310 imOPALOCERA MALAYANA. 



mai-fins (most broadly so at apex), and with a dark fuscous spot at outer angle; posterior wings also 

 sparingly speckled with fuscous. Body and legs more or less concolorous with wings. 



Exp. wings, <? , 54 to 5G millim. 



Hab.— Malay Peninsula ; Penang (Biggs— coll. Dist.) ; Perak (Kunstler— Calc. Mus.) ; Sungei Ujong 

 (Godfery— coll. Dist.). 



This species is allied to the /. aiicxihia, Hiibn., a species found in Continental India, and 

 to the I. latifasciatus, Butl., described from Burma. Several species of this group of the 

 genus have a very similar facies, if examined superficially, but the extent of the black apical 

 area to the anterior wings, with the size and shape of the orange-coloured fascia, will generally 

 alone afford a key to differentiation. 



Genus APPIAS. 



Appias, Hiibner, Verz. bek. Scbmett. p. 91 (181G) ; Butl. Cist. Ent. vol. i. p. 49 (1870); Moore, Lep. Ceyl. 



vol. i. p. 134 (1881). 

 Catophai/a, Hiibu. Verz. bek. Scbmett. p. 93 (1816) ; Moore, Lep. Ceyl. vol. i. p. 131 (1881). 

 Hipusci-itia, Geyer, iu Hiibn. Zutr. iv. p. 16 (1882); Moore, Lep. Ceyl. vol. i. p. 133 (1881). 

 Tackyris, Wall. Trans. Ent. See. ser. 3, vol. iv. p. 361 (1867). 

 Huphina, Moore, Lep. Ceyl. vol. i. p. 136 (1881). 



Anterior wings subtriangular, costal margin arched and convex, the apex either pointed and 

 subacute or rounded, outer margin slightly concavely sinuate, inner margin slightly sinuate. Costal 

 nervure extending to a little beyond end of cell ; first subcostal nervule emitted beyond middle of cell, 

 second rather nearer to first than to apex of cell, third and fourth bifurcating near apex of wing, fifth 

 at about one-fourth beyond end of cell ; upper disco-cellular nervule concavely bent, much shorter than 

 the lower, which is more or less oblique ; median nervules wide apart, first and second a little closer 

 together than second and third ; submedian nervure waved and bent inwardly at base. Posterior wings 

 more or less elongately subovate, costal margin oblique, posterior margin rounded and very obscurely 

 waved. Costal nervure almost reaching apex of wing ; first subcostal nervule emitted at about one-third 

 before end of cell ; upper disco-cellular nervule oblique and slightly bent inwardly ; lower oblique, slightly 

 bent outwardly ; upper median nervule from end of cell, first and second median nervules with their bases 

 about half the distance apart as those of second and third ; submedian nervure slightly curved outwardly. 

 Body moderately robust ; pronotum hairy, less moderately slender ; palpi with the apical joint long and 

 pointed, the second joint clothed with long hairs beneath. Legs moderately slender. 



Mr. Wallace drew particular attention to the anal valves of the males as being " elongated 

 and provided with a tuft of long and stiff' hairs at each side of the base beneath,"* and as 

 peculiar and characteristic of his genus Tachyris — a character which, though applicable 

 to that restricted genus, does not possess universal application in the more comprehensive 

 genus Appias as here used. 



This is a very extensive genus, the study of which has not been simphtied by recent 

 minute generic subdivision. It is found throughout the tropical portion of the Old World, and 

 is not uncommon. Mr. Wallace describes most of the species he observed as flying swiftly, and 

 "many of the males assemble in troops about wet places and on river margins, after the 

 manner of the genus Callidryas." \ 



* Trans. Ent. Soc. ser. 3, vol. iv. p. 302 (1867). t Ibid. 



