OF NORTH AMERICA. 145 



ZYG^NID^. 



CASTNIIN^, 



Genus. EUDRYAS. Boisduval. 



" Head rather large, eyes and ocelli large and full. Antennae not 

 thickened in the middle, with short lateral setae in the male and pubes- 

 cent beneath. Front prominent, densely pilose, though the hairs 

 hardly conceal the conical clypeal tubercle, which last is very large 

 and truncated at the apex. The clypeus in front is square. Palpi 

 large, porrect ; two basal joints evenly pilose to the tip of the second. 

 Third joint small, cylindrical, short, porrect reaching nearly one-half 

 its length be}ond the front. 



"Thorax pilose, with a broad median crest of metallic-colored 

 scales, succeded by a dorsal row of similar tufts upon the basal half 

 of the abdomen which diminish in size from the thorax. 



"Wings shaped as in afypia, but the primaries are more rounded at 

 the apex, internal angle rounder. The nervules are nearly continuous 

 with the direction of the main branches. Subcostal nervules long, 

 first subcostal arising one-third of the distance out to the apex of the 

 wing. The hind wings hardly reach to the outer fourth of the abdo- 

 men, being much as in alypia. Outer margin a little scolloped below 

 the apex, below straight and parallel with the costa of the primaries. 

 Discoidal nervules situated within the middle of the wing. The femora 

 and tibiae of the fore-legs are very pilose, forming a dense tuft project- 

 ing in a mass over the first tarsal joint. Hind pair of legs stout, with 

 longer tibial spines than in alypia. 



''Larva. The head is of good size, being three-fourths as wide as 

 the body. It is nearly as broad across the vertex, as in front, above it 

 is. rather deeply impressed by the median line. The V-shaped epicra- 

 nium is large, not sunken below the level of the front ; its apex is 

 rather blunt, its sides bulge out from the apex to the anterior third of 

 its length, where it is slightly contracted ; and where it joins the cly- 

 peus its edge is linear. The short transverse clypeus is as broad as 

 the epicranium is long, its front edge being straight and very slightly 

 raised. 



" The labrum is divided half of its length by a sinus, into two lobes 



