THE CANADIAN ENTOMOLOGIST. 53 



then suppose all the dark margin behind the fascia gathered on the costal 

 margin, forming a velvety black spot so large that it touches the small 

 silvery spot above the fold behind the fascia ; in like manner, suppose the 

 anterior dark margin of the fascia gathered together in a velvety black 

 spot before the fascia beneath the fold ; then suppose the fascia widely 

 interrupted in the middle — and you have the variety. The costal part 

 of the fascia thus becomes the anterior silvery margin of a large velvety- 

 looking black costal spot, which, by its confluence with the silvery spot 

 above the fold, appears to be margined with silvery at that point, and 

 sometimes has a few silvery scales scattered through it ; and the dorsal 

 portion of the fascia becomes the hinder silvery margin of a large velvety- 

 looking black dorsal spot, which, by its confluence with the silvery spot 

 beneath the fold, appears to be margined with silvery at that place, and 

 sometimes contains a few scattered silvery scales. Except that the quantity 

 of black and silvery scales is increased somewhat, the insect does not differ 

 from the old form." 



But, as I find by specimens bred and captured since the above was 

 written, I have only described above the specimens which most nearly 

 approach the old form, and the variety is by no means a constant one. As 

 the fascia in the old form is a little oblique, so the anterior margin of the 

 costal spot is nearer to the base of the wing than the hinder margin of the 

 dorsal spot ; sometimes both spots are silvery margined entirely both before 

 and behind, and sometimes also within ; and in one bred specimen there 

 is no dorsal spot at all, but the dorsal margin from the base to the ciliae 

 is silvery. There are some other more minute differences which it might 

 be necessary to mention if one were describing a new species ; and per- 

 haps where the word " silvery " occurs above it would be more accurate 

 to write violaceous-silver)-. 



hamadrvas (Clem.) 

 H. Bassettella Clem. 



The only variation that I have observed in this species is in the ground 

 color, which ranges from sulphur to almost brick-red. ft is abundant in 

 all the Texas collections, and though originally described from Connec- 

 ticut, I have never met with it in Kentucky or in Colorado. 



I' I LET USA. 



P. plutclla Cham. 



The statement in the description of this species that the white streak 



