172 
LEPIDOPTERA IEDICA. 
Our description and figure of this species is from a male in the possession of 
Mr. W. Rothschild, taken in the Nam Hla Valley, Siam frontier, S. Shan States, at 
2500 feet elevation. Mr. H. Fruhstorfer (l.c.) records it from “ Than-Moi, 1000 feet, 
Kalao, taken in May and June.” The type specimen is stated to be from Tonkin. 
China and Japan Species. — Byasa Lama (Papilio Lama, Oberthur, Etudes Ent. ii. 
p. 15, pi. 3, fig. 1, ? (1876) ; id. iv. p. 43 (1879). Pap. Philoxenus subsp. Lama, 
Rothschild, Nov. Zool. ii. p. 266 (1895). Leech, Butt, of China, Japan, &c., ii. p. 
537 (1893). Habitat. W. and C. China,— Byasa Alcinous (Papilio Alcinous, Klug, 
Neue Schmett. Ins. Samml. Berlin, pi. 1, fig. $ $ (1836). De Haan, Verh. Nat. 
G-esch. Ned. p. 26— nee. pi. 9, fig. larva (1840). De L’orza, Lep. Jap. p. 11 (1869). 
Pryer, Rhop. Niphon, p. 4, pi. 5, fig. 3, ? (1886). Leech, lx. p. 539 (1893). 
Rothschild, l.c. p. 267-8 (1895). Syn. Pap. Spathatus, Butler, Ann. Nat, Hist. 1881, 
p. 139. Pap. hasmotostictus, Butler, l.c. p. 140. Habitat. Japan .—Byasa Mencius 
(Papilio Mencius, Felder, Wien. Ent, Mon. vi. p. 22, S $ (1862). Pap. Alcinous 
subsp. Mencius, Rothschild, l.c. p. 268. Habitat. China,—Byasa Plutonius (Papilio 
Plutonius, Oberthiir, Etud. Ent. ii. p. 16, pi. 3, fig 2, d (1876). Leech, lx. p. 541 
(1893). Pap. Alcinous subsp. Plutonius, Rothschild, lx. p. 271. Habitat. W. 
China,— Byasa Loochooana (Pap. Alcinous Loochooana, Rothschild, l.c. iii. p. 421 
(1896). Habitat. Okinawa, Loo Choo Islands. —Byasa Mansonensis (Pap. Alcinous 
Mansonensis, Fruhstorfer, Soc. Ent. 1901, p. 113. Habitat. N. Tonkin. —Byasa 
Nigricans (Pap. Bootes subsp. Nigricans, Rothschild, l.c. ii. p. 335, S (1895). Pap. 
Bootes, Leech, l.c. p. 551 (1893). Habitat. W. China. —Byasa dealbata (Pap. 
Janaka subsp. dealbatus, Rothschild, lx. ii. p. 336, S (1895). Habitat. W. China. 
Genus TROS« 
Pros, Barbutt, Genera Ins. Linne, p. 168 (1781). Kirby, Allen’s Nat. Hist. Butt. ii. p. 305 (1896). 
Papilio (part), Doubleday and Hewitson, Gen. D. Lep. i. p. 5 (1846). 
Menelaides (part), Hiibner, Yerz. bek. Schmett. p. 84 (1816). 
Papilio (group I. part), Rothschild, Nov. Zool. ii. p. 233 (1895). 
Imago. —Male. Forming elongate, triangular; apex convex, exterior margin 
very oblique and slightly waved, posterior margin short and almost straight; cell very 
long. Hindwing 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 ; antennas with a 
gradually thickened club. 
Larva. —Cylindrical, tapering towmrds each end; with a subdorsal and two 
