146 Annals Entomological Society of America [Vol. IX, 



wing and extending less than half way across its caudal margin ; 

 first and second abdominal spiracles seldom partially covered 

 by wings; spiracular openings with an elevated, rounded, 

 smooth, lenticular margin, the lips of the openings rounded and 

 pitted; tip of abdomen rounded. Length, abdomen retracted, 

 20-25 mm., expanded 25-30 mm.; girth, 40 mm. 



Genus Eupackardia Cockerell. 



This genus strongly resembles Callosamia, except for the 

 points indicated in the key. The face parts are slightly elevated ; 

 antennae pectinate throughout, the stem of the fiagellum always 

 elevated above the level of the pectinations and about one-third 

 the total width; invaginations for the anterior arms of the 

 tentorium distinct; clypeo-labral suture indicated by a slight 

 furrow; maxillae measured on the meson one-sixth the length 

 of the wings ; tarsi of the first pair of legs and tips of the second 

 pair adjacent on the meson ; caudal part of the mesonotum and 

 metanotum depressed adjacent to the wings and strongly 

 wrinkled, the wrinkles extending over the first two abdominal 

 segments; wings with their distal margin always raised above 

 the level of the dorsal surface of the body; first pair of wings 

 with their anal angles rounded and opposite the cephalic margin 

 of the fourth abdominal segment ; second pair of wings scarcely 

 visible opposite the second abdominal spiracle, but otherwise 

 entirely visible around the first wing and extending below it on 

 the ventral surface, reaching about half the distance along the 

 caudal margin of the first wing; abdominal segments 8 to 10 

 tapering rapidly to form a cone-shaped piece; cremaster absent. 



This genus includes a single species. Eupackardia calleta is 

 reported from Arizo'na and Mexico. Its cocoon is very firm, 

 flask-shaped, with loose fibers of silk forming a sort of valve 

 across the open cephalic end. It is suspended from a twig by 

 means of a very short band of silk which encircles the twig. 



Eupackardia calleta Westwood. — Color generally dull black 

 with a yellowish face-piece; exposed surface of thorax, face- 

 pieces and appendages with fine indeterminate transverse 

 striations, remainder of surface practically smooth; dorsal 

 cephalic margin of abdominal segments 5 to 7 never produced 

 into flange-like plates; never with an elevated line between the 

 segment and the transverse conjunctiva; antennae of female 

 extends to tips of first pair of legs and length is four times 



