56 i\fr. Butler's lie/vision of (jrcnera of 



a. a. a. a. Subcostal nervulesof hindwing.s on a long footstalk. L(ncl<li((. 

 ** \J\)\wv disco-cellular of I'mntwiugs rather shorter than lower. 



McUiporki. 

 *** Upper disco-cellular of frontwings more than half tlie length 

 of lower. 



a. A silky patch, generally hairy, "beneath inner margin of 



frontwings in males. CaUidryas. 



b. No patch of hairs'beneath frontwings of males. Amijnthia. 

 **•'* Ujiper disco-cellular of frontwings half the length of lower. 



a. Second subcostal of frontwings emitted at end of cell. 



Catastida. 

 a. a. Second subcostal of frontwings emitted before end of cell. 



b. Upper disco-cellular of hindvvings one third to one fourth 



length of lower. Ijcias. 



c. Upper disco-cellular of hindwings half the length of lower. 



SiincMoi-. 



d. Upper disco-cellular of hindwings more than half the length 



of lower. I'icris. 

 ****" Ujiper disco-cellular of I'rontwings less than lialf the length 

 of loAver. 



a. Antenn;e moderately robust with gradually formed club. 



b. Upper disco-cellular of hindwings one fifth the length of 



lower. Goneptcry,i:. 



c. Upi)er disco-cellular of hindwings less than half the length 



of lower. Kvlcogonia. 



d. U2)l)er disco-cellular of hindwings one third the length of 



lower. Megonostoma. 

 a.a. Antennie long with flattened club. 



b. Palpi rather short, very hairy. Pontia. 



c. Palpi very long, hairy beneath. Tatochila. 



***''** Upper disco-cellular of frontwings one third the length of 

 lower. 



a. Second subcostal nervule of frontwings emitted at or after 



the end of cell. Colias. 

 a.a. Second subcostal nervule of frontwings emitted before cud of 

 cell. 



b. Median branches of frontwings at nearly equal distances 



apart. Lcptopliobia. 



c. Second and third median branches of frontwings near to- 



gether. Dercas. 

 '■****** Upper disco-cellular of frontwings aliout one sixth the 

 length of lower. HerpLcnia. 

 C. Two discoidal ncrvures in frontwings ; first discoidal nervurc of front- 

 wings not uniting with subcostal, but emitted at end of cell. 

 * Upper disco-cellular of frontwings scarcely longer than 



lower. Euclicira. 

 ** Upper disco-cellular of frontwings rather shorter than lower. 



a. Upper disco-cellular of hindwings reduced to a point. 



Terrimlus. 



b. Ujjper disco-cellular of hintlwings about half the length of 



lower. Ilcboiiwia. 



