172 LEPIDOPTERA I^'DICA. 



Our description and figure of this species is from a male in the possession of 

 Mr. W. Rothschikl, taken in the Nam Hla Vallej, Siam frontier, S. Shan States, at 

 2500 feet elevation. Mr. H. Fruhstorfer (I.e.) records it from " Than-Moi, 1000 feet, 

 Kahio, taken in May and June." The type specimen is stated to be from Tonkin. 



China and Japan Species.— Z?//asa Lama (Papilio Lama, Oberthiir, Etudes Ent. ii. 

 p. 15, pi. 3, fig. 1, ? (1876) ; id. iv. p. 43 (1879). Pap. Philoxenus siihsp. Lama, 

 Rothschild, Nov. Zool. ii. p. 266 (1895). Leech, Butt, of China, Japan, &c., ii. p. 

 537 (1893). Habitat. W. and C. China. — Byasa Alciiious (Papilio Alciuous, Klug, 

 Neue Schraett. Ins. Samml. Berhn, pi. 1, fig. c? 9 (1836). De Haan, Verh. Nat. 

 Gesch. Ned. p. 26— nee. ph 9, fig. larva (1840). De L'orza, Lep. Jap. p. 11 (1869). 

 Pryer, Rhop. Niphon, p. 4, pi. 5, fig. 3, ? (1886). Leech, I.e. p. 539 (1893). 

 Rothschild, I.e. p. 267-8 (1895). Si/n. Pap. Spathatus, Butler, Ann. Nat. Hist. 1881, 

 p. 139. Pap. hajmotostictus, Butler, I.e. p, 140. Habitat. Japan. — Byasa Menchis 

 (Papilio Mencius, Felder, Wien. Ent, Mon. vi. p. 22, c? ? (1862). Pap. Alcinous 

 subsj). Mencius, Rothschild, /.c. p. 268. Habitat. China. — Byasa Phitonius (Papilio 

 Plutonius, Oberthiir, Etud. Ent. ii. p. 16, pi. 3, fig 2, S (1876). Leech, I.e. p. 541 

 (1893). Pap. Alcinous siibbp. Plutonius, Rothschild, I.e. p. 271. Habitat. W. 

 China. — Bi/asa LoocJiooana (Pap. Alcinous Loochooana, Rothschild, I.e. iii. p. 421 

 (189G). Habitat. Okinawa, Loo Choo Islands. — Byasa Mansonensis (Pap. Alcinous 

 Mansonensis, Fruhstorfer, Soc. Ent. 1901, p. 113. Habitat. N. Tonkin. — Byasa 

 Xir/rieans (Pap. Bootes subsjh Nigricans, Rothschild, I.e. ii. p. 335, S (1895). Pap. 

 Bootes, Leech, I.e. p. 551 (1893). Habitat. W. China. — Byasa dealbata (Pap. 

 Janaka subsp. dealbatus, Rothschild, I.e. ii. p. 336, c? (1895). Habitat. W. China. 



Genus TROS. 



Tros, Barbutt, Genera Ins. Linne, p. 168 (1781). Kirby, Allen's Nat. Hist. Butt. ii. p. 305 (1896). 

 Papilio (part), Doubleday and Hewitson, Geu. D. Lep. i. p. 5 (1846). 

 Menelaides (part), Hlibner, Verz. bek. Schmett. p. 84 (1816). 

 Papilio (group I. pari), Rothschild, Nov. Zool. ii. p. 233 (1895). 



Imago. — Male. Forewiag elongate, triangular ; apex convex, exterior margin 

 very oblique and slightly waved, posterior margin short and almost straight ; cell very 

 long. Hindinng short anteriorly, produced posteriorly, exterior margin scalloped 

 and with a narrow tail at end of upper median veinlet ; abdominal margin not folded ; 

 basal area from the costa to below the median vein and its branches, thickly clothed 

 with fine long hairs. Body moderately stout ; apex of abdomen without valves ; 

 posterior tibia not incrassated, clothed with fine short spiny scales ; antennte with a 

 gradually thickened club. 



Larva. — Cylindrical, tapering towards each end ; with a subdorsal and two 



