LEPIDOPTERA HETEROCERA. 99 



obliquae, incisuris duabus bene deterrninatis, margine interiore un- 

 dulato ; posticae margine exteriore denticulato. 



Thyreus, Swainson, Zool. Illustr. Harris, Amer, Journ. Sci. 



xxxvi. 

 Sphinx, p., Fair. ; GmeL 

 Amphion, H'ubn. Verz. Schmett. 134. 



Body very broad. Head obtuse in front. Proboscis long. 

 Palpi short and thick. Antennae setaceous, much longer than the 

 thorax. Abdomen about twice the length of the thorax. Legs 

 rather slender ; hind tibiae with four moderately long spurs. Wings 

 narrow. Fore wings straight in front, truncate at the tips, very ob- 

 lique, and with two deep notches along the exterior border ; interior 

 border undulating; fourth inferior vein very remote from the third. 

 Hind wings denticulate along the exterior border. 



1. Thyreus Abbotii. 



Ferrugineofuscus ; corpus subcinerascens, subfasciatum ; antenna 

 testacece ; alee strigis obliquis nigricantibus, posticce dimidio 

 antico flavo. 



Thyreus Abbotii, Sivainson, Zool. Illustr. i. pi. 60. Harris, Amer. 

 Journ. Sci. xxxvi. 



a, b. New York. Presented by E. Doubleday, Esq. 

 c. Georgia. From Mr. Abbot's collection. 



2. Thyreus Nessus. 



Ferrugineofuscus, subtus rufo-lutescens ; thorax vittis duabus late- 

 ralibus anticis pallidis ; abdomen fasciis duabus angustis 

 pallide flavis ; alee ciliis ex parte pallide Jiavis, anticce sub- 

 cinerece, fasciis variis obliquis nigricantibus, macula costali 

 subapicali rufa; posticce obscuriores, vitla obliqua rufa. 



Sphinx Nessus, Cram. Pap. Exot. ii. 9, pi. 107, f. D. Fabr. Sp. 



Ins. ii. 140, 2 ; Mant. Ins. ii. 92, 2 ; Ent. SysU iii. 1, 355, 2. 



GmeL ed. Syst. Nat. i. 5, 2372, 91. 

 Amphion Nessus, H'ubn. Verz. Schmett. 135, 1444. 

 Thyreus ? Nessus, Harris, Amer. Journ. Sci. xxxvi. 



a. Trenton Falls, New York. Presented by E. Doubleday, Esq. 



b. Orilla, West Canada. From Mr. Bush's collection. 



K2 



