BUTTERFLIES OF MONTANA. 33 



2. Having the tips of wings marked with gray; a conspicuous bar at the 



end of the cell, 3. 



3. Under side; apex of fore wings with many green scales; hind 



wings with a network of greenish yellow scales. creusa. 



Under side; apex of fore wings with a few green scales; hind 

 wings crossed with several green bands, outer one trifid, 



olympia. 



Under side; hind wing with three irregular bands, outer one much 

 forked, ausonides. 



THE AUSONIDES ORANGE-TIP. 

 Synchole ausonides Boisduval. Fig. 30. 



Fig. 30. Synchloe aussonides. 



Butterfly Fore wings greenish beneath; hind wings marked with 

 three irregular green bands, the outer one forking into six or seven 

 branches toward the outer and inner margins. Expanse ,1.65 to 1.90 

 inches, 41-48 mm. 



Early Stages Caterpillar pale whitish green, with dark-green longi- 

 tudinal strips on the side and back. It feeds on cruciferous plants. 



Distribution It ranges from Arizona to Alaska, eastward to Colo- 

 rado. Brandegee reports it common at Helena. It is one of the most 

 abundant insects about Mis&oula in the spring, although not so abundant 

 as sara. 



