54 BULLETIN UNIVERSITY OF MONTANA. 



THE FRITILLARIES, THE SILVER SPOTS, THE ARGYNNIDS. 

 Genus Argynnis. Key to Species. 



1. Under side of wings with silver spots 2. 



Under side of wings without silver spots 6. 



2. Basal half of wings fulvous brown, strong colored sub-marginal 



band leto, P. oG 



Less than half the wings brown 3. 



3. Under side of hind wings with a light sub-marginal band 5. 



Under side of hind wings without a light sub-marginal band 4. 



4. Under side hind wings brown aphrodite, P. 57 



Under side hind wings olive green 9. 



5. Under side of hind wings light brown aphrodite, P. 57 



Under side hind wings maroon atlantis, P. G3 



Under side apex fore wings buff, base pale cinnamon red 



electa, P. 03 



Under side hind wings apex buff, mottled with green 



eurynome, P. 64 



Under side hind wings basal two-thirds reddish brown, size large, 



cybele, P. 54 



Under side hind wings deeply ferruginous bremneri, P. 62 



Under side hind wings dark reddish brown rhodope, P. 62 



6. Under side of hind wings ferruginous 7. 



Under side of hind wings greenish 8. 



7. Spots yellowish white hesperis, P. 61 



8. Spots dull green, eurynome, var. artonis, P. 65 



Spots dull green ,dark at outer edge, eurynome, var. clio, P. 65 



9. Under side hind wings olige green 



Ground color green, spots large edwardsii, P. 59 



ground color yellow and buff nevadensis, P. GO 



THE GREAT SPANGLED FRITILLARY. 

 Argynnis cybele, Fabricius, Fig. 42. 



Butterfly — The expanse of wings of specimens in the eastern states 

 is from 3 to 4 inches, or 76 to 102 mm. Upper surface fulvous or yel- 

 lowish brown, more yellowish in the male than in the female. In the cell 

 of the fore wings five black bars, except in the fourth bent outward in the 

 lower half, the two outer united above. Beyond the cell are the usual 

 zigzag black line and the subterminal row of dots, the middle ones of the 

 fore wings the largest. Just within the outer margin is a termnial 

 narrow line, and within this, and on the fore wings with their points rest- 

 ing on this line, is a row of crescents; the fore wings edged with the 

 same color. The cell of the hind wing with three more or less distinct 

 bars. 



Under side of fore wings pale yellowish brown, the apical space yel- 

 lowish and enclosing a bright brown costal patch; the lines and dots the 

 same as above, but near the apex more brown. The apical five or six 

 of the spaces enclosed within the submarginal crescents are wholly or 

 partly silver, with three silver patches within this line. 



