JOHN B. SMITH. 259 



inner line a little denticulate on the veins, outer vague and diffuse, 

 even. S. t. line concolorous, a little irregular, marked by a narrow 

 blackish preceding shade which tends to become broken and is only a 

 little better marked on costa. A series of small black terminal lunules. 

 Median line fairly obvious, narrow, extending from costa obliquely 

 through the lower half of reniform so as to darken the outer border 

 and lower part of spot, thence close to and parallel with t. p. line to 

 the inner margin. Orbicular concolorous, vaguely defined by a slightly 

 paler ring. Reniform kidney-shaped moderate in size, vaguely defined 

 by a somewhat paler ring, except where the median shade darkens 

 and emphasizes it. Secondaries snow-white in both sexes ; in the male 

 with a narrow smoky terminal line, in the female with a vague, dif- 

 fuse, narrow sub-marginal band. Beneath white, almost immaculate, 

 a little dusky powdering along costa of secondaries, a tendency to a 

 discal spot and an extra-median line in primaries. 

 Expands, 1.60-1.65 inches = 40-41 mm. 



Hab. — Denver, Ft. Collins, Poncha Springs, Colorado, in 

 July. 



Two males and one female in good condition and very 

 much alike. These also are old specimens, received from Mr. 

 David Bruce and Prof, C. P. Gillette many years ago, and 

 they have, until recently, been associated with E. medialis 

 in my collection. That species, however, has the antennae 

 of the male very slightly serrate and fasciculate, while in 

 poncha the lateral processes are long and in the nature of 

 short branches or pectinations. In general the maculation 

 is very like that of truva ; but the ground lacks all trace of 

 reddish or carneous gray and, in the female, the secondaries 

 are white, as are those of the male. There are other differ- 

 ences in the course of the lines, and especially the median 

 shade that may be noted by comparing the descriptions ; but 

 the ground color and sexual differences will serve most 

 readily for that purpose. 



Euxoa truva n. sp. 



Ground color reddish-gray, with more or less black powdering. 

 Front with a narrow black transverse line below the middle, sides of 

 palpi dusky. Collar with a reddish line below the tip and a single line 

 near the margin of patagia. Primaries with all the lines present, but 

 much relieved and more or less fragmentary. Basal line geminate, 

 blackish, broken, outwardly bent on the median vein. T. a. line 

 geminate, the component parts about equally developed, tending to 



TRANS. AM. ENT. SOC.XXXVI. (33*) NOVEMBER, 1910. 



