Lepidojotera of the Khasia Hills. 
71 
Genus Kalmina, Swinh. 
1195. K. och^acea, Swinh., Trans. Ent. Soc. Lond., 1891, 
p. 481, pi. 19, fig. 3. 
Common. 
Genus Pleurona, Walker. 
1196. P.falcata, Walker, xxxv., 1564 (1866). 
Common. 
Genus Chilkasa, Swinh. 
1197. C.falcata, Swinh., P. Z. S., 1885, p. 854. 
Pleurona perhamata, Hampson, Faun. Brit. Ind. 
Moths, ii., p. 549 (1894). 
Cherra Punji ; three examples. Hampson has sunk 
this genus under Pleurona, being guided by venation 
only, and has, consequently, renamed the species. If 
other characters are not to be recognized in genera, 
hundreds of proper genera recognized by lepidopterists 
could be sunk. And, indeed, in this rule he is himself 
not consistent, haviug erected several genera on charac- 
ters other than those of venation : his genus Floccifera, 
for instance (p. 281), is identical in venation with Leii- 
cania, and is erected by him (and very properly, so I 
think) because of the peculiar formation of the antenn93, 
legs, and tufts on the abdomen. In the genus Chilhasa 
the differences are far greater : the insect is differently 
shaped to Pleurona, antennge of male are fasciculated, 
and with very long setae ; in the other they are ciliated, 
and without the setas. In Chilhasa the fore and hind 
tibiae are fringed with very long thick hair, the mid tibiae 
with immense tufts of hair; in Pleurona the legs are 
without either. I feel sure, under these circumstances, 
that the two genera will be pronounced by all lepidop- 
terists as abundantly distinct from each other. 
Genus Ommatophora, Guen. 
1198. 0. luminosa (Cram.), Pap. Exot., iii., pi. 274, 
fig. D (1780). 
Common. 
Genus Spirama, Guen. 
1199. 8. retorta (Cram.), Pap. Exot., ii., pi. 116, fig. r 
(1777). 
Common. 
