188 ZYG^NIDiE AND BOMBYCIDiE 



yellow head. Were it not for these latter differences, it might be con- 

 sidered an albino of E. egle, though the typical form of that species is 

 yet unknown from the Pacific Coast. 



3.-EUCH5;TES COLLARIS. (PI- 8. fig- 5. 5 •) 



Hyphantria collaris , Fitch, 3d Rept. Ins. N. York, p. 265. (1856.) 



Tanada antica, Walker, Cat. Lep. B. M. 



Spilosoma collaris, Morris, Syn. Lep. N. Am., p. 314. (i860.) 



Ardia sciurus, Boisduval, Ann. Soc. Ent. Belg. , vol. 12, p. 79. 

 (1868.) 



6 . — White. Head pale yellow ochre. Eyes black. Palpi pale 

 ochre beneath ; above and at the tips, black. Antennae white, pectin" 

 ations black. Prothorax and patagia yellow ochre, the latter whitish 

 behind. Thorax white. Abdomen slender, whitish, with the ouier 

 half oi each segment above yellowish. A dorsal series of black, seg- 

 mentary spots, and a double lateral series of similar spots, the lower 

 row being the smallest. Legs white above, dusky beneath ; coxse of 

 the anterior pair, yellow ochre. 



Wings pure milk white. Basal half of the costa of the primaries 

 yellow ochre, most intense near the base of the wing. 



Beneath, as above ; except that the discal area of the primaries is 

 smoky ; while all the primaries, and the costa of the secondaries, have 

 a yellowish tinge. 



$ . — Similar to 5 , but somewhat smaller, and wanting the yellow 

 color at the base of the primaries. 



Expanse of wings. — 3 . 1.60- 1.80 $ 1.4 0-1.70 inches ; length of 

 body, 0.60, 0.65 inch. 



Habitat. — Mississippi (Fitch). Pennsylvania, (Strecker). Canada 

 (Saunders). California (H. Edwards). 



The specimen from which the accompanying figure was drawn, was 

 taken by my friend H. Edwards, Esq., near Yosemite Valley, California. 

 The insect was not uncommon in that locality, but apparently local. 

 Specimens differing in nothing but somewhat inferior size, were for- 

 warded from Pennsylvania by H. Strecker, Esq., (in response to a re- 

 quest for the white variety of E. egle, ) with the remark that it was not 

 uncommon in certain places, but that he had never seen typical speci- 

 mens of E. egle in that neighborhood. E. egle (type) is yet unknown 

 in California. From these circumstances and a comparison of the 

 insects, I am satisfied that the I/, collaris o( Fitch has been confounded 



