27 



broad flat scales of tlie thoracic vestitiire would serve to separate 

 Cossiis from Comadia. We have examined the European s])ecies 

 aicstnim and thrips and find tliat the former species could well be in- 

 cluded in this genus, whereas the latter has more affinity to cosstts 

 both in structure of antennae and vestiture of thorax. 



SVNOrSlS OK SPEClliS 



Wings without black markings. 



(a) Wings almost uniform white manfredi. 



(b) Wings marbled with pale brown hcnrici. 



Wings irrorate with black. 



(a) Black markings beyond cell, extending from origin of Ciii to beyond 



cross-vein bcrllwldi. 



(b) Only faint traces of markings beyond cell edivardi. 



C. HlilJTIIOl.Dl drt. (I'l. \', fig. ().) 



llyf'oftia bcrllwldi Grote, Bull. Brook. Ent. Soc, HI, 45 (1880); Neumoegen & 

 Dyar, Jour. N. Y. Ent. Soc, 1, p. 33 (181)3) ; id. Jour. N. Y. Ent. Soc, 

 II, p. 165 (1894); Rivers & Dyar, Psyche Vlll. p. 10 (iSy?) (/(irr<i) ; 

 Holland, Moth Book, p. 379, PI. XII, fig. 2. 



"$ 9 Silvery gray, shaded with fuscous gray. A blackish streak at base, 

 below the subcostal vein. Median vein narrowly blackish, the blackish shade 

 becoming diffuse outwardly between the median ncrvules. A faint dotted line 

 at the extremity of the ncrvules before the fringes, which are faintly interrupted 

 with fuscous. Head and thora.x fuscous gray. Secondaries gray; beneath 

 washed with fuscous. The preapical fuscous dots at the extremity of the sub- 

 costal veins are repeated beneath. Length of primary, 17 mm. 



Colorado. Mr. B. Neumoegen." 



This species varies consideral)ly in color and uuuUiugs ; our spe- 

 cimens from Arizona are very dark, showing very little trace of silvery 

 gray or of the dark shade between the ncrvules ; other specimens from 

 Colorado are largely suffused with silvery gray on the primaries. Two 

 specimens, one from N. Mexico, are very small, expanding only 27 

 mm. ; they may prove to be a new species. Larval stages described in 

 Psyche VIII, p. 10. 



Hab., Colorado. N. Mexico, Utah, California, Arizona. 



In Coll. Barnes. 20 S S , 15 9 9 from Redington, Ariz.; Palmer- 

 lee, Ariz.; Soi:th Cal. (May) ; Durango, Colo.; Glenwood Spgs., Colo. 

 (June. July) ; N. Mexico; Provo, Utah. 



