104 BULLETIN 190, UNITED STATES NATIONAL MUSEUM 



Male. — Antennae bluish black when perfect, rufous when abraded, pec- 

 tinations dense but short. Labial palpi black, slightly touched with brown. 

 Head black, a coarse brush on top. Collar, thorax, abdomen, anal 

 appendage, and legs black with metallic reflections. Forewing opaque, dull 

 orange ; costa, vein 10, and cubitus shaded with dull black ; discal mark 

 and inner margin with reddish scales ; fringes brownish black. Hindwing 

 opaque, dull orange ; cubitus and veins 2, 3, and 4 shaded with dull black. 

 A vitreous, round or slightly oval area confined between veins la and lb 

 at base of wing. Wings similar above and beneath. 



Female. — Antennae simple, orange. Labial palpi black, slightly mixed 

 with orange. Head black, a coarse brush on top, mixed black and orange 

 in color. Anal tuft black, narrow, centrally inverted and with a shorter 

 hair pencil at each side. Otherwise like the male. 



Expanse : Male 30 to 32 mm., female 34 to 36 mm. 



Distribution. — Rocky Mountain regions, 4,000 to 8,000 feet, Colorado, 

 Utah, Nevada, New Mexico, Arizona. 



Type. — Male, in the United States National Museum. 



Remarks. — This species, aside from its predominating normal orange 

 form, is subject to color variations in both sexes varying from orange 

 to deep black. 



ALCATHOE PEPSIOIDES ATRA Engelhardt 



Plate 24, Figure 147 



Alcathoe pepsioides. atra Engelhardt, Bull. Brooklyn Ent. Soc, vol. 20, p. 158, 

 1925. — McDuNNOUGH, Check list of the Lepidoptera of Canada and the United 

 States of America, pt. 2, No. 8687, 1939. 



That the color variety atra is conspecific with pepsioides has been 

 established from long series of specimens reared from material collected 

 in the same locality and at the same time. One lot from Jemez Springs, 

 Sandoval County, N. Mex., 6,000 feet, produced 50 or more examples 

 of both sexes composed of the normal orange- winged form and numerous 

 others displaying a gradual color transition from orange through brown 

 and brown-black to deep black and lustrous blue-black. Other series 

 with color variations of the same kind are from Fort Wingate, McKinley 

 County, N. Mex., 7,000 feet, July 1922 (John Woodgate) ; Escalante, 

 Carfield County, Utah, 4,000 feet, July 28, 1933 (Engelhardt) ; St. 

 George, Washington County, Utah, July 20, 1941 (Engelhardt) ; Grand 

 Junction, Mesa County, Colo., 5,000 feet, August 12, 1933 (Engelhardt) ; 

 Trinidad, Las Animas County, Colo., 5,000 feet, July 10, 1929 (Engel- 

 hardt) ; Oak Creek Canyon, Coconino County, Ariz., 6,000 feet, August 

 1898 (Snow) ; Alpine, Brewster County, Tex., 5,000 feet, July 20. 1929, 

 orange form only (Engelhardt). 



