64 



fantasia Butl. ; the following arrangement seems to be more correct 

 than our present one : 

 lyside Godt. 



$ lanice Lint. 



form $ ( ? gen. vern.) terissa Luc. 

 form 9 unicolor G. & S. 



xanthophila Rob. 

 form ? fantasia Butl. 

 2 lanice Lint. 



EURYMUS EURYTHEME Bdv. (PI. VII, FigS. 3-5). 



Verity has figured the type $ and 2 of this species from the 

 Oberthur Collection in Rhop. Pal. Vol. I, PI. 49, Figs. 42, 43 ; the $ 

 is distinctly what has heretofore been known as ariadne Edw. 

 (Wright PL X, Fig. 77) although Verity states it is keewaydin Edw. 

 This $ does not entirely fit in with Boisduval's short description 

 (Ann. Soc. Fr. 1882, p. 386) which is largely comparative with the 

 Russian chrysotheme and it is possible that his specimens were not all 

 exactly alike; as however he immediately follows the description of 

 eurytheme with that of amphidusa from Northern California, which 

 he compares with the European cdusa (an orange species) and the 

 types of which Verity also figures (1. c. Figs. 44/45) and as amphi- 

 dusa is clearly the eurytheme of Edwards and later authors, it would 

 seem reasonable to suppose that there was really some noticeable dif- 

 ference between eurytheme and amphidusa or Boisduval would 

 scarcely have described them so close together and that therefore the 

 specimens figured by Verity are correct representations of what Bois- 

 duval intended to describe under these two names. 



Having determined that eurytheme Bdv. is the ariadne of Edwards 

 and that amphidusa Bdv. must be used for the eurytheme of various 

 authors there remains the form keewaydin Edw. to be correctly placed. 

 This form was described in Butt. N. Am., Vol. I, Colias, PI. IV, text, 

 Figs. 1-4; the main description appears to have been drawn up from 

 specimens from California and Texas with varieties from Illinois, 

 but at the close Edwards states that the species is found 'in the valley 

 of the Mississippi from Nebraska and Illinois to Texas and westward 

 to the Pacific' so that he evidently had a large and possibly mixed 

 series before him. The original description states 'upper side sulphur 

 yellow the disk of the wings more or less tinted with orange' which 

 certainly reads like something very close to eurytheme (ariadne); the 

 figure however (Fig. 1), represents a small form much closer to 



