47G Prof. E. B, Poulton on the Mimetic N. American 



blue iridescence are far less perfect mimics. Similarly 

 in the Neotropical Region many species of Chloripj^c 

 have brilliantly iridescent blue males, while the females are 

 beautifully mimetic of Adelphas. In other species both 

 sexes are mimetic of the same genus. These Chlorippes 

 differ from the Apaturas in the much greater brilliancy of 

 the males and the far closer mimicry in the females. Nor are 

 they altogether restricted to the Adeljiha models ; for the 

 female of C. zvnilda, Godt., is a mimic of such a Callicore 

 as candrena, Godt. As in Apatvra, the mimetic resem- 

 blance of Clilorippc is confined to the upper surface. 



The powerful genus Adelpha, with over 70 species, of 

 which 31 extend into Central America, forms a homo- 

 geneous tropical group, at once distinguished by the 

 hairiness of the eyes in front from the allied Limcnitis of 

 the northern belt. A single species with smooth e3'es, 

 provisionally included in the genus by Godman and Salvin, 

 is not only removed from the other Adelphas by this 

 feature, but also by its distribution ; for its northern form, 

 A. calif ornica, Butl., ranges through California into Oregon, 

 while the southern form, hrcdowi, Hiibn., extending from 

 Guatemala through Mexico into Arizona, reaches much 

 further north than any other species of the genus. In the 

 brief statements printed in the Proceedings of this Society 

 (1907, pp. lxxvii,lxxix, Ixxx) I have followed Godman and 

 Salvin in provisionally retaining this remarkable form in 

 the genus Adcljihci, a position also assigned to it by Dr. 

 W. J. Holland (" Butterfly Book," p. 187). Since these 

 brief notes were prepared, Mr. G. A. K. Marshall has also 

 studied its position, and I agree with \\\m.i\\aX hrcdowi and 

 californica should be removed from the southern genus 

 Adclpha and provisionally placed in the heterogeneous 

 northern group, Limcnitis, a position assigned to them by 

 Scudder in 1875 (Bull. Buffalo Soc. N. Sc, Feb. 1875, p. 

 233). The hairy eyes appear to be the only consistent point 

 of discrimination between Adelpha and the northern 

 Lime7iitis, and even this distinction breaks down in the 

 hairy-eyed Indian species of the latter group. The smooth 

 eyes and the northern range support the removal of 

 Ircdoivi from Adelpha, while its very different male 

 secondary organs are not alone sufficient ground for 

 generic separation from Limcnitis (Najas) lorqnini. The 

 evolutional point of view also supports the removal of 

 hrcdowi and californica from Adelpha. Omitting these 



