254 AMERICAN LEPIDOPTERA. 



tinctly by its more sharply defined maculation, smaller size 

 and lack of that peculiar rough, powdered appearance, char- 

 acteristic of the larger form. The male antennae have the 

 segments well marked, but not drawn out into processes, 

 and the bristle-tufting is distinct. 



Euxoa vertesta n. sp. 



Ground color a very pale luteous, powdered with gray and smoky 

 brown ; male on the whole a little darker than the female. Head rather 

 uniformly powdered ; palpi paler. Collar with a narrow and rather 

 distinct dusky line interiorly, and a more diffuse, broader and less dis- 

 tinct line across middle. Thoracic disc and patagia powdery, but 

 without definite maculation. Primaries with all the normal maculation 

 present ; but powdery, diffuse and not contrasting or even well defined. 

 Basal line geminate, very close to base, dark gray. T. a. line gemi- 

 nate, broken, a little irregular, but as a whole nearly upright to the 

 internal vein (1), where it makes a long outcurve to inner margin. 

 T. p. line geminate, very narrow, very even, well outcurved over the 

 reniform, and a very little incurved below. A rather well defined 

 median shade line crosses the anterior portion of median space, out- 

 curved over the orbicular and reaching the internal margin with t. a. 

 line. S. t. line of the pale ground, with a well marked " W " on veins 

 3 and 4, relieved against the darker terminal space and preceded by 

 sagittate dusky marks, which indent the paler s. t. space, giving it a 

 curiously dentate appearance. A series of black terminal lunules. 

 Fringes lined with yellow and smoky. Claviform a small blackish 

 loop with yellowish centre. Orbicular small, round, of the pale 

 ground. Reniform upright, a little constricted, yellowish, with a gray 

 central filling. Secondaries white, with a series of smoky terminal 

 lunules. Beneath white, powdery along costa and at apex. A series 

 of dusky terminal lunules and a small discal spot. The female that I 

 associate with the male above described lacks the pale shading in the 

 s. t. space, and the dentate appearance, although the course of the 

 lines otherwise agrees. The claviform is long and dark filled ; the 

 orbicular is elongate ovate and dark filled ; the reniform is larger and 

 dark filled, though of the same general shape as in the male. The 

 secondaries are whitish, tinged with smoky. 



Expands, 1.20 inches = 30 mm. 



Hab. — Stockton, Utah, September 8, Mr. Spalding. 

 > Only one male and one female, differing somewhat as 

 already noted, but which I nevertheless consider as identical. 

 The female has a little the appearance of a small orthogonia, 

 but the male does not recall that species in the least. The 

 antenna in the male is only slightly serrate and fasciculate. 

 The tarsal joints in both sexes are rather conspicuously 

 brown banded. 



