310 Catalogue of North American Sphinges. 



3. T. denudatum. 



Chestnut-brown ; fore-wings opaque, with a large triangular 

 transparent spot adjacent to the outer hind-angle, a rust-red spot 

 at base and another near the middle ; hind-wings transparent, 

 with the margin and fringe brown, and a rust-red costal spot ; 

 orbits, edges of the collar, incisures of the abdomen, tibiae, and 

 tarsi dull yellow ; antennae brownish above, rust-yellow at tip 

 and beneath. Expands from one inch and a quarter to more than 

 one inch and a half. The transparent spots at the tips of the 

 fore-wings have the appearance of being caused by the removal 

 of the colored scales. 



The specimens, from which the descriptions of these three spe- 

 cies are drawn up, had become somewhat oily, and it is possible 

 that some of their characteristic markings may have become ob- 

 literated. 



Genus XT. ^gerta. F. (Syst. Glossat.) 



Sesia. F. (Entom. Syst.) Latr. Boisd. Trochiliimi. Scopoli. 



1. ^. tricincta. H. (Catalogue.) 



Blue-black ; fore-wings opaque ; hind- wings transparent, with 

 the border^ fringe, and a short transverse line near the middle 

 black ; palpi at tip, collar, a spot on each shoulder, and three 

 bands on the abdomen yellow ; antennae short, black ; four pos- 

 terior tibiae banded with orange ; tarsi yellow, tipped with black ; 

 tail flat, with two longitudinal yellow lines. Expands from one 

 inch to one inch and two lines. 



This species seems to come near to the European Asiliformis ; 

 but the male has only three yellow abdominal bands ; while in 

 the Asiliformis there are five bands in the male sex. The an- 

 tennae are shorter and thicker than in the following species, and 

 are furnished beneath with a double row of short pectinations or 

 teeth, which are thickly fringed with hairs. The sexes were 

 captured together upon the common tansy. 



2. JE. CucurbitcB. H. (New-England Farmer.) 

 Fore-wings opaque, lustrous olive-brown ; hind-wings transpa- 

 rent, with the margin and fringe brown ; antennae greenish black ; 

 palpi pale yellow, with a little black tuft near the tip ; thorax 

 olive ; abdomen deep orange, with a transverse basal black band, 

 and a longitudinal row of five or six black spots ; tibias and tarsi 

 of the hind-legs thickly fringed on the inside with black, and on 



