OF NORTH AMERICA. 181 



The typical form of this species is readily distinguished from all its 

 congeners by its dark color ; while the albino form spoken of by east- 

 ern Entomologists, but which I have never seen, may be distinguished 

 from E. colldris, with which, as I have stated under that species, it has 

 probably been confounded, by the different structure of the two insects, 

 as well as by the coloration of the body parts. This albino approaches 

 much more nearly to E. oregone?tsis, though the latter is probably dis- 

 tinct. The knowledge of its preparatory states can, however, alone 

 definitely decide the question. Dr. Packard states that Mr. Shurtleif 

 raised an insect which corresponded well with Dr. Fitch's H. collaris 

 from a brood of E. egle, but if the insect subsequently described in 

 these pages as E. collaris, and of this I have little doubt, as Dr. Fitch's 

 description is exactly filled, the limit of the term "species" will have 

 to be greatly extended, as the two insects are structurally different, and 

 present a greater variation than do alypia octomaculata and Langtonii, 

 Arctia virgo and Satmdersn, and other insects whose specific difference 

 has been accepted. 



2.-EUCH.ffi;TES OREGONENSIS. N. s. (PI. 8, tig. 7 $ .) 



$. — Head bright yellow ochre, clypeus white. Eyes black. 

 Palpi dusky at tips, yellowish at the base. Antenuce white, pectinations 

 black. Prothorax dusky white, yellowish at the sides. Thorax and 

 patagia dusky white, paler than prothorax. Abdomen slender, bright 

 yelloiv ochre above, terminal segment and beneath whitish. A dorsal 

 series of small velvety black spots, and a lateral row of similar spots 

 of much reduced size. Legs whitish, dusky above ; tibiaj and tarsi of 

 anterior pair blackish ; coxa; of the same pair dusky, margined with 

 yellow. 



Wings above dirty white ; anterior pair somewhat the darkest, with 

 paler veins. Fringes silky white. 



Beneath as above, except that the interspaces of the primaries are 

 inclined to smoky, especially near the costa. ? . unknown. 



Expaiise of wings, 1.60 inch ; length of body, 0.60 inch. 



Habitat. — Oregon. (Coll. Stretch.) 



For the type of this species, I am indebted to the kindness of Lord 

 Walsingham, who captured the single specimen above referred to, in 

 Oregon, during his recent trip to the Pacific Coast. In form it ap- 

 proaches nearest to E. egle, from which it differs not merely in the 

 color of the wings, but also by the slenderer abdomen, and the bright 



