NOTODONTIDjE. PYGiKRA. 



11 



fcristatus: T denticulatse: 



4hv ? 



r hand den 

 tato: 

 Thorax \ 



AIw 



Integra; : 

 Antennae • 



breves, arcuatae: 



dentato, 

 apice : 



^subelongatae, rectae: 



i subhyalinae : 

 elongatae, -c 

 l^haud crista- \ (opacae, (nullisele- 



tus : Alee < squamis < vatis : 



( elevatis : 

 breves, lata;, subtriangulares : 

 Cintegro: fpilosEe: ..... 



I rtZar< I subdiaphafiffi : 



I (_ squamosee, < 



I (^opacffi: 



\ f baud cris- fvix elon- 



Itatus : I gatcB, apice 

 Alee an- \ obtuso : 39, 

 ve denticu- I Thorax \ ticcc 1 elongata;, 

 l^lato, dorso J I I apice sub- 



j I (_acuto: 40, 



( l^cristatus : , . 41. 



l_bidentato : . . . . 42. 



Pyg^ra. 

 Clostera. 



Episema. 

 Cerura. 



Petasia. 



Stauropus. 



Endromis. 



Ptilophora. 



Peridea. 



44. Chaonia. 



NOTODONTA. 



Leiocampta. 



lopiiopteryx. 



Ptilodontis. 



Genus XXXIV. — Pyg^ra, OcTisenheimer. 



Palpi short, porrect, densely pilose, two-jointed, basal joint incurved, second 

 reversed, obtuse. Antennce rather long, pectinated in the male, each articu- 

 lation producing a duplex cilia on each side, the apex simple ; setaceous in the 

 female : head small, with a bifid crest at the base of the antenna? : thorax stout, 

 strongly crested, with two elevated lateral strigae : abdomen long, the apex with 

 an undivided tuft : wings, anterior elongate, triangular, the apex with a large 

 rounded discolorous patch, the hinder margin denticulated ; posterior entire : 

 tibiae with spurs. Larva cyhndric, pilose, without elevated appendages, the 

 anal legs perfect : pupa subterranean. 



Pygsera appears to be far more closely allied to Cossus than to 

 any other genus amongst the Pomeridiana ; its thickened and some- 

 what denticulated antennae, stout thorax and abdomen, the latter 

 considerably elongated, and the texture of the elongate-subtriangular 

 wings, oifering far more important points of similarity to the He- 

 pialidse than are furnished by the broad subdiaphanous rounded 

 wings, comparatively slender thorax and abdomen, the latter ab- 

 breviated, and deeply pectinated antennae of the Saturnige, which 

 are usually considered as forming a direct passage from the family 

 last mentioned to the other Pomeridiana. 



Sp. 1. bucephala. Alis argenteo-cinereis, strigis duahus geminatis ferrugineis, 

 viacuMque magna terminali Jlavd. (Exp. alar. $ 2 unc. 2 — 6 : $ 2 unc. 

 8—11 lin.) 



