HOW TO KNOW THE BUTTERFLIES 



The Hybrid Purple 



Basilarchia proscrpimi (Bas-i-lar'chi-a pro-ser'pi-na) 



Flate XXVII, Fio. 2 



There is a form of basilarchia which was described as a 

 distinct species under the name p7-osc}pina, which is now 

 believed by Scudder to be a hybrid between astyanax and 

 arthemis, and by Edwards to be a dimorphic form of arthemis. 

 This butterfly has the coloring of astyanax, with the addition 

 of a portion of the white bow of arthemis. It occurs in a 

 narrow belt of country extending from southern Wisconsin 

 and northern Illinois eastward to the Atlantic coast of New 

 England. It should be noted that this is the region which 

 forms the southern limit of the range of arthemis and the 

 northern limit of the range of astyanax, the place where the 

 two species meet. The hybrid purple varies greatly. 



The Viceroy 



Basilarchia archippus (Bas-i-lar'chi-a ar-chip'pus) 



Plate XXVIII, Fig. 2 



The wings vary in color from a dull yellow orange tinged 

 slightly with brown to a dark cinnamon color ; they are bor- 

 dered with black, and all the veins are edged with the same 

 color. The fringe of the wings is spotted with white, and the 

 black border on the outer margin contains a row of white 

 spots. 



Caterpillar. — Length about an inch ; body humped and 

 naked, with many tubercles. In color it is dark brownish 

 yellow or olive green, with a pale buff or whitish saddle on the 



170 



