48 HAUSTELLATA. — LEPIDOPTERA. 



f Sp- 2. Pityocampa. Alis griseis, strigis tribits obscurioribus, posticis pallidis, 

 liturd anali fused. (Exp. alar. 1 unc. 8 lin.) 



Bo. Pityocampa. Fahricius. — Cn. Pityocampa. Steph. Catal. No. 5996. 



Wings more elongate and narrow than in the last : anterior griseous or cinereous, 

 with three dusky undulated strigse, the two basal ones nearly parallel, the third 

 ■ united by an acute angle to the second, with a dusky lunule between on the 

 disc : cilia ashy spotted with white : posterior wings pale, with a dusky spot at 

 the anal angle : antenna? reddish-yellow : head and thorax ashy-gray : abdo- 

 men brown. 



Caterpillar blackish or dusky-gray, with a whitish lateral line and margins to the 

 segments, the dorsal hairs luteous, the lateral whitish : it feeds on various kinds 

 of pine and fir, and changes to a pale brown pupa, beneath stones or under moss, 

 in a reddish-brown cocoon. 



There appears to be a single tlwarf specimen or a variety of this 

 insect in the collection at the British Museum; it was taken by 

 Dr. Leach in Devonshire, in the summer of 1825. The larvae are 

 less regularly processional than those of the preceding species, and 

 the pupse are less social. 



Genus LV. — Clisiocampa, Curtis. 



Palpi minute, concealed by scales, triarticulate, the basal joint shorter and more 

 slender than the second, the tenninal joint very minute, oval : maxillw ob- 

 solete. Antenna short, curved, moderately bipectinated in both sexes, the 

 pectinations gradually decreasing in length to the apex, and shortest in the 

 females : head minute, scarcely visible from above : tho?-ax robust, pilose : 

 abdomen somewhat elongate, robust in the females, and slightly tufted in both 

 sexes : wings rather acute, a little reversed when at rest, short in the male, 

 elongate in the female : legs rather slender : femora and tibice pilose. La7-va 

 cylindrical, slightly pilose, gregarious : pupa elongate, posteriorly attenuated ; 

 enclosed in a loose silken web, sufilised with a fine powder. 



Clisiocampa may be known from the preceding genus, Avhicli 

 resembles it in its abbreviated, incurved antennae, by the opacity 

 and brevity of its wings, and from all the foregoing by the shortness 

 of its antennae, and acuteness of its wings. The larvae are grega- 

 rious, irregularly processionary ; frequently change their habitation, 

 and previously to their metamorphosis into pupae retire solitarily, 

 and effect their transformation : the pupae elongate, attenuated 

 posteriorly, and enclosed in a double silken powdery web : the eggs 

 are naked, and placed in rings round the young twigs of plants. 



Sp. 1. castrensis. Plate \S.f. 2. $. — Alis anticis maris pallidis, strigis duaLus 

 fascidque posticd briameis ; famina; ferrugineis fasciis duabus pallidis. (Exp. 

 alar. $ 1 unc. 2— 4 lin.: $ 1 unc. 6—9 lin.) 



