824 [September 



paler antennae and narrower bands on the anterior wings. I refer the 

 student to y\r. Saunders' paper for the description of several slight 

 varieties of this species. Exp. 1.05 to 1.08 inches. 



ffab. Canada West. (Coll. Ent. Soc. Phil.) 



Until Kirby in 1837 described, without figuring, his CalUmorpha 

 jparthenice, no second species nearly allied in coloration and ornamen- 

 tation to Arctia virgo Linn, had been suspected by authors. Since 

 Kirby wrote, this species has been sought for by Entomologists in a 

 form of A. virgo, in which the series of spots on the posterior wings 

 show a difference of size or position. I have elsewhere stated that I 

 consider A. partlumice of authors as identical with A. virgo Linn., and 

 since rearing imagos of both sexes from larvae kindly sent me by Mr. 

 Wm. Saunders as the larvae of A. parthenice, I see no reason for alter- 

 ing my opinion. While I have little hesitation in referring Arctia 

 parthenice of Messrs. Saunders and Packard to A. virgo Linn., I am 

 not so certain that Kirby's C. parthenice should be similarly referred. 

 This author's description of the anterior wings equally applies to A. 

 virgo Linn, with A. Sauiu/ersii Grote, and it is on the anterior wings 

 more especially that I have seized upon a character which I believe is 

 specific and will readily distinguish the latter species, viz : the linearity 

 of the stripes on the veins. Kirby's description of the posterior wings, 

 as well perhaps as the given expanse, would indicate A. Saundersii as 

 the species intended, for in all my specimens the discal spots are absent 

 and there are but five terminal spots, the expanse being 1 J to If inches, 

 Kirby giving the latter measurement, while the discal spots are always 

 present in my specimens of ^. virgo Linn., and but very few expand 

 less than 2 inches. 



While, therefore, there is a probability that A. Saundersii was the 

 species intended by Kirby, the unsatisfactory diagnosis, which contains 

 no comparative allusion to Linnaeus' species, renders it a matter of un- 

 certainty, and I prefer to refer Kirby's description to A. virgo L., and 

 to retain the name, under which I have described it, for the second 

 smaller species. I find that it is a sexual distinction of the males of 

 A. virgo L. and A. Saundersii Grote, that the antennae are lighter 

 colored and the bands on the anterior wings broader. I give the fol- 

 lowing description and synonymy of A. virgo L., figuring the ordinary 

 male of the species : — 



