428 Annals Entomological Society of America [Vol. XI, 



Cressonia juglandis A. & S. 



Color varies from reddish brown to nearly black, always dull and 

 opaque; surface of body roughened with spines which are larger along 

 the caudal margin of abdominal segments 4-7 and on the antennae; 

 head with six spiny tubercles, two between the bases of the antenna?, 

 two on the clypeus and one on either side between the clypeus and 

 glazed eye, almost in line with the clypeal tubercles; clypeo-labral 

 suture distinct; antennas in both sexes extending as far caudad as the 

 prothoracic legs; maxillas extending for a little more than one-third of 

 the distance to the caudal margin of the wings; abdominal segments 

 showing annulets on the dorsum, segments 4-7 with a prominent lateral 

 ridge covered with curved spines which project cephalad; segments 

 9-10 with longitudinal wrinkles on the dorsum; scar of caudal horn 

 very prominent with a rounded spiny elevation just laterad on each 

 side; cremaster 1 mm. or less long, the caudo-lateral angles usually 

 produced into sharp ]Joints. Length of pupa 28-38 mm., greatest 

 width 9 mm. 



Subfamily Sesiin.^. 



The members of this subfamily in America belong to the 

 genera Pseudosphinx, Hsemorrhagia, and Erinnyis. Pseudo- 

 sphinx does not have any spiracular furrows, whereas the other 

 genera have them extending for a considerable distance dorsad 

 and ventrad of the spiracle. The members of this subfamily, 

 in common with Pholus and Proserpinus, have a very peculiar 

 type of ridge on the mesothorax, caused mostly by the deep 

 furrows which surround it. The general type of body is the 

 same in these genera, differing markedly from the remaining 

 genera of Philampelinae. The labrum is sometimes on the 

 cephalic end of the body, but oftener pushed back on the dorsal 

 surface. The antennee are filiform and may vary slightly in 

 length in the sexes, but not otherwise. The eye-pieces are much 

 like the Acherontiinae, except that they come nearer to touching 

 the maxillae. The Sesiinae, and the two genera of Philampelinae 

 which resemble them, all have another character in common, a 

 portion of the prothoracic femur exposed, showing them to be 

 more generalized than the remainder of the Philampelinae. 

 This is only present in some individuals in Hasmorrhagia, 

 which is in other respects by far the most specialized of the 

 group. 



