RHOPALOCERA MALAY AN A. 215 



cell, and fourth bifurcating from the third ahuost midway between end of cell and apex of wing ; lower 

 median nervule emitted a little beyond middle of median nervure. Posterior wings broadly subovate ; costal 

 and outer margins convex, the last with a delicate tail-like appendage at apex of lower median nervule ; costal 

 nervure arched and extending to apex, first subcostal nervule emitted a little before the end of cell. Palpi 

 porrect, second joint long, thickly clothed with adpressed hairs, third joint very slender, about half the 

 length of second ; antenna3 with a somewhat suddenly formed, robust, apical clujj. 



Castalius is common to the Ethiopian and Oriental regions. In Africa and Asia it 

 probably extends throughout the tropics, but the number and distribution of its species cannot 

 be estimated at present with any degree of accuracy. 



1. Castalius rosimon. (Tab. XXII., fig. 20 2 .) 



Papilio Rosimon, Fabricius, Syst. Ent. p. 523, n. 341 (1775); Sp. Ins. p. 121, u. 511 (1781); Maut. Ids. 



p. 71, n. 672 (1787); Ent. Syst. iii. p. 349, u. 327 (1793U 

 Papilio Maimon, Pabr. Syst. Ent. p. 534, n. 395 (1775). 

 Papilio Clijton, Cram. Pap. Ex. i. t. 07, F, G (1779). 

 Papilio Coridon, Cram. Pap. Ex. iv. t. 340, C— E (1782). 

 Castalius Naxus, Hiibn. Verz. bek. Schmett. p. 70, n. 696 (1810). 

 Polyommatus Piosimon, Godt. Euc. Meth. ix. p. 058, n. 141 (1823). 



Lyca:na Rosimon, Horsf. Cat. Lep. E.I.C. p. 71, u. (1828); Snell. Tijd. Ent. xix. p. 152, n. 41 (1876). 

 Cupiclo rosimon, Druce, Proe. Zool. Soc. 1874, p. 100, n. 1 ; Snell. Tijd. Ent. xxi. p. 17 (1878). 

 Lampides rosimon, Wood-Mas. & de Nic. J. A. S. B. vol. l. p. 235, n. 41 (1881) ; de Nic. ibid. p. 51, n. 42 (1881 ). 

 CflsiaimsiJownow, Butl. Cat. Fabr. Lep. p.l62, n. 1 (1869); Trans. Linn. Soc. ser. 2, Zool. vol. i. p. 546, u. 1 



(1877); Moore, Lep. Ceyl. i. p. 83, t. 36, f. 2 (1881). 



Male and Female. Wings above pearly white, basal areas covered with bright bluish-green scales. 

 Anterior wings with the costal and outer margins broadly black, and with the following spots of the same 

 colour: — one at base of lower median nervule (almost obscured by the basal bluish coloration), one, disco- 

 cellular at apex of cell, and an irregular submargiual row of six spots, the uppermost of which is placed 

 above the upper discoidal nervule, and the fifth and sixth are fused and traversed by the lower median 

 nervule. Posterior wings with the costal margin (broadly) and two outer submarginal macular fasciie black, 

 and with the following spots of the same colour : — one between the subcostal nervules, another near apex of 

 cell, one or two basal and almost hidden by the bluish coloration, two near the inner submarginal fascia 

 and separated by the upper median nervule, and two placed a little above these and separated by the lower 

 median nervule. Wings beneath pearly white ; anterior wings spotted as above, but with a basal black 

 streak running along costal nervure to first subcostal nervule, the costa only narrowly black or fuscous, 

 and the outer margin with two submarginal rows of spots instead of the broad black margin as above ; 

 posterior wings spotted as above, the basal markings distinct, consisting of a basal streak and an oblique 

 row of four spots, the marginal spots near anal angle irrorated with bluish scales. Fringe alternately grey 

 and black. Body above blackish, beneath with legs more or less concolorous with wings. 



Note. — The female has the black margins to the upper surface of the wings broader than in 

 the male. 



Exp. wings, 3 and ? , 27 to 30 millim. 



Hab.— Continental India; N.W. Himalaya (Hocking— coll. Moore); Sikkim (de Nic). — Ceylon 

 (Thwaites— coll. Dist.).— Nicobar Islands; Nankowri (Wood-Mas. & de Nic). — Malay Peninsula ; Penang 

 (colls. Dist. & Godfy.) ; Malacca (Pinwill— Brit. Mus.).— Siam ; Chentaboou and Nahconhaisee (Druce).— 

 Java (Horsf.) ; Batavia (Snellen).— Celebes (Snellen). 



This is evidently a widely distributed species, and the habitats given above must 

 inadequately express its geographical distrilnition. According to Mr. Hutchison, as observed 



