LYCAENID#. CHILADES. 89 
genus is a very poor one, and can only be maintained for convenience, as, as far as I can 
discover, it does not differ structurally in the slightest degree from the genus Zycena, Fabricius. 
As far as I know, two species only have been placed in this genus. One, C. /aius, Cramer, 
occurs almost throughout India and Ceylon, but not in the Malay Peninsula, and is found 
again in Formosa and China. In this species seasonal dimorphism of a very marked charac- 
ter obtains, the specimens flying in the winter having a prominent fuscous nebulous patch on the 
underside of the hindwing, which is entirely absent from the specimens that fly in the rains. 
The rains form of C. dais is a very ordinary looking ‘‘ blue,” though the winter form of it is 
so peculiar from the presence of the patch mentioned above. The other species, C. ‘rochilus, 
Freyer, has a wide range, occurring in South Africa, North and South Tropical Africa, Extra- 
Tropical North Africa, South-East Europe, Asia Minor, Persia, Aden, almost throughout India 
and Ceylon, but not in the Malay Peninsula, as far asis known, reappearing however in Java, 
Sumba, Sambawa, and Australia. C. ¢vochiles in both sexes is glossy fuscous above, in the hind- 
wing with a marginal row of round black spots, the anal ones of which are sometimes crowned 
with orange, and all on the underside very prominently black with greenish silvery metallic 
scales, and often crowned with orange. It is a very small butterfly, perhaps the smallest but 
one occurring in India. 
I have been so fortunate as to discover the transformationg of both the species of Chilades, a 
description of them will be found under the description of the species. The larve and 
pupee of both species are of the usual Lyczenid shape, and the former are attended by ants. 
Eey to the species of Chilades. 
A. Maleand female more or less blue on the upperside, the marginal spots on the underside of the 
hindwing never crowned with orange or ochreous, or sprinkled with metallic-greenish scales. 
672. C. Larus, India, Ceylon, Burma, China. 
B. Male and female entirely dull black on the upperside without any blue coloration, the marginal 
spots on the underside of the hindwing crowned with orange or ochreous, and sprinkled with 
metallic-greenish scales. 
673. C. TROCHILUS, Europe, Africa, Asia Minor, Arabia, Persia, throughout India, Ceylon, 
Burma, Java, Sumba, Sambawa, Australia, 
672. Chilades laius, Cramer. (PLATE XXVI, Fics. 168, $ WET-SEASON FORM ; 
169, ¢ DRY-SEASON FORM). 
Papilio lajus, Cramer, Pap. Ex., vol. iv, p. 62, pl. cccxix, figs. D, E, female (1780); Polyvommatus laius, 
Horsfield and Moore, Cat. Lep. Mus. E.I. C., p.21, n. 7, pl. xii, figs. 1, Zarva; 1a, pupa (1857); id., 
Moore, Proc. Zool. Soc. Lond., 1878, p. 702; Lycena laius, Butler, Cat. Fab. Lep. B. M., p. 1715 
n. 19 (1869); Chilades /aius, Swinhoe, Proc. Zool. Soc. Lond., 1885, p, 133, n. 62; idem, id., l.c., 1886, 
Pp. 427, n. 52; id., Doherty, Journ, A. S. B., vol. lv, pt. 2, p. 133, n. 166 (1886); Hesferia cajus, 
Fabricius, Ent. Syst., vol. iii, pt. 1, p. 296, n. 126 (1793); Polyommatus cajus, Godart, Enc. Méth., vol, 
iX, p. 701, n. 242 (1823); P. varunana, Moore, Proc. Zool. Soc. Lond., 1865, p. 772, pl- xli, fig. 6; 
idem, id., Proc. Zool. Soc. Lond., 1878, p. 702; Chilades varunana, id., Lep. Cey., vol. 1, p. 77, pl. xxxvs 
fig. 3, male (1881); idem, id., Proc. Zool. Soc. Lond., 1882, p. 245; id., Swinhoe, I. c., 1885, p. 133, n. 
63; idem, id.,I.c., 1886, p. 427, n. 51; id., Wood-Mason and de Nicéville, Journ. A. S. B., vol. lv, pt. 2, 
p. 365,m. 111 (1886) ; Polyommatus kandura, Moore, Proc. Zool, Soc. Lond., 1865, p. 772, pl. xli, figs A 
Semale ; Zizera kandura, Swinhoe, Trans. Ent. Soc. Lond., 1885, p. 341, n. 24; Lycena brahmina, Felder, 
Reise Novara, Lep., vol. ii, p. 279, n. 350, pl. xxxv, figs. 15, 16. /emzale (1865). 
HABITAT : Coromandel Coast (Cramer); Hong-Kong, Formosa, China (Butler) ; N.-W:- 
Himalayas; Bengal; Ceylon; Hainan (J/oore) ; Quetta; Poona; Mhow (Szwinhoe); Cachar 
( Wood-Mason and de Nicéville) ; Calcutta (de Nicéville) ; Bengal (Felder). 
EXPANSE: ¢,°90 to 1'20; 2, 1'00 to 1°25 inches,* 
Wet-season form. 
DESCRIPTION : ** MALE. UPPERSIDE, 40¢h wings dull purple-blue, exterior margins with 
a slight pale brown border. Hindwing with two or three ill-defined blackish pale-bordered 
“ Mr. Moore gives the expanse of his P. Aanduraas1'5 inches; this must be a mistake, the specimen 
figured measuring 1°05 only. 
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