147 



The difference between this form and our common species will, I 

 think, be easily seen upon comparison ; the larger size, white abdo- 

 men, and shorter buff costal streak being strong characters, entitling 

 it, I think, to rank as a species. The whole of the examples I saw 

 were constant in their markings, not less than 20 having been exam- 

 ined by me. 



EUCHCETES EGLENENSIS. Clem. 



Larva. (Full grown.) 



Body wholly bright dark orange. Head rather small, shining. On 

 each segment are 7 tufts of mouse-colored hairs, those of the second 

 and third segments being the longest. These hairs spring from small 

 brownish tubercles. The base of abdominal legs, brownish at the 

 sides. 



Length, i.io inch. 



Food Plant, species of Asclepias, but chiefly A. tuberosa. 



Imago. (Fall brood.): 



Wings white, with a pinkish or lead-color tinge. Costal margin dis- 

 tinctly buff for its basal half. Abdomen bright buff, strongly marked 

 with the usual rows of black dots. Apices of the wings more decid- 

 edly rounded than in E. collaris, and the lead-colored shade beneath 

 extends more generally over the surface. The veins of the upper and 

 lower wings also are decidedly marked with yellow. Palpi and legs 

 as in .£■ collaris. 



(Spring brood.): 



With the same markings, but the whole upper and lower surfaces of 

 the wings are bright mouse-color, this shade encroaching on the collar 

 of the thorax and the fore coxae. 



Exp. wings <5 , 30 mm. $ , 32 mm. 



EucHCETEs EGLE. Drury. 

 Larva. 



Black, entirely covered with long hairs and tufts. Dorsal region 

 wholly black. From each side spring 11 bunches of bright orange 

 hairs, which almost meet each other on the dorsum. From the 2d 

 and 3rd segments arise 4 long pencils of black hairs. From the 4th, 

 2 pencils, and behind these 2 smaller but longer ones, all of clear white. 

 These are all directed anteriorly. From the nth and 12th spring 

 other long black pencils, 2 to each segment. These are directed 

 posteriorly. Behind these again are 2 pencils of clear white hairs. 

 The anal segment bears a long and fan-like black tuft. From the 

 sides of the middle segments spring shorter pencils of black hairs, 

 directed laterally, and below these, covering the spiracles, are some 

 sordid white tubercular masses of hairs, as in some Arctias. 



Length, full grown, i.io inch. 



