LEPIDOPTERA . 
213 
P. Ocelli absent, p. 308. 
LyMANTRIIDjE. 
PP. Ocelli present, p. 293 NoctuiDjE. 
OO. Antennae simple, p. 293. NoctuiDjE. 
MMM. The subcosta of the hind wings 
united with the radius for a considerable 
distance (/.*., 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... ARCTHDiE. 
OO. Ocelli absent, p. 324..L1THOSIID/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 wing. With all 
the moths included under this head 
and under the preceding N, vein Vi 
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.ZYG/ENIDjE. 
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 3 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. Drepanid.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 
