176 LEPIDOPTERA OF NORTH AMERICA. 



long, exceeding the thorax, slender and tapering at the extremity 

 into an ample hook with seta. The thorax is thick, moderately 

 advanced in front of the base of anterior wings and rounded. The 

 abdomen large, thick, cylindrico-conical and acute at the tip, more 

 than twice the length of the thorax. The wings are moderately 

 long ; the length of the anterior somewhat more than that of the 

 body, and about twice and a half longer than broad across the 

 inner angle; the hind border entire, slightly excavated from the 

 tip to medio-superior vein, and thence convex to interior angle, or 

 very oblique and almost straight, with the inner margin deeply 

 concave. The posterior are somewhat acuminated at the tips and 

 the hind margin slightly excavated before the inner angle. The 

 legs are long but strong, and the hind tibiae with two short and 

 two long spurs. Male. — Antennas ciliferous. Female. — Antennae 

 simple. 



Larva. The head is small and globose, and the segments of the 

 body anterior to the fourth much attenuated to the head ; these 

 and the head are capable of being retracted within the fourth, 

 which is much swollen. Instead of a caudal horn on the eleventh 

 segment there is a shining lenticular tubercle, and the body at this 

 part is rounded, and descends very abruptly to the anal shield. 

 It is ornamented with irregularly oval, stigmatal patches and a 

 faint subdorsal line. 



In repose, or when disturbed, the anterior rings are retracted 

 within the fourth, causing it to appear truncated and bulbous 

 anteriorly, and at the same time the body is thrown into a sphinx- 

 like posture. The larval transformation is subterranean. 



The pupa is cylindrico-conical; head-case distinct and promi- 

 nent; tongue-case not apparent. 



§ Syes moderate. Fore wings undulating. 



1. P. satellitia Linn. Ins. II, 148, 36. Sphinx lycaon Cramer. A. Pho- 

 lus lycaon Hiibner. Daphnis pandorus Hiibner. Figured in Drury, 

 I, pi. 20. 



Head, tips of the palpi and middle of thorax pale green, basal 



