1914] Beebe : Review of the Genus, Gennseus. 319 



I found that about twenty-five per cent, were pure nycthemerus 

 while sixty per cent, were equally typical ripponi, the remaining 

 fifteen per cent, showing intermediate grades between the two. 

 Later I compared this great lot with several ripponi skins and 

 found them almost identical, though fluctuating slightly in the 

 direction of whiter nycthemerus or with the blacker shades of 

 the so-called rufipes. With this evidence I do not hesitate to 

 record this form as very probably hybrid in origin, but which in 

 some way has at present become sufficiently distributed and es- 

 tablished to warrant a sub-specific designation. 



Ghigi says : "Taking G. nycthemerus as a point of departure 

 we find among my hybrids, forms which differ from it to the 

 same extent as G. jonesi (ripponi) and G. rufipes. The males 

 {nychthemerus x muthura) x nycthemerus, correspond exactly 

 in their upper parts to the first of the two species now cited." 



Gennaeus cuvieri and oatesi. 



The status of these two forms rests upon different evidence. 

 Both have been obtained from the region west of the range 

 of lineatus and south of horsfieldi; cuvieri from the moutains 

 of North Arrakan and oatesi, farther south at about 18° North 

 Latitude. About a dozen specimens of cuvieri have been taken, 

 the first named by Temminck in 1820, while of oatesi only two 

 or three are known, collected since 1893. The fact that these 

 birds occur actually beyond the range of any other species and 

 removed from any contiguous borders of the haunts of other 

 Kaleege, is sufficient reason at least for giving them special 

 mention, whether or not future exploration will extend the 

 ranges of either lineatus or horsfieldi to include the haunts of 

 these forms. Combined with the fine vermiculation of the upper 

 plumage of lineatus, both add the white rump fringe of hors- 

 fieldi, so that no matter what their present status, there is little 

 doubt as to their origin. I refrain from giving them trinomials, 

 as no actual gradation has been discovered between them and 

 either of the other species. 



