198 



Fig. 51. Appia* hippo, 

 venation. 



of more or less stiff hairs below. 



PIEUID-E. 



of cell, upper discocellular therefore 

 absent ; middle discocellular concave, 

 in typical Applets equal to lower dis- 

 cocellular, in other forms shorter ; the 

 lower discocellular concave : vein 8 

 absent, 9 out of 7, the fork closer or 

 even much closer to apex of wing than 

 to apex of cell; veins 10 and 11 free, 

 10 always from before apex of cell. 

 Hind wing more or less broadly pear- 

 shaped ; veins 1 , 1 to 8 present. An- 

 tenna* about half length of fore wing 

 or a little longer ; club well-marked and 

 flattened, but more or less gradual; 

 palpi slender, third joint long; eyes 

 naked ; abdomen in <5 with anal brushes 



Key to the forms of Appias. 



A. Upperside : light orange, darker orange, or crim- 



son ; veins more or less defined with black. ... A. nero, p. 202. 



B. Upperside : white, sometimes tinged with pale 



yellow, never orange or crimson'; veins in $ 

 only, sometimes defined with black. 

 a. Fore wing : veins 5 and 7 approximated at base ; 

 middle discocellular more than half length of 

 lower discocellular. 



a. Upperside fore wing : outer black margin or 

 area not produced inwardly in interspace 3. 

 fr. Both sexes : underside hind wing with a 

 terminal black band ; J , underside fore 

 wing : a prominent yellow or white sub- 

 apical spot. 



3 . Underside hind wing: deep yellow, 

 anterior veins defined with black in 

 wet-season form, concolorous with 



wing in dry-season form 



b 3 . J , underside hind wing : pale yellow, 

 veins concolorous with wings at all 



seasons 



r 3 . J , underside hind wing : deep yellow, 

 anterior veins prominently edged with 

 black scales in wet-season form, nar- 

 rowly black in dry-season form, never 



concolorous with wings 



A 2 . Both sexes : underside hind wing with no 

 terminal black band ; c? , underside fore 

 wing : no subapical yellow or white spot. 

 ft 3 , tf , underside : pure white in wet-season 

 form, tinged with ochraceous in dry- 

 season form. 



a 4 . J , underside hind wing: immacu- 

 late at all seasons A . libythea, p. 200. 



\ A. hippo (typ.), 

 j p. 203. 



\A. hippo, race 



p. 205. 



. A 



