76 BULLETIN 48, UNITED STATES NATIONAL MUSEUM. 



posterior line narrow, dusky, accoinpaiiied outwardly by a paler, 

 broader, equally even pale line, the lines varying ]n general course 

 from an even out(;urve to an even, not strongly marked, bisinuation. 

 Subterminal line vague, paler, often punctiform, and frequently in great 

 part lost; preceded by a vague darker shade, which is often broken 

 into blotches. A series of obscure terminal dark marks. There is an 

 obscure, indefinite upright median shade, which is outwardly diffuse 

 and slightly darkens the outer portion of the median space. Orbicular 

 small, round, yellow, often wanting. Keniform narrow, upright, yel- 

 lowish, with or without black dots at the extremities, sometimes 

 entirely black. Secondaries gray to smoky, immaculate or with faint 

 traces of median and subterminal lines. Beneath somewhat paler, 

 coarsely powdered, with traces of a discal lunule, and the two usual 

 transverse lines. 



Expanse of wings, 2(1 to 31* mm. = 1.05 to 1.30 inches. 



IlAniTAT. — (41enwood Springs, Colo., August and September. 



Six specimens, equally divided as to sex, are before me, all from Dr. 

 William Barnes. 



The species has on close study all the markings found in B. fiavi- 

 punctalis, so far as the primaries are concerned, and of this species I 

 was at first inclined to consider it an extreme variety. Closer study 

 shows that it is altogether a slighter form, with the outline of E. 

 sobrialis riither than R. fJavi2)unctctlis, and the wings as much drawn 

 out and pointed. The wings are uniformly i)owdered, and the trans- 

 verse i)Osterior line is almost obsolete. On the secondaries the median 

 l^ale line is entirely lost, and in fact the wings are sometimes entirely 

 immaculate. Finally, the palpi are much longer, and in the male are 

 not at all recurved, but rigidly obli(jue. Its relations are thus in 

 reality with 11. sohritili.s and Ii. larraJis rather than with R. Jiariimnc- 

 talis, to which the character of the maculation refers it. 



Genus HYPEMULA, Grote. 



1876. Grote, Cauadiaii Eutouiologist, VIII, 27. 

 The eyes are naked, large, globose. Front with a pointed, scaly 

 tuft. Tongue strong, moderate in length. Falpi long, Hattened, 

 upcurved and curving backward, much exceeding the vertex; second 

 Joint much tlie longest. The scaly clothing is somewhat loose and 

 directed ui)war(l and l)ackward; on the terminal Joint it is truncated or 

 cut off at ti]), making the Joint in outline somewhat hatchet-sliai)ed. 

 In tlie male the ])ali)i are a very little longer than in the female. 

 Antenna^ situated on the vertex, moderate in length, in the female 

 with single small lateral ciliations. In the male the Joints have moder- 

 ately long curved and slender lateral bristles, and on the underside of 

 the shaft are little tubercules arranged in two rows, giving rise to small 

 tufts of hair. Ocelli present, close to tlui (•om])ound eye and near to 



