344 



7 HE STUDY OF INSECTS. 



size, some of them being nearly as large as the largest of our 

 moths. The most obvious character limiting this family is 

 the structure of the antennae of the male. These agree with 

 those of the Saturniidae in having two pairs of teeth to each 

 segment, but differ in being pectinated for only a little more 

 than half their length. These moths also differ from most 

 Saturniidae in having two anal veins in the hind wings. Al- 

 though the antennae of the male are broadly pectinated, 

 those of the female are filiform. The palpi and maxillae arc 

 very small. The thorax and abdomen are densely clothed 



ni 3 



! nr s 



Fig. 422. — Wings of Citheronia regalis 





Wj 



r^'jMsJ'*'^*^ \ 







r 3 



^T^O^O 



HVIIi 



XI V \^N^^ 



7 VII, 



IX 





FlG. 423. — Wings of Anisota virgini- 



ensis. 





with long hairs. The wings are strong, with prominent veins. 

 The frenulum is wanting, and the humeral angle of the hind 

 wings is very largely developed. In the fore wings vein V T 

 arises from the discal vein (Figs. 422, 423). 



The larvae are armed with horns or spines, of which 

 those on the second thoracic segment, and sometimes also 



