North-American Sphinges and Bombyces. 317 
Drepanulide. 
Drepana, Schrank. 
29. Drepana arcuaia. 
Drepana arcuata, Walker, Cat. Lep. Het. v. p. 1164. n. 8 (1855). 
Washington. 
Ceruridz, fam. nov. 
Cerura and allies, with their Drepanulidiform larve, must 
be separated from the typical Notodontide: their larve are 
broad in front, with a distinct angle or hump at the fourth 
segment, fourteen legs and a forked pair of projecting tails, 
from which, when annoyed, bright-coloured filaments are 
exserted. The cocoon is hard, and the imago very woolly. 
Crrura, Schrank. 
30. Cerura bicuspis ? 
Bombyx: bicuspis, Borkhausen, Eur. Schmett. iii. p. 380. n. 141. 
Mendocino County, California. 
Notodontide. 
Napata, Walk. 
31. Nadata Doubleday?, var. oregonensis. 
Differs from typical N. Doubledayi, Packard, in the dis- 
tinctly greyer tint and greater prominence of the markings on 
the primaries; the lines across these wings are also much 
more divergent, the inner line being considerably more ob- 
lique, Hxpanse of wings, 3 48 millim., 9 60 millim. 
Rouge River, Oregon. 
It is possible that this may be specifically distinct ; and 
therefore I give it a distinctive name; but it does not seem 
to differ so evidently as D. Doubledayi and D. gibbosa, though 
these two were placed together by Walker. 
Hepialide. 
STHENOPIS, Packard. 
32. Sthenopis anceps. 
Hepialus anceps, H. Edwards, “ Papilio,” p. 36 (1881). 
California. 
