GRAPTA V. 



INTERROGATIONIS, Vae. FABRICII. 



Form alike in both sexes; primaries strongly falcated, much excised; tail 

 longer, narrower, less tapering than in Umhrosa; anal angle much produced. 



Male. — Expands 2.5 to 2.7 inches. 



Upper side bright red-fulvous, the terminal third of primaries and whole of 

 secondaries obscured by ferruginous; s^iots as in Umhrom; hind margins of both 

 wings and abdominal margin at the fold largely edged with lilac; fringes fus- 



cous. 



Under side clouded in shades of brown and ferruginous, sometimes partially 

 suffused by pur2:)le; the general j^attern as in Uinbro.m, without the striking diver- 

 sity of color; the common row of black points more or less obsolete; costal edge of 

 primaries ferruginous beaded by small round yellow spots, between which and the 

 sub-costal uervure the ground is yellow specked with ferruginous; silver mark as 

 in Umhrosa. 



Female. — Expands 3 inches. 



Upper side similar to male; under side brown suffused with ochraceous, 

 deeply along hind margin; sometimes partially suffused with purplish instead of 

 ochraceous; the whole surface covered with fine abbreviated ferruginous streaks; 

 the common row of black points obsolete, or represented by two or three at outer 

 angle and apex only, and always minute. 



These varieties differ in shape of wings, in comparative breadth and length 

 of the tail, in the prominence of anal angle ; in both sexes in the color of upper 

 surface, in that of the marginal edges, and of the fringes; in the color of under 

 surface and in the relative position and extent of the yellow and ferruginous mark- 

 ings of the costal margin of primaries. These differences are conspicuous and 

 constant, there being, so far as I know, no intergrades. 



Until the publication of ]\Ir. Lintner's paper of 18G9, these two forms had 

 been treated by late authors as one species, one or the other, or the sexes of either, 

 being described as C aurcum or Intcrroijationis indifferently. Judging by the 

 imagos alone each was entitled to I'ank as a sjjecies, as they ju'esented constant dif- 

 ferences in essential characters and Mr. Lintner very properly separated them. 

 But believing that the darker species did not fall within the Fabrician descriptions, 

 he applied to it the name Umhrosa. 



