172 Bulletin American Museum of AMtural History [Vol. XLIII 



cell, while in some specimens this discal spot forms the lower end of a 

 pale band extending costad to the pale costal marginal border. No two 

 specimens are absolutely ahke. The submarginal spots on the upper 

 and under side are also variable, though generall}- indicated on the 

 upper side, and sometimes quite strongly; in other specimens, particu- 

 larty on the lower side, these submarginal spots are more or less obsolete. 

 The transverse apical band in the males is, as in Staudinger's figvu-e, 

 narrow and greenish, and the apical region on the upper side in the males 

 is more or less suffused with green. In the females the transverse sub- 

 apical band is white, showing strongly against the black apical area of 

 the fore wings on the upper side, and is composed of four spots. 

 None of the specimens are absolutely typical E. preussi Staudinger, but 

 knowing, as I do, how greatly these insects tend to var\', I am not 

 inclined to set up a new species merely basing it upon the slightly 

 different shade of the lower side of the wings. 



(200) 5a. Euphaedra preussi njami Staudinger 



Euphoedra preussi var. njami Staudinger, 1891, Iris, IV, p. 125. 



I refer to this varietal form erected by Staudinger twenty-one males 

 and six females, all taken at Medje at dates ranging from April to 

 September, except two males taken at Niangara in November and one 

 female captured at Gamangui in June. 



Staudinger differentiates this form from his E. preussi by stating 

 in his description that the fore wings of the male on the upper side are 

 darker, not laved with green, and that on the under side they are ferru- 

 ginous and, further, that the submarginal spots on the lower side are 

 distinctly visible. The long series of specimens before me which I refer 

 to this form correspond closely with Staudinger's description, but 

 there is considerable variability in the shading of the upper and under 

 sides of the wings. On the upper side, some are distinctly greenish ; in 

 others the ground-color passes into bluish green. On the under side, 

 some are indeed ferruginous, as he states; others, however, are somewhat 

 greenish, and no two are absolutely alike in every minute particular. 

 Almost all have a small light spot on the under side of the secondaries 

 beyond the end of the cell, and in some specimens this light spot is 

 extended costad, forming a light bar which loses itself in the pale costal 

 border. There is extreme variability in this respect. The females are 

 like the females of typical preussi, but almost all of them have the pale 

 discal transverse band on the secondaries running from the end of the 

 cell upward toward the costa more distinctl}' marked than in the males. 



