308 Catalogue of North American Sphinges. 
This species is not uncommon in the Southern States, and I 
have one specimen which was taken in Cambridge, Mass. 
_ 3..T? Nessus. Cramer. 
Dark brown; fore-wings with a sinuous and angular outer 
edge, a blackish brown band across the middle, another near the 
outer margin, and a small rust-red spot near the tip; hind-wings 
rust-red, with a dark brown hind-border; abdomen with two 
pale yellow bands behind the middle, four rust-red spots on each 
side, and a triple-tufted tail. Expands from two to two inches 
and a quarter. 
Of this species I have seen only females, in which the antenne 
are similar to those of the same sex in J’. Abbotii. The palpi, 
however, are more acuminated, and approach in form to those of 
Sesia Pelasgus, &c. It ought, perhaps, to be included in anew 
genus, which, without a knowledge of the larva and pupa, | shall 
not venture to propose. 
* * Wings entire; antenne thickened towards the end, with 
a minute terminal hook. 
Genus IX. Sesia. F. (Syst. Gloss.) 
1. S. Pelasgus. Cramer. 
Wings transparent and iridescent, with a broad purple-brown 
border and nervures; antenne and palpi, above, blue-black ; 
head and thorax olive; breast and legs eream-white ; abdomen 
purple-brown below, ochre-yellow above, with the two middle 
segments and a spot behind them purple-brown, and three lateral 
white spots ; tip with a central fan-shaped brown tail, and two 
black tufts on each side of it. Expands from two to two inches 
and one quarter. 
2. P. diffinis. Boisduval.. = fuciformis. Smith—Abbot. 
Wings transparent and iridescent, with a narrow blackish bor- 
der and nervures, and a rust-red spot at tip; antenna and palpi 
black above ; thorax and breast covered with pale yellow hairs ; 
abdomen black above, with two longitudinal patches of yellow 
hairs, the two middle segments black, the next two covered with 
yellow hairs, and the tip with .a fan-shaped tail, which is yellow 
in the middle and tufted with black on each side. Expands from 
one inch and three quarters to two inches. Larva, according to 
Abbot, (Ins. Georg. p. 85, pl. 43.) pale pea-green, reddish beneath, 
with a longitudinal dorsal line, a lateral pale yellow stripe, and # 
