigse, obscurely edged with whitish; posterior immaculate. 



Both sexes vary considerably in size and colour; the male has the striga; on the 

 anterior wings sometimes nearly obliterated : and the female has frequently 

 several whitish transverse waved or angulatcd striga.-. 



Caterpillar black, with luteous hairs and white fascia;, and a few rusty spots ; the 

 sides with an interrupted streak of whitish spots : it feeds on whitethorn, sloe, 

 and willow : changes to a dusky-brown pupa in June, and the imago appears 

 in September. 



Not common, though not unfrequently met with near Darenth, 

 Birch, and Coombe woods. " Epping." — Mr. H. Douhleduij. 



GeN'US LII. PCFXILOCA.MPA* mihi. 



Palpi extremely minute, subglobose, enveloped in slender elongate hairs : maxilhB 

 obsolete. Antennae densely bipectinated in the males, the pectinations scarcely 

 decreasing towards the apex, strongly serrated in the females : head very small 



since, and the collection of insects at the Exeter Institution arranged in con- 

 formity therewith in 1821, although several of them have been recently pub- 

 lished from a transcript of rny original catalogue under other names. A com- 

 parison betAveen the genera of Ochsenheimer, Latreille, Germar, &c. with those 

 herein given, wiU readily show how far I have been anticipated, and my divisions 

 adopted. 



• Tio$y.i>.'j; varixLs: y.v.fy.-rr, cruca. 



