1G8 LEPIDOPTEBA INBICA. 



Genus ORSOTRI^NA. 



Orsotricena, Wallengren, Kongl. Vet. Akad. Forh. xv. p. 79 (1858). ]\Ioore, Lep. of Ceylon, i. p. 22 

 (1880) ; Trans. Ent. See. Lend. 1880, p. 159. Semper, Eeisen Archipel. Pliilippeu. Lep. p. 44 

 (1886). 

 Mycalesis (Orcotriatna), Marshall and de Nice'ville, Butt, of India, etc. i. p. Ill (1883). 

 Mycalesis {sect, la). Distant, Ehopal. Malayana, p. 49 (1882). 

 Imago. — Foreiving comparatively short, exterior margin slightly oblique, the 

 apex and posterior angle convex ; costal vein only, in both sexes, swollen at the 

 base. Hinchoing somewhat arched at the base, anal angle convex ; first subcostal 

 branch emitted immediately before end of the cell ; discocellular long, slightly 

 oblique ; middle median also emitted before lower end of the cell. Male on the 

 upperside of the forewing, with a tuft of fine long hairs, arising from within the base 

 of and overlapping or enclosed within a narrow glandular pouch or fold situated above 

 the submedian vein ; and on the upperside of the hindwing, with a tuft of delicate 

 recumbent hairs situated above and below the base of the median vein. Eyes naked. 

 Antennce slender, short, with imperceptibly thickening club. 



Adult Oatbepillar.- — " Spindle-shaped, transversely rugose and clothed with 

 minute bristles ; head with two long setose spines pointed forward, and two caudal 

 spines." 



Cheysalis. — " Perpendicularly suspended, slender, and regular, except that the 

 head-case is produced into a long beak formed of two thin processes like split-straws." 

 (Davidson and Aitken.) 

 Type.—O. Medus. 



ORSOTRIiENA MEDUS. 



Wet-Skason Beood (Plate 58, fig. 1, la, b, (J ? ). 

 Fapilio Medus, Fabricius, Syst. Ent. p. 488 (1775). 

 Orsoiricena Medus, Moore, Trans. Ent. Soc. Lond. 1880, p. 160. Semper, Eeisen Archipel. Phihppen. 



Lep. p. 44 (188G). 

 Mycalesis Medus, Distant, Ehopal. Malayana, p. 49, pi. 4, fig. 8, <J (1883). Ehves, Trans. Ent. Soc. 



1888, p. 303. 

 Mycalesis {Orsotriaina) Medus, Marshall and de Niceville, Butt, of India, etc. i. p. Ill (1883). 

 Fapilio Hesione, Cramer, Pap. Exot. i. pi. 11, fig. C. D. (1775). 

 Mycalesis Hesione, Hiibner, Verz. bek. Schmett. p. 55 (1816). Hewitson, Journ. Linn. Soc. Lond. 



Zool. viii. p. 146. Butler, Catal. Satyr. Brit. Mus. p. 138 (1868); id. Catal. Fabrician Lep. 



B. M. p. 34 (1869). 

 Orsotricena Hesione, Wallengren, Kongl. Vet. Akad. Forh. sv. p. 80 (1858). 

 Papilio Doris, Cramer, Pap. Exot. iv. pi. 362, fig. C. (1782). 

 Fapilio Hamilcar, Herbst, Naturs. Schmett. viii. p. 73, pi. 193, fig. 3 (1796). 

 Mycalesis cinerea, Butler, Annals & Mag. Nat. Hist. 1867, p. 401, pi. 8, fig. 9. 



Imago. — Male and female. Upperside uniform dark umber-brown, without 

 markings except two slender wavy whitish-cinereous marginal lines and the trans- 



