Saturniidae 



This common insect, which ranges from Canada to 

 Florida, and westward and southward to Texas and 

 Mexico, subsists in the larval stage upon a large variety of 



trees and shrubs; in fact, the 

 caterpillar is almost omnivo- 

 rous. The larva is a beautiful 

 object, the body being green, 

 ornamented with a lateral 

 stripe of pink and creamy 

 white and covered with 

 clusters of branching spines. 

 These are possessed of sting- 

 ing properties, and the cater- 

 pillar should be handled with 

 extreme care, if painful con- 

 sequences are to be avoided. 

 In spite of this defense the 

 larvae are greatly liable to 

 the attack of ichneumon 



which 



Fio. 43.-Larva of Aulonteris io. 



(After Riley.) tudes of them. 



Genus HYLESIA Hiibner 



This is a neotropical genus of small size, one species of 

 which, common enough in Mexico, is occasionally found in 

 Arizona. It is a true Saturnian, the secondaries having but one 

 inner vein and the discal cells in both wings being closed. 



(i) Hylesia alinda Druce, Plate VIII, Fig. 12, $. (The 

 Alinda Moth.) 



The specimens I have were taken on the Mexican border of 

 Arizona. So far as I remember, nothing has been written upon 

 the life-history of the species. 



SUBFAMILY HEMILEUCIN^E. 



The moths of this subfamily may be structurally differentiated 

 from their near allies by the fact that the hind wings have two 

 distinct internal veins, i a and i b. The antennas of the male 

 insect in the genus Coloradia are doubly bipectinated. In the 



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