126 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



One 9 . The female is much larger than the <? ; the fore wings are broader, dark gray, 

 with a brownish tint extending from the discal spot to the inner margin; the veins are more 

 or less tawny. The costal and apical region is hoary. The basal line is narrow, being one-third 

 as wide as in <f , becoming nearly obsolete before reaching the costa, the angle it makes in the 

 <? being obscure; it is very indistinctly continued along the base of the wing to the thorax. 

 The extradiscal line is about one-half as wide as in the <? , and the marginal dark gray shade 

 is much wider than in the S . The hind wings differ from those of the c? in being dusky white ; 

 in having a whitish extradiscal line, the margin broadly shaded with dark gray. A faint discal 

 discoloration. Fringe snow white, becoming dusky on the inner angle. Underside of fore 

 wings gray, with a vinous tinge; fringe dusky whitish; veins vinous reddish. The discal spot 

 and the two lines faintly reproduced. Hind wings beneath dusky white; extradiscal line 

 whitish; margin of wings dusky; fringe whitish. 



Of this species Euleucophaeus lex Druce is evidently a synonym. [Dr. Dyar thinks this 

 synonymy is impossible.] 



For a pair of this fine moth in a perfectly fresh state of preservation I am indebted to 

 [Mr. O. C. Poling, who states that the species is fairly plentiful in the Santa Catalina Mountains, 

 Ariz., where it appears in February, March, and April.] 



Geographical distribution. — This well-marked species seems to be confined to the region 



about Prescott, Ariz. 



HEMILEUCA OLWUE (Cockerell). 



Plate XXIV, fig. 4; LII, fig. 8; LX, fig. 9. 



Bemileuca sororia race olivix Cockerell, Psyche, p. 252, 1898. 



Imago. — Five <? . A very pale cream-colored species with a decidedly faded out 

 appearance. Fore wings, longer, more produced toward the apex; in shape as in E. tricolor, 

 but slightly less subfalcate and much paler, with no dark scales, and not so wide as in E. norba, 

 and hue much paler; veins not ochreous. Head in front shaggy, pale ochreous, concolorous 

 with the femora and breast, the scales on the vertex long and shaggy and of the same pale 

 gray as the thorax in front. Thorax either entirely pale olive-gray or with shorter reddish hairs 

 intermixed. Wings of both pairs of the same uniform faded olive-gray hue, almost whitish or 

 cream-colored; costa of fore wings nearly straight; slightly arched toward the apex, which is 

 a little more produced and rounded, than in E. norba, but just as in E. tricolor, though the 

 wing has not quite so subfalcate an outline as in E. tricolor, being slightly wider. Basal fine 

 broad, white, diffuse, situated two-thirds of the way from the base of the wing to the discal 

 spot, and not bent on the costa. Extradiscal line white, diffuse, not so near the outer edge 

 of the wing as in E. tricolor, more oblique and less undulating and diffuse than in E. norba. 

 The discal spot differs from that of E. norba and tricolor in being shorter, broader, and more 

 curved or kidney-shaped than crescentiform. Fringe of wings of both pairs concolorous with 

 the rest of the wings. Hind wings of exactly the same hue as the fore wings; a very faint 

 linear discal spot; no traces of whitish lines above or beneath. Under side of fore wings; 

 costal region ochreous, and the veins on the outer half of the wing ochreous, but from their 

 base to the discal spot the wing is bathed with roseate, becoming dusky beyond the discal 

 spot, which is much curved and distinct. Extradiscal line very faint, dusky. Hind wings as 

 above, but very faintly roseate at base. Abdomen rather bright brick or madder red, especially 

 on the end, being nearly of the same color as in E. norba; thorax and abdomen beneath pearly 

 dusky gray and femora of the same hue, but the tibiae and tarsi subochreous. 



Expanse of fore wings, <? 55 mm. 



Length of fore wing, t? 25 mm. 



Breadth of fore wing, c? 13 mm. 



Hind wings, length, <? 20 mm. 



Hind wings, breadth, t? 15 mm. 



