266 REVISION OF MAMESTEA — SMITH. 



ous admixture to the gray scales gives a suggestion of a pink flush 

 which has really no existence. The marginal regions are all darker 

 than the discal. 



' Mamestra orbiculata, sp. uov. 



Grayish fuscous, powdered with black scales. Collar, with an iin- 

 prominent transverse line. Primaries with basal line pale, not promi- 

 nent. T. a. line pale marked at costa, below this concolorous, marked 

 by geminate black lines, the outer only distinct, outcurved between 

 veins. T. j). line very distinct, narrow, pale, inwardly margined by a 

 narrow, black line, outwardly defined by the dark s. t. space. In its 

 course it forms a distinct, nearly right angle opposite the accessory cell, 

 then inwardly oblique, slightly sinuate to the hind angle. S. t. space 

 darker, emphasizing the irregular pale s. t. line, which is thrice quite 

 deeply angulated inwardly. A row of black venular marks also pre- 

 cedes this line. Terminal space powdered with white; this powdering 

 also more or less evident along the costal region. An interrupted dark, 

 followed by a pale, terminal line. Fringes concolorous. A somewhat 

 indistinct, median shade line, black on costa, outwardly angulate so 

 as to obscure the reniform inferiorly, then indistinct and fuscous to the 

 hind margin. A fine black basal longitudinal line joined to a spear- 

 pointed black-margined claviform. Orbicular oblong or oval, decum- 

 bent, black margined, pale centered, discolorous. Reniform moderate 

 upright, superiorly discolorous, pale yellowish, inferiorly irregularly 

 dilated, marked by a couple of irregular white dots variably placed. 

 Secondaries whitish basally, with an indefinitely bounded outer black- 

 ish fuscous marginal band. Fringes white, with a fuscous interline. 

 Beneath, white, with fuscous powderings, both wings with a broad, 

 outer line, beyond which there is a blackish shade to the margin. 



Expands 29 to SO-""^ (1.16 to 1.20 inches). 



Habitat.— Colorado (Bruce). 



A very distinct species. The distinct pale, angulated t. p. line, the 

 very distinct, unusually irregular s. t. line, and the discolorous ordi- 

 nary spots are not paralleled elsewhere in the genus. The genital 

 structure is very like that of brachiolum, but the tip of the harpes is 

 furnished with spinules, and the clasper is differently shaped. 



Two males from Mr. Bruce, one of them in the collection of the U. S. 

 National Museum. 



Mamestra auguina Grt. 



1881. Grt., Cau. Eut., xiii, 129; Mamesfra. 

 Dark ash-gray, powdery, median space usually somewhat darker, 

 median lines distinct, geminate. Basal line present. T. a. line out- 

 wardly convex, not strongly curved between veins. T. p. line rather 

 even, outwardly curved over reniform, then, with a deep inward curve, 

 narrowing the median space by one- half. S. t. line pale, irregular^ 

 sinuate, strongly marked below vein 2, where it is crossed by a dis- 



