344 



THE 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 Saturniidse in having two pairs of teeth to each 

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

 than half their length, ^hese moths also differ from most 

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

 though the antennc-E of the male are broadly pectinated, 

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

 very small. The thorax and abdomen are densely clothed 



Fig. 422. — Wings of Citheronia regalis. 



Fig. 423.— Wings of Anisota virgini- 

 ens is. 



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 wrings vein V, 

 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 



