18S7.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 351 



large irregular wart. In addition to these there is a narrow subventral 

 wart on each side, and two large ventral ones on each of the legless 

 joints. Head polished black with a few black hairs. Thoracic legs^ 

 polished black, bat pale at the joints inside; prolegs black outside, flesh- 

 colored within and at extremities. Stigmata not perceptible. Largest 

 in the middle of the body. Average length 0.90, greatest diameter 0.15 

 inch." 



Food i)lant peach. Spins a slight cocoon of white silk, changing to 

 a pupa of a purple-brown color, finely and thinly punctured, and ter- 

 minating in a horizontally tlattened plate which is furnished with 

 numerous yellowish-brown curled bristles. The moth issues from this 

 chrysalis during the fore part of June. 



C. vestalis Pack.,Pr. E. S. Ph., iii, 108, 1864, Callimorpha ; Stretch, Z. & B., &l=fal- 

 vieosta; Grote, New List, var. lecontei. 

 conscita Wlk., C. B. M. Het., 32-377, 1865, Tanada; G. & R., Tr. A. E. S., ii, 85 = 

 lecontei; Stretch, Z. & B., 62. 



Head very pale yellow, antennae very pale brown. Thorax and abdo- 

 men white, immaculate, legs pale fulvous. Primaries white, usually 

 immaculate, often with the costal and outer margin a little dusky. 

 Secondaries and underside pure white. 



Expands 1.30-1.50 inches = 33-37°^™. 



Sa&ifrti.— Canada, is'ew York, Iowa, Eastern, Northern, Middle, and 

 Western States. 



This has been referred as a synonym of fulvicosta directly, and of 

 lecontei indirectly, and it certainly is neither the one nor the other. It 

 might possibly have been referred as a variety of militaris, but even 

 this I do not believe, for I have never seen a specimen of this form with 

 the internal margin dusky, nor, on the contrary, have I ever seen any 

 specimen of militaris in which this dusky internal margin was not 

 present. 



In addition to the superficial characters, however, the genitalia show 

 a decisive difference, and resemble those of clymene very closely while 

 diftering markedly from militaris. The superior angle is drawn out and 

 somewhat acutely rounded. Inferior angle conically produced, rounded 

 at tip. A comparison of the figures on plate — will serve to show the 

 differences 



The larva of this form has not been described. 



The foregoing species treated in detail are all in the Museum collec- 

 tion, and most of them in several specimens. The belief has been held 

 so long that these species were varieties merely, that it will seem an 

 extremely radical revision of the genus. However, though not a " split- 

 ter" by any means, I cannot avoid the conviction that all the forms 

 noted by me are, without exception, good species. I hope that those 

 who may disagree with me will try to prove me in the wrong by careful 

 breeding. 



