252 LEPIDOPTEEA. 



reaching over the head. The angular arched chrj'salids have 

 the head either square, or sliglitly notched, with a smooth 

 thorax, wliile on the back of the abdomen are two rows of 

 usually gold colored tubercles. They^ usually feed on violets, 

 and ma}^ l)e found from May to July. Argynnis Idalia Drury 

 is found the last of summer. A. Cyhele Fabr. is found' in the 

 Middle States, and A. Atlantis Edwards in the White Moun- 

 tain valleys and the colder portions of New England. 



Mr. C. A. Shurtleff discovered the larva and pupa of the lat- 

 ter, July 17th, at Eastport, Maine, and being with him at the 

 time, we made the following description of them : The larva 

 is uniformly cylindrical, tapering alike towards each end of the 

 body. On each side of the vertex of the head is a small low 

 spine, giving the head an oblong shape when seen sidewise. 

 The front is broad, somewhat square, flattened, with scattered 

 hairs. On the first and second thoracic rings are two lai-gc 

 subdorsal spines and minute lateral warts bearing small bris- 

 tles, and on the hind edge of these rings are two large spines. 

 On the third thoracic ring are three large spines. On each 

 abdominal ring are six stout spines of the same size and placed 

 equidistant on the upper surface. The bristles on the spines 

 are nearly one-half as long as the spines themselves. Small pa- 

 pilhe, giving rise to bristles, are scattered over the body, with 

 a row of them above the abdominal feet. The triangular anal 

 plate is small, papilliform and prominent. The larva is dark 

 velvety purple, the base of the head being of a pale horn color ; 

 the body beneath is scarcely paler than above ; the spines are 

 pale livid on the basal half. They were full-fed and ready to 

 pupate July 17th. The head of the pupa is square in front. 

 On the prothorax are two subdorsal spines, and an elevated 

 mesial ridge on the mesothoracic ring, rising highest behind. 

 At the base of each wing is a sharp, conical, prominent papilla, 

 immediately succeeded by a broad, thin-edged dilatation, con- 

 stricted and appressed to the base of the abdomen ; this is the 

 internal angle of the wings. On the abdomen are two lines of 

 subdorsal sharp papilhie, one on each side. The wings extend 

 to the fifth abdominal ring, and from this point the abdomen 

 rapidly tapers to the tip. The surface of the body is wrinkled 

 with conspicuous black spiracles. Its general color is chest- 



