﻿NORTH AMERICAN SPIIINGIDJE. 133 



front; the tongue as long as the body. The thorax is advanced and tapers in front 

 to the head, and is smooth. The abdomen is twice longer than the thorax, cylindrico- 

 conical, with an abundant terminal tuft in both sexes ; very sparingly tufted on the 

 sides. The legs are slender and smooth, the posterior tibia with four moderate spurs. 

 The anterior wings are as long as the body without the tuft; three times longer than 

 wide across the inner angle ; tip acuminated, the hind margin entire and obliquely 

 convex from the tip to the medio-posterior interspace, where it is angularly indented; 

 the inner angle salient and the inner margin concave above it. Hind wings rather 

 short, obtusely rounded at the tip and the hind margin entire. Male. — Antennae 

 finely ciliferous. Female. — Antennae simple. 



Larva. — Tapers anteriorly from the third segment, body cylindrical, head small 

 and the eleventh segment with a caudal horn. It is ornamented with rows of 

 vascular round spots, and irregularly elliptical subdorsal and lateral spots. The 

 metamorphosis takes place on the surface of the ground in an imperfect cocoon. 



Duponchel describes the larva of this genus, under the name Pterogon, as having 

 a lenticular tubercle instead of a caudal horn. The outline of the wings, as given in 

 the diagnosis, differs also from the European type, in which the fore wings are slightly 

 hooked, with two or three distinct dentations. Abbot and Smith represent the wings 

 of Gaurce with these peculiarities, but my specimens do not correspond. 



SPECIES . 



Gaurse. — Olivaceous, with the hind wings reddish yellow and a terminal black border. 

 Clarkise. — A variety of Craurse or the same ? 



9. P. GrAUR^:. — Sphinx Graurse Abbot & Smith, I. 61, pi. 31. Proserpinus (laurse Hilbv. Yerz. SeJimett, 

 122, 1414. Thyreus Gaurae Walker, p. 100. 



Antennae brownish green and whitish at the tips. Palpi beneath, white ; the tips of the palpi, head and 

 thorax greenish, with a greenish white line on the sides of the head and thorax. Abdomen greenish or 

 brownish green, and the apical tuft the same, with the hind portions of the segments paler. Anterior wings 

 pale yellowish green, with deep green shades; the basal portion pale yellowish green, with a broad, median 

 dark green band, the anterior edge of which is concave, and its posterior, beginning on the costa at the 

 origin of the post-apical vein, inclines to about the middle of the inner margin. The median band is 

 bordered posteriorly with pale yellowish green, and the terminal border is shaded with bright greenish, 

 deepened toward the costa and tip, with a pale streak at the tip and a pale line from the costa to subcosto- 

 inferior vein. The discal spot is dark green on a somewhat lighter ground. Posterior wings orange, with 

 a narrow terminal blackish band; sometimes the orange color is deepened to reddish above the terminal 

 band; fringes paler. 



Smithsonian Institution. From Lieut. Orauneh's collection, Texas. 



? 



Young Larva. ? 



Mature Larva. — Head green. Body dark green ; with the first segment banded with white containing 

 mr black points; with a vow of vascular black dots, and two rows of semi-elliptical black dorsal patches 



34 



