94 



P. robinice shows remarkable variation ; but usually specimens 

 from a given locality present a similar appearance, probably because 

 the heavy bodies of the females hinder rapid distribution and inter- 

 mingling of local races. In the Barnes Collection the species is rep- 

 resented by 38 males and 40 females from various parts of the United 

 States. Arranged according to localities, differences are at once ap- 

 parent. 



Florida females average slightly darker hind wings than typical 

 eastern material and to this minor race the name ^abolicus Stkr. may 

 be applied. 



P. robinice ab. quercus Ehrm. is an aberration of the normal east- 

 ern female; possessing yellowish secondaries. 



P. robinice ab. reticulates Lint., described from a female from 

 Texas, has the primaries reticulate, with only the median patch visible 

 and that is reduced. The males presumably are like the normal Texas 

 race, which is intermediate between the eastern and western races. 

 Reticulate aberrations occur in all of the races, but seem scarcely 

 worthy of separate names. 



From Texas westward the males show more yellow on the sec- 

 ondaries, the black not reaching the inner angle as in the eastern races ; 

 altho two males from Palm Springs, Calif., approach eastern material 

 in this respect. Arizona material shows little black on the male sec- 

 ondaries. Texas males have the primaries somewhat paler than eastern 

 males, but the females are very similar. Colorado, and parts of 

 Arizona (Yuma and Mohave Cos.), produce a paler race than the 

 east. Two females from the Huachuca Mts. of Arizona are quite sim- 

 ilar to eastern females. Cochise Co., Ariz., produces a form in which 

 both males and females are very dark, the secondaries of the females 

 obscured by black and very slightly tinged with yellow in some speci- 

 mens. Inyo Co., Calif., produces a form in which the secondaries 

 of the males appear more rounded at the anal angle than in the other 

 forms, thus approaching the wing shape of the females, while the sec- 

 ondaries of the females are tinged with yellowish. Nevada produces 

 forms similar to Inyo Co., intermediate to the pale Colorado forms. 



Racial forms might be named in quantity but the authors prefer 

 to name only the conspicuous extremes; allowing the others to stand 

 as intermediates. 



