Catalogue of Noi^th Ainerican Sphinges. 307 



the middle, and a large triangular brown patch near the tip ; hind- 

 wings with two or three obscure transverse brown lines ; male 

 with a triple-tufted tail. Expands two and a half to three 

 inches. Inhabits the Southern States. Larva pale green, with 

 three darker longitudinal dorsal lines, nine oblique yellowish 

 bands on each side, and a long, slender, nearly straight caudal 

 horn. Mr. Abbot, from whose figure (Ins. Geog. p. 59, pi. 30) 

 this description of the larva is taken, says that it feeds on Virgin- 

 ian creeper, Ampelopsis Hederacea, and that it enters the earth to 

 transform. The pvpa is elongated, chestnut-brown, with a short 

 anal point. 



My specimen of this insect was presented to me by Dr. J. E. 

 Holbrook. It is closely allied to several South American species, 

 figured by Cramer, such as his Fegeus, Gorgo?i, &c. ; and, in- 

 deed, the Fegeus may prove to be identical with it. 



M. Boisduval (Icones Hist, des Lepidopteres d'Europe nou- 

 veaux. Vol. II, p. 15) refers the Gorgon of Cramer [?] to his genus 

 Pterogon] but, in my opinion, the genus Thyreus of Swainson, 

 besides having the priority in point of time, is entitled to rank as 

 a distinct genus. Is the European Gorgon of Esper, Hiibner, 

 and Ochsenheimer, quoted in Mr. Children's Abstract of the 

 Characters of Ochsenheimer's Genera (Philos. Mag. N. S. Vol. V, 

 p. 37), the same as the Surinam species named Gorgon by Cra- 

 mer ? And if not, is M. Boisduval's citation of Cramer's name 

 correct ? 



2. T. Ahhotii. = Ahhottii. Swainson. 



Chocolate-brown ; wings very much indented on the outer 

 edge ; first pair with wavy and oblique blackish brown streaks, 

 and a black dot near the middle ; hind-wings yellow, with a 

 broad blackish brown hind-border : edge of the collar and a trans- 

 verse stripe across the thorax black ; abdomen banded with black 

 at base, tufted at the sides of the hinder segments, and terminated 

 by a triple-tufted rust-colored tail. Expands from two and one 

 third to nearly three inches. Larva, as figured by Abbot, 

 (Swainson's Zoological Illustrations, Part I, pi. 60) pea-green, 

 with narrow dorsal brown lines, nine lateral oblique yellowish 

 bands broadly bordered above with brown, and a long slender 

 slightly curved caudal horn. It feeds on the grape-vine. Pupa 

 chestnut-brown, with two yellowish abdominal incisures. 



