96 zygtENid.e and bombycid.^ 



Secondaries bright orange, with seven rounded deep blue spots 

 margined with black, arranged in two rows ; the median row con- 

 sisting of three, and the submarginal row of four spots. In the median 

 row the first spot is on the discal vein, the second is greatly larger and 

 lies across the base of the fourth median nervule, the third is the size of 

 the first and lies on the internal vein. The outer row consists of a small 

 spot on the costa, a large one on the first median nervule, a similar spot 

 on the fourth median and a smaller one on the internal vein. Fringes 

 orange. 



Beneath, the markings of the primaries are reproduced, but the basal 

 third is largely reddish, and the white bands are all reddish on the 

 margins of the wings. Secondaries as above, except that the markings 

 are dull black. 



Expanse of ivings, ? 2.90 inches. Length of body, i.oo inch. 



Habitat. — New York, (Doubleday, Harr. Coll.) Canada, (Saund.) 

 Vancouver's Island, (H. Edwards.) California, ( Boisduval.) Alaska, 

 (Dall.) 



Larva. — Saunders (Proc. Ent. Soc. Phil., vol. 2, p. 28) has the fol- 

 lowing notes on the larva as it hybernates for the winter : ' ' Length, 

 three-eighths of an inch. Head black, body dark brown with transverse 

 rows of tubercles, from which spring dense tufts of intermingled white 

 and black hairs. It completes its growth in the Spring and enters the 

 chrysalis state late in May or early in June. Like the Caja of Europe, 

 it feeds readily on the common garden lettuce. " 



While closely allied to the European E. caja with which it has been 

 confounded by European writers, it can be readily distinguished, as 

 pointed out by Dr. Harris (Ins. Mass., p. 246, 1841,) by the white 

 edging of the prothorax and patagia, which appears to be a constant 

 colorational difference. Harris gives the color of the posterior wings 

 as yellow ochre, suggesting the possibility of the occurrence of specimens 

 with orange or red hind wings. In two specimens from Vancouver's 

 Island, from which the foregoing description was drawn, the posterior 

 wings are all bright orange. Harris also calls attention to the absence 

 of black spots on the sides of the abdomen in E. Americana, which I 

 am unable to verify, owing to the defective condition of the body parts 

 of the specimen before me. Both these specimens (?) are much 

 larger than any specimens of ^. caja in my collection, and the posterior 

 wings are more ample and less acute at the apex. Morris (Lep. N. Am., 

 p. 336) gives the color of the spots on the hind wings as black, which 

 must be a mistake, as they are distinctly blue in both species. 



