428 LEPIDOPTERA. 



outer hind margin, of a deep purple-brown color ; the band 

 is edged internally with olive-green, and marked towards 

 the edge with a slender wavy white line ; near the middle of 

 the wing, and touching the brown stripe, are two brown 

 spots, one of them round and the other kidney-shaped ; and 

 on the middle of the inner margin there is a large triangular 

 olive-colored spot ; the under side of the same wings is yel- 

 low, and near the middle there are a round and a kidney- 

 shaped black spot. The hind wings are yellow above and 

 beneath ; on the upper side with a broad purple-brown hind 

 border, on which there is a wavy white line, and on the un- 

 der side with only a central black dot. The head is black. 

 Along the middle of the thorax there is a broad crest-like 

 stripe of black and pearl-colored glittering scales. The 

 shoulder-covers are white. The upper side of the abdomen 

 is yellow, with a row of black spots on the top, and another 

 on each side ; the under side of the body, and the large muff- 

 like tufts on the fore legs, are white ; and the other legs are 

 black. This moth rests with its wings closed like a steep 

 roof over its back, and its fore legs stretched forward, like a 

 CERURA. It expands from one inch and a half to one inch 

 and three quarters. 



Eudryas unio, of Hiibner, the pearl Eudryas, as its name 

 implies, is a somewhat smaller moth, closely resembling the 

 preceding, from which it differs in having the stripe and 

 band on its fore wings of a brighter purple-brown color, the 

 round and kidney-shaped spots contiguous to the former also 

 brown, the olive-colored edging of the band wavy, with a 

 powdered blue spot between it and the triangular olive- 

 colored spot on the inner margin, and a distinct brown spot 

 on the inner hind angle of the posterior wings ; all the wings 

 beneath are broadly bordered behind with light brown, and 

 the spots upon them are also light brown. It expands from 

 one inch and three eighths to one inch and a half. This spe- 

 cies has been taken in Massachusetts, but it is rare, and the 

 caterpillar is unknown to me. 



