LEPIDOP TERA. 213 



P. Ocelli absent, p. 308. 



LYMANTRIIDjE. 



PP. Ocelli present, p. 293 NOCTUID^E. 



OO. Antennae simple, p. 293. NocxuiDvE. 



MMM. The subcosta of the hind wings 



united with the radius for a considerable 



distance (i.e., for one fifth or more of the 



length of the discal cell). 



N. The subcosta and radius of the hind 

 wings united for a considerable distance, 

 but usually separating before the apex 

 of the discal cell. 



O. Ocelli present, p. 317. ..ARCTIIDJE. 

 OO. Ocelli absent, p. 324..LlTHOSHD^E. 



NN. The subcosta and radius of the hind 

 wings united into a single vein (Fig. 

 399), or at most with their tips separate 

 near the apex of the vving. With all 

 the moths included under this head 

 and under the preceding N, vein V ( 

 of the hind wings is present and is 

 joined to radius at or near the apex of 

 the discal cell ; care should be taken 

 not to mistake this vein Vi for radius, 



p. 326 Z YG^ENIDvE. 



HH. Frenulum absent; the humeral angle of the hind 

 wings largely expanded and serving as a substitute 

 for a frenulum. 



I. Cubitus of both wings apparently four-branched, 

 due to the fact that both the second and third 

 branches of media (V 2 and V 3 ) are joined to it. 



J. Small moths, with slender bodies, and with the 

 apex of the fore wings sickle-shaped ; humeral 

 veins absent, p. 289. DRSPANI^/E. 



JJ. Moths of various sizes, but with robust bodies! 

 and with the apex of the fore wings not sickle- 

 shaped ; hind wings with humeral veins, p. 

 359 LASIOCAMPID^E. 



II. Cubitus of both fore and hind wings apparently 

 three-branched, due to the fact that only the third 

 branch of media (V 3 ) is more closely joined to it 

 than to radius. (The moths included in this 



