422 LYC-ENID-SI. 



rounded ; termen convex : tornus angulated, distinct : dorsum 

 slightly convex, nearly straight ; cell not quite half length of wing ; 

 veins 3 and 4 from lower apex of cell ; vein 7 from a little before 

 upper apex of cell ; vein 8 arched, terminated at apex of wing. 

 Antennae not quite half length of fore wing ; club long, gradual, 

 slightly blunt at apex ; eyes smooth ; palpi porrect or subporrect, 

 densely clothed anteriorly with scales but not fringed, third joint 

 long, aciculate, bare ; body comparatively slender. 



In venation and structure this genus cannot be separated from 

 Tarucus and in fact is linked to it even by coloration through 

 Castalius ananda, de Niceville, a slightly aberrant form. 



Key to the forms of Castalius.* 



A. Upperside : ground-colour J deep purple ; $ 



fuscous C. ananda, p. 423. 



B. Upperside: ground-colour both sexes white; 



fore wing with narrow costal and broader 

 terminal edgings on inner side of which 

 towards apex some quadrate black spots ; 

 bases of wings shot with iridescent light 

 blue C. rosimon, p. 424. 



C. Upperside : ground-colour black. Fore wing : 



a very broad obliquely transverse white band 

 that extends from "the middle of dorsal 

 margin almost to vein 6, with a short out- 

 ward extension above vein 3. 



a. Underside fore wing : an outwardly oblique 



very short clavate streak from base not 



extended to the costal margin C. decidia, p. 429. 



b. Underside fore wing : an outwardly oblique 



broad black streak from base to costal 

 margin. 

 '. This streak straight, not curved, reaches 



costal margin about the middle C. roxus, p. 428. 



b'. This streak not straight, bent at a right 

 angle before it reaches costal margin 

 just before the middle C. elna, p. 430. 



c. Underside fore wing : with two outwardly 



oblique broad parallel bands from base 

 to costal margin. 



a'. Upperside fore wing : medial obliquely 

 transverse white band very broad, 

 edged inwardly on both sides with 

 dark blue ; wing from base outwards 

 with iridescent light blue suffusion . . C. elhion, p. 426. 

 V. Upperside fore wing : medial obliquely 

 transverse white band narrower, not 

 edged with blue ; wing from base 

 outwards with a beautiful iridescent , ^ Jt . 

 light blue suffusion . \ a etht > ra 9 e 



I airavatt, p. 427. 



* Does not include C. manluena, Felder, which is unknown to me. 



