360 AMERICAN LEPIDOPTERA. 



AiiiatheM diiscata Smith. 



1907. Smith, Ann. X. Y. Ac. Sci., p. — , Orfhosia. 



I have quite a series of specimens from various localities in Mani- 

 toba — Brandon, Miniota, Winnipeg, Cartwright — and there are 

 many more in other collections under the name euroa. For the 

 latter determination I am responsible in most cases, because until I 

 had sufficient material to compare series, I believed this form to be 

 at most a local race. 



Dates of capture are June, August, September and October, and 

 a question remains whether the adult hibernates as is usual in this 

 genus, or whether there are two broods as indicated by the months 

 given. The period of flight is unusual for a member of this genus. 



The genital structure has been sufficiently described elsewhere, 

 and the points in which the species differs from its allies have been 

 brought out. 



Ainathes ralla Grote and Eobinson. 



1S68. G. and R., Trans. Am. Ent. Soc, i, 346, pi. 7, f. 49, Xanfhia. 



1874. Morr., Proc. Acad. Nat. Sci. Phil., 1874, 66 ^ ferrughioides. 



1875. Morr., Can. Ent., vii, 78 =^ ferrwiinoides. 

 1875. Lint., Can. Ent., vii, 78, an bona species. 

 1893. Smith. Bull. 44, U. S. Nat. Mus., 217, Orlhosia. 



1906. Hamp., Cat. Phal. B. M. Noct., vi, 490, pi. 107, f. 8, Amnihes. 



Differs obviously from all the other species in the series in the 

 rusty yellow colors of thorax and primaries which gives it that 

 casual resemblance to femiginoides that led Mr. Morrison and some 

 others to claim that it was merely a varietal form. 



The characters of maculation, color and male genital structure 

 have been already set out, and in the series before me there is very 

 little variation. 



General localities are the eastern and IVIiddle United States; my 

 own examples are from Claremont, N. H., September 2d ; Cohasset, 

 Mass., August loth (Bryant); "New York;" New Brighton, Pa., 

 September 1st (Merrick); Cranberry, North Carolina, in August; 

 the latter example from either Laurent or Wenzel. 



Ortho!<»ia iiiops Grt. 



1881. Grt., Bull. U. S. Geol. Surv., vi, 270, Orthosia. 



1906. Hamp., Cat. Phal. B. M. Noct., vi, 490. pi. 107. f. 9, Amathes. 



This the most local of all the species known to me, all the exam- 

 ples that I have seen having been taken by Dr. R. Thaxter at 

 Kittery Point, Maine, in September. One example to a collection 

 seems to be the rule, except at Cambridge, where there are several 

 in the Thaxter material. 



