CALIN AGA . — CETHOSIA. 
119 
this respect with Sikkim specimens of C. hudclha, Moore*. Specimens of 
this form from other localities have the whitish discal markings suffused 
with fuliginous. 
The other form of C. davidis, which is common at Chang-yang, Central 
China, where it is the sole representative of the species, but also occurs 
sparingly in Western China, is greyish with the whitish markings well defined ; 
the streaks and spots are often confluent, giving the appearance of a whitish 
insect with greyish marginal border and blackish venation. 
In both forms the female has the outer margin of all the wings rounder 
than in the male, but agrees with that sex in colour and markings. 
Oberthiir states that his figure of C. davidis Avas taken from a very worn 
example ; but if the darker portions of the wings were a shade heavier in 
tone the figure would then very well represent the form occurring in Western 
China, to which I have referred above. 
Genus CETHOSIA. 
Cethosia, Fabricms^ Illiger Magazin^ vi. p. 280 (1807); Doubleday, Gen. Diurn. Lep. i. 
p. 130 (1848) ; de Niceville, Butt. Ind. ii. p. 31 (188G). 
" Head rather narrow, clothed with hair. 
" Eyes oval, prominent. 
" Palpi slightly divergent, ascending, rising considerably above the forehead, clothed with 
appressed scales ; the first joint stout, curved ; second joint more than five times the length 
of the first, much swollen beyond the middle, smaller towards the apex, which is obliquely 
truncate, set in front with long erect setaj ; third joint slender, elongate, oval, about equal 
in length to the first. 
" Aiitennce about three fourths the length of the body, gradually clavate ; the club slender, 
rather pointed, grooved below. 
" TnoEAX oval, not robust; the prothorax small, but distinct. 
Fore triangular ; the costal margin and apex slightly rounded ; outer margin sinuate- 
dentate, not two thirds the length of the costa ; inner margin slightly sinuate, rather 
longer than the outer. Costal nervure stout, not extending much beyond the middle 
of the wing; subcostal, nervure slender, placed very close to the costal, five-branched, its 
first branch thrown off just before the end of the cell ; the first and second, and the third 
and fourth, branches about equally distant from one another ; the third rather nearer to the 
second than to the fourth. Discoidal cell not quite half the length of the wing. Upper 
discoceUular nervule almost wanting ; middle discocellular nearly straight, directed slightly 
inwards ; lower discoceUular twice the length of the middle one, directed first slightly 
* Cat. Lep. Mus. E. I. C. p. 163, pi. iii. a. fig. 5 (1857). 
