PACKARD.] ZOOLOGY MOTHS OF COLORADO. 557 



Clisiocampa. — The larva and cocoons of this genus occurred, but none 

 of the moths. 



Euleucophceus tricolor, Pack. (Rep. Peab. Acad., 1872), (PI. 2, Fig. 12). — I 

 reproduce in part the description of this most interesting and excep- 

 tional form, with the hoi)e that observers may find it in Colorado. Ouly 

 one specimen is in existence, having been received from New Mexico 

 by Mr. Henry Edwards, who loaned it to me for study. It is closely 

 allied to Hemileuca Juno and Diana. The body, including the anten- 

 uge, is larger, while the wings are much saialler than usual. The hind- 

 wings are shorter and rounder than in Hemileuca. instead of being 

 dark-brown, with white bands, as common in the allied forms, the wings 

 are of a faded whitish, with a broad, median, grayish-brown band occupy- 

 ing the middle third of the fore-wing, and inclosing a white, irregular, 

 lunate, discal spot. It has a generally faded appearance, adapting it for 

 concealment while resting on the dry, parched ground, and it will be 

 interesting to learn whether its exceptional style of coloration adapts it 

 for a life on the deserts of New Mexico. Its occurrence in Southern 

 Colorado is to be looked for. 



Hemileuca Diana, n. sp., one 2 (Fig. 13). — This species is structurally 

 near H. Juno, Pack., from the border of Arizona and Sonora; the wings 

 being opaque and with much the same shape, though the apices of 

 both pairs are rather more acute, and the veins are much less promi- 

 nent. It also approaches H. lo in the style of coloration ; the prothorax 

 being white, and in having a broad white band common to both wings. 

 It cannot be the female of H. Juno, as the markings are so different 

 from the two males in my possession. It is also very different from 

 Color adia Pandora, Blake, which is quite a different genus from Hemi- 

 leuca. 



Body and wings dark opaque-blackish-brown. Head dark. Fore 

 femora tufted with deep rich vermilion. Prothorax white; whitish 

 hairs mingled with those of the rest of the thorax, and forming a long 

 dull-whitish fringe on the basal half of the inner edge of the fore-wings 

 and along the entire hinder edge of hind-wings. Two rust-red tufts on 

 each side of hind end of thorax, just as in H. Maia. Abdomen as in 

 9 H. Maia, black, with whitish hairs, giving it a grizzly appearance, but 

 with numerous rust-red hairs near the tip, not present in H. Maia. 

 Both wings dull blackish-brown ; the veins scarcely apparent beyond 

 the middle of the wing, with a broad white band from 0.10-0.15 inch wide, 

 common to both wings, and not quite reaching the costal edge of both 

 wings. On the fore- wings, the band does not quite reach the inner edge, 

 ending on the internal vein. Discal dot a small, transparent, lunate, pale- 

 yellowish spot half as large as in H. Maia or Juno, surrounded by a 

 large, round, black area, which nearly cuts the white band in two. 

 Beyond the white band, the wing is dusted with white. Hind-wings 

 with the discal dot obsolete, but opposite its site an excavation iu the 

 white band. Beneath as above ; the discal dot on the fore wings rather 

 deeper yellow than above. 



Length of body, 0.95 inch; of fore wings, 1.05 inches; expansion of 

 wings, 2.10 inches. Plum Creek, September 12 (Lieutenant Carpenter). 



From H. Juno, to which it is nearest allied, it differs in the white pro- 

 thorax, the small diskal spot, the conspicuous white band common to 

 both wings; and from H. Maia it differs in the opaque, more pointed, 

 and triangular wings, the narrower white band, and smaller discal dot, 

 none being present on the hind-wings. From Harris's H. Hera, which 

 has not yet been rediscovered since Harris described it, it seems to dif- 

 fer very materially ; H. Hera being described as pale-yellow, with two 



