85 



8^ [NoVEMBEa 



Bomhyx Laocoon Stoll, Sup. to Cramer, p. 179. PI. 42. fig. 2. (1787). 

 Phalczna imperatoria Smith, N. H. Lep. Ins. Ga. p. 109. Tab. 55. (1797). 

 Eacles imperatoria Hubn., Verz. p. 153. (1816). 

 Cerntocampa imperialis Harr., Cat. Ins. Mass. p. 72. (1835). 



Westw. Edit. Driiry, I. p. 17. Pi. 9. figs. 1, 2. (1S37). 

 Dryocampa imperialis Harr., Rt. Ins. Mass. p. 290. (1841). 



Third Edit. fig. 190. 197 larva. (1862). 

 Duncan, Nat. Libr. xxxii. p. 158. PL 17. fig. 1. (1845). 

 Morris, Synopsis Lep. N. Amer. p. 230. (1862). 



Mass., (Coll. Harris.) Mrs. Bridirham has taken several of the larvie 

 t'roiii the white pine at Seekouk, 11. I., early in September. 



EUCHRONIA* nov. gen. 



Front of the head broadly subtriangular, spreading pilose. Joints of 

 the antennae short, a little serrated beneath, with broad pectinations, 

 each joint being provided with two pairs of pectinations, of which the 

 second is nearly obsolete. Eyes small, sunken. Foramina large and 

 conspicuous when .the head is denuded. Mandibles obsolete, repre- 

 sented by a slight elevated line curving inwards towards the narrow 

 linear mouth. The maxillfe form the membranous rid'>-es diverointr 

 from the under side of the mouth. Mentum and labium obsolete. The 

 palpi consist of two small elongated cylindrical tubercles, with a few 

 long scattered scales. Thorax short and round. Fore wings scarcely 

 longer than the body, one-half as long as broad ; costal margin straight, 

 rounding at the apex • outer margin very oblique. 8rd and 4th sub- 

 costal nervules arise farther out than the 1st median, and the discal 

 area is produced outward at their origin, and made narrower by the 

 angulated base of the 1st median. 



Secondaries reach nearly to the tip of the outer margin. Discal 

 nervules situated beyond the middle of the wing ; the subcostal and 

 median nervules being short. Wings sparsely covered witli narrow 

 subtriangular scales, laid on more thickly at the base and along the 

 costa of the wings, while the middle area is partially translucent. An 

 irregular dark patch surrounds the narrow linear transparent discal re- 

 gion. An irregular light translucent broad mesial b;ind crosses both 

 wings alike. The fore tibiae are densely pilose. Tarsi thickly spined 

 beneath ; ungues long and slender. 



~:j — _ 



^ *'Ey, Kpo'voj Saturn. 



