KEY TO THE GROUPS— BUTTERFLY. 35 



i\ Outer margin of fore wing scarcely 

 shorter than the hind margin. 



2. Eiqjhydryas. 



i\ Outer margin of fore wing much 

 shorter than the hind margin. 



3. Cinclidia. 

 h^ Middle joint of palpi tapering consider- 

 ably on apical half ; fore tibia of 

 male very slender and of equal size 

 throughout, at least ten times longer 

 than broad. 



i\ Last joint of palpi nearly half as long 

 as the middle joint ; fore tibia of 

 male much shorter than the femur. 



4. Cliaridryas. 



i\ Last joint of palpi less than one third 

 as long as the middle joint ; fore 

 tibia of male scarcely shorter than 



the femur 5. Phyciodes. 



G^ Club of antennge spoon-shaped, about 

 twice as long as broad ; palpi large 

 and bushy, the last joint extremely 



short (Tribe Fritillaries.) 



h*. Vein 2^ of fore wings arising before the 

 end of the cell. 



i\ Middle joint of palpi more than three 

 fourths longer than the greatest 

 length of the eye 7. Ai^gyimis. 



i^ Middle joint of palpi only about one 

 fourth longer than the greatest 



length of the eye 8. Speyeria. 



h\ Vein 2^ of fore wings arising beyond the 

 end of the cell. 



i\ Curve of outer margin of fore wings 

 opening outwardly 6. Brentliis. 



