AMERICAN LEPIDOPTERA. 199 



Six examples, in fair to good condition, are at hand. The spe- 

 cies runs somewhat larger than those heretofore described and is 

 recognizable by the peculiarly mottled appearance and tendency to 

 a reddish tint. In the latter character it approaches decepta; in the 

 others it resembles antica and postica more closely. Edwardsii is 

 very distinct from all the others by its uniform tinge on which the 

 maculation is not relieved. Antica, postica and nova are close allies, 

 but I believe good species. With a series at hand for comparison 

 the differences are marked, and the male genitalia serve to empha- 

 size these differences. These structures were figured for edwardsii 

 and decepta in the Proc. U. S. Nat. Mus., xii, pi. 22, figs. 18 and 19. 

 Those of the other species referred to are herewith given on pi. iii, 

 figs. 1-12. 



Sir George F. Hampson has called my attention to the fact the 

 Mamestra fuscolutea is a Trichoclea in structure and must be referred 

 to that genus. The fact was verified too late to include the results 

 of gen italic study here. 



Tamiocampa Columbia Sm., Proc. U. S. Nat. Mus., x, 472, 1887. 

 This species was described out of the Neumogen collection from 

 specimens taken by Capt. Geddes in 1884. The material was some- 

 what unsatisfactory, and the generic reference was doubtfully made. 

 In the revision of Tteniocampid genera, Proc. U. S. Nat. Mus., xii, 

 1889, the relationship of the species to Mamestra was recognized, 

 but the balance of characters seemed then to point to Tceniocampa. 

 Recently, Mr. Dod sent me from Calgary a series of specimens col- 

 lected in July, whose relationship to Mamestra meditata was at once 

 apparent, but the species was marked as distinct. In looking over 

 the collection of the U. S. Nat. Mus., I recognized in the typical ex- 

 ample of T. Columbia the species sent me by Mr. Dod. A study of 

 the genitalia, which were compared with fig. 5, pi. xxiii, Proc. U. 

 S. Nat. Mus., xii, proved the identification correct and makes it 

 necessary to transfer the species to Mamestra. It must be M. Colum- 

 bia hereafter, and in the arrangement the form must stand next to 

 meditata. 



The series of twelve examples now before me shows a considerable 

 range of variation ; not only in general color, but in the distinctness 

 of the maculation. The normal rusty Tseniocampid brown predomi- 

 nates, and the range is from a decidedly yellowish shading to a very 



TRANS. AM. ENT. SOC, XXIX. JUNE, 1903. 



