46 THE COMMONER BUTTERFLIES. 



\\\ A tubercle just below the spiracle-line 

 on the third thoracic segment.* 



2. Euphych^yas. 

 h^ No tubercle just below the spiracle-line 

 on the third thoracic segment. 



3. Cinclidia. 

 g\ Body scarcely tapering in front, striped 

 longitudinally. 

 h\ Tubercles slender, tapering but little, 

 three times as high as broad. 



4. Charidryas. 

 h." Tubercles stout, conical, less than twice 



as high as broad 5. Pliyciodes. 



r\ Spines horny, their sides supporting scat- 

 tered needles, one at tip crowning 

 the whole. 

 G\ No spines along the middle line of the 



back (Tribe Fritillaries.) 



h\ Spines only about half as long as the 



joints of the body G. Breniliis, 



h^. Spines fully as long as the joints of the 

 body, 

 i*. All the sjiines of upper row equal or 

 subequal and like the rest. 



7. Argynnis, 

 i^ Most of the upper spines of ab- 

 dominal segments a little longer 

 than the rest, the others nearly 



equal 8. Speyeria. 



i^ Upper spines of first thoracic segment 

 longer than the rest and distinctly 

 enlarged at tip, the others equal. 



9. Euptoieta. 



* There is of course no spiracle on this segment ; the spiracle-line 

 may be determined by comparing those of the segments next suc- 

 ceeding. 



