Studies on Life-hislory of Bombycine 3Ioths. 73 



abdominal legs are all pale whitish, like the body. All the setifer- 

 oiis tubercles are white like the body. 



This larvra is entirely unlike the 4th stage of normal H. tessellaris 

 (Abbot and Smith). 



The egg and mature larva of Euchetes collaris Fitch. 



The larva (?) occurred at Brunswick, Me., on the dogbane 

 (Apocynum androssemifolium), August 16th. On the 25th it spun 

 a cocoon. 



August 29th the pupa was still whitish. The moth appeared in 

 the breeding-box on May 27th succeeding. For some eggs I am 

 indebted to Mr. H. Meeske. 



Egg. — Diameter 0.7 mm. Of the usual hemispherical shape, the 

 dome moderately high, and at the apex slightly raised. The shell 

 in thin, glassy, and perfectly smooth under a ^-iuch objective, with 

 no traces of pits or polygonal areas. 



Freshly-hatched larva. — (Described from several alcoholic speci- 

 mens.) Length 2 mm. Head scarcely wider than the body, pale 

 whitish flesh-colored; the eyes situated on a dusky patch; with a 

 few scattered dusky hairs. The body is cylindrical, whitish, with 

 pale umber-brown piliferous warts. Prothoracic shield rather large 

 and broad, with a pale median suture, partly dividing it into two 

 parts ; each half bearing two piliferous warts in front, and three 

 behind. The 2d and 3d thoracic segments with suboval dorsal warts 

 each bearing two unequal black hairs, the longest ones nearly twice 

 as long as the body is thick. The subdorsal and lateral warts each 

 bear a shorter single white spinulated hair. Along all the abdomi- 

 nal segments are two additional small hemispherical approximate 

 dorsal warts, each bearing a single dark hair ; these, in addition to 

 the dorsal two-hair-bearing tubercles of the 2d and 3d thoracic 

 segments. On each side of these abdominal segments not bearing- 

 legs, are two piliferous warts below the lateral ones. All the 

 ai)dominal legs have a longitudinal large dusky patch on the out- 

 side, which is also present on the anal legs. The longest hair arises 

 from the 1st abdominal segment, and these two are twice as long 

 a.s the body is thick. All the hairs are spinulated as usual in the 

 family. The abdominal legs each bear but four ungues. 



Full-fed larva. — Length 22 mm. The body is cylindrical, rather 

 thick, pale whitish, and completely concealed by beautiful long 

 silky woolly slate-gray hairs ; the longer hairs being considerably 

 Annals N. Y. Acad. Sci., VIII, May, 1893.— 6 



