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a. Dorso-lateral row of tubercles of approximately equal size. 



b. Dorso-mesal row of tubercles present on abdominal segments 4-7 ; 

 dorso-lateral tubercles much larger than the stigmatal rows ; cari- 



nate ridge present on mesothorax Argynnis Fabricius. 



bb. Dorso-mesal row of tubercles absent on all segments; dorso-lat- 

 eral tubercles about equal in size to the dorsal stigmatal row ; 



mesothorax without a carinate ridge Euptoieta Doubleday. 



aa. Dorso-lateral row of tubercles of different sizes, the largest on the 

 third abdominal segment, 

 b. Body with a very strong ventral curve opposite the third and 

 fourth abdominal segments; mesothorax with a strongly ele- 

 vated median ridge throughout its length ; head projections very 

 prominent, irregularly bilobed. 



Agraulis Boisduval and Le Conte. 

 bb. Body without a strong ventral curve ; mesothorax with a small 

 ridge on the caudal half; head projections short, pointed. 



Brentliis Hiibner. 

 The following species were examined : 

 Argynnis cybele Fabricius 

 Euptoieta claudia Cramer 

 Agraulis vanillae Linnaeus 

 Brcnthis myrina Cramer 



Tribe MELITAEINI 



The species in this group have the dorso-mesal and dorso-lateral 

 tubercles of approximately equal size, but none of them are very large 

 and they are usually rounded. The cremaster always has a prominent 

 projection on each side at its proximal end. The genera of Melitaeini 

 may be separated as follows : 



a. Tubercles of the dorsal spiracular row not present on the second ab- 

 dominal segment ; no tubercles present on the eighth abdominal seg- 

 ment. 



b. Dorsum of abdomen with a distinct tranverse ridge on the fourth 

 segment; dorsal spiracular row of tubercles not distinct on any 



of the segments Phyciodes Hiibner. 



bb. Dorsum of abdomen without a transverse ridge on the fourth seg- 

 ment ; dorsal spiracular row of tubercles very large on the third 



and fourth abdominal segments Charidryas Scudder. 



aa. Tubercles of the dorsal spiracular row present on the second abdom- 

 inal segment; tubercles present on the eighth abdominal segment, 

 b. Tubercles of the eighth abdominal segment nearly as large as the 

 others, the abdominal tubercles all broadly rounded and never 

 longer than broad ; cremaster with a deep depression on the dor- 

 sal surface and a circular depression on the ventral surface, the 

 lateral tubercles very prominent, rounded, smooth and polished. 



EupJiydryas Scudder. 



