244 EDWARD NORTON. 



ourrent nervure, thence to one on the lower third of the second ner- 

 vure, and thence to a wide buHa in the middle of the third nervure, 

 from which two distinct lines radiate to the niars>;in ; a second line can 

 sometimes be discerned across the lower part of the third submarii,inal. 



Antennae 9-articulate, the two basal joints distinct, rather globose, 

 remainder sometimes less distinct, third often as long as both fourth 

 and fifth, the remainder gradually diminishing in length and thick- 

 ness; terminal joint short, somewhat conic. Antenna) seldom longer 

 than head and thorax. 



Head broad, rugose, generally polished and shining, with a suture 

 more or less deep on each side of ocelli from the antennjt; to summit, 

 and an enclosed basin below the lower ocellus; nasus deeply notched; 

 mandibles bidentate ; joints of maxillary palpi somewhat equal in 

 length, third joint of labial palpi short. 



Bodij short and stout; abdomen broad, hardly longer than thorax. 



IjP'Js simple, with two short unequal spines at apex of tibia), the an- 

 terior pair bifid. 



The larvjB are generally twenty-two-footed. They arc slug-like in 

 appearance and are often covered with a viscid slime. Tliey are all 

 naked, but some are covered with whorls of spines, some with whorls 

 of fine! hair, and some cover themselves with patches of white woolly 

 matter. They generally undergo their transformations in the earth, 

 but in some cases form a double cocoon, which remains in the ground. 



Hartig has formed the genus into four sub-sections, which are given 

 below, w;th the addition of another secttfem which seems called for by a 

 .species of this country. The names which he gave to these sub-sec- 

 tions, founded on the form and habit of their larvte, do not all seem to 

 correspond with their larva characters in this country, and have not 

 been adopted. 



The species of this genus arc small and are mostly of inconspicuous 

 colors, and in m.iny cases are so much alike that it is difficult to distin- 

 guish tliem. Fortunately they seem to vary little from their types. 



Tithle to aa^iist in jimling the Sjoecies. 



ficclion I. Lanceolate cell petiolate. 



Trihe I. Unler wings without mid He cell. 



Color black, sliouldei's and buck red, inner claw tooth 



Luge 1, vitis. 



Color black, shoulders and Oi'.ck red. inner <;law tooth 



minute 2, inhabilis. 



Color rulous, head aud pleura black ;{, capitilis. 



