NORTH AMERICAN LEPIDOPTERA. 347 



This little species is recognizable by its size alone as well as its re- 

 semblance to cibalis in the prominent s. t. shade. The genitalia are 

 unlike those of the other species ; the harpes are long and narrow, 

 the tip oblique and somewhat rounded, inwardly fringed with spinules 

 The clasper is corneous, and consists of a rather strong, moderately 

 long and slightly curved hook or process, the base of which is trace- 

 able to the base of the harpe. 



Group ATRICOLLARIS. 



The salient feature of the species referred to this group is the 

 black longitudinal streak or shade of the primaries ; the median 

 lines are lost, the maculation is linear, the ordinary spots are indefi- 

 nite — all as in the preceding groups, but an entirely different appear- 

 ance is given by the longitudinal black shading, which in atricoUaris 

 extends from base to outer margin through the cell, and in grisei- 

 collis from the reniform outward. The latter species is not known to 

 me in nature and may not be as close an ally of atrieollnris as Mr. 

 Grote considers it. 



The genus Copihadena has been proposed for atricoUaris, which in 

 the narrower wings and different type of maculation seemed to have 

 a fair basis. Mr. Grote has suppressed the genus, however, and 

 perhaps with justice. 



O. atricoUaris Harr., Buff. Bull. 1874, ii, 273, Homohadena ; Morr., Can. Eiit 

 1875, vii, 91, Copihadena: Grt., Buff. Bull. 1875, iii, 73. Oncocnemis ; Bull. 

 Geog. and Geol. Surv. iii, 117, Oncocnemis ; Pap. 1880, i, 34, Oncocnemis. 

 Head, thorax and primaries gray, with fuscous shadings and powderings. Pri- 

 maries with all the transverse lines lost, or faintly marked on costa only; a 

 prominent black longitudinal shade band through the centre of the wing from 

 base to outer margin, forming the most obvious and characteristic feature of the 

 maculation; a small white patch at extreme base. Claviform distinct, black 

 ringed, paler filled, somewhat obscured basally by the dark shade. Orbicular 

 narrow, elongate, fused with the small upright reniform ; the spots faintly out- 

 lined in fuscous, more or less obscured by the longitudinal shade; a series of 

 terminal, black interspaceal lines cutting the otherwise concolorous fringes 

 Secondaries pure white, in the male with a narrow terminal line only, in the 

 female with an indefinite fuscous outward shading. Beneath whitish, powder3% 

 the primaries with a smoky outward shading. Head blackish powdered, with 

 an inter-antennal white line. Collar with a distinct black line at base, above 

 which is a distinct white line, the tip fuscous. Exp. 1.10—1.15 inch. ; 27—29 mm 



Hab. — Texas, Arizona. 



The species is common, and is at once recognizable by the marked 

 black longitudinal shade. 



