OF NORTH AMERICA. 13 



BOMBYCID.E. 

 ARCTIINJE. 

 Qeuus ARCTIA. Schrank. 



Fore wings with tlie subcostal nervure having two marginal nervules 

 from near the end of the cell, and with a long narrow costal cell formed 

 between the second marginal and subcostal vein, and extended a little 

 beyond the origin of the post-apical, or without 

 this cell. The subcosto inferior nervule and the 

 discal vein arise at a common point, and toward 

 the apical portion of the wing is given off the post- 

 apical and apical nervules. The median vein is 

 four-branched, the posterior nervule being very 

 remote from the others. Hind wings broader than 

 the fore wings, as long or rather longer; neuration as usual in the 

 family. 



Head small, rather sunken in thorax, hairy, and with ocelli. Front 

 narrovir and hairy. Eyes small. Antennse in the S shortly pectinated, 

 in the ? serrated, and sometimes slightly pectinated. Labial palpi 

 porrected, hairy and exceeding the clypeus by about one half their 

 length; the third joint subacute, nearly or quite as long as the second 

 joint. Tongue with slender filaments, as long as the anterior coxa?. 



Body thick. Thorax covered with thick hair. Patagia rather large, 

 more or less overreaching the vertex. Breast rather hairy. Legs rather 

 stout, with all the femora hairy. Anterior tibiae longer than the last 

 joint of tarsus, with tibial spur concealed; the posterior tibiaj having 

 four moderate spurs. 



Clemens, Proc. Acad. Nat. Sci. Phil., p. 526. (i860.) 



