394 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



COLIUS STRIATUS JEBELENSIS, new subspecies. 



RIVER JEBEL COLY. 



Type-specimen. — Adult male, Cat. No. 216489, U.S.N.M.; collected 

 at Gondokoro, Uganda, Africa, February 23, 1910, by J. Alden 

 Loring. (Original number, 868.) 



Characters. — Of the twelve accepted races of Colius striatus Gmelin 

 the subspecies jebelensis is much more closely related to the subspecies 

 berlepschi (Hartert) than to any of the others. It differs only in its 

 smaller size, barred instead of plain nape and upper mantle, paler and 

 browner coloration above, and more rufescent (less olivaceous) under 

 parts. 



Description of adult male and female. — Orbital region and lores 

 black, very finely dotted with grayish white; forehead black; crown 

 and crest light drab-gray; cheeks and ear-coverts silky grayish white; 

 upper side of neck, mantle, and outer surface of wings grayish drab, 

 the nape and upper mantle, only, finely and faintly cross-banded 

 with darker; back and upper tail-coverts drab; upper surface of tail 

 benzo brown; chin and throat blackish, each feather with a small 

 grayish- white spot; sides of neck and sides of upper chest grayish 

 brown, very finely cross-banded with dusky; chest, sides, abdomen, 

 and crissum buckthorn brown; under surface of tail buffy citrine, 

 shafts pale yellow except at tip, which is brown. 



Measurements of type (adult male). — Length of skin, 285; wing, 

 94; tail, 194; culmen (chord), 13; tarsus, 21.5. 



Average measurements often adult males. — Wing, 93.2; tail, 204.3; 

 culmen (chord), 12.9; tarsus, 21. 



Average measurements of six adult females. — Wing, 93.5; tail, 206.3; 

 culmen (chord), 13.2; tarsus, 21.4. 



Geographical range. — Upper Nile (Bahr el Jebel) from Gondokoro 

 to Lake Albert and eastward across Uganda to Lake Victoria. 



Remarlcs. — There is little possibility of mistaking this mousebird 

 for any of the three forms from northeastern Africa, as Von Zedlitz 

 has given excellent colored figures of Colius striatus leucotis, C. s. 

 erlangeri, and C s. hilgerti, in the Journal fur Ornithologie for 1910, 

 plate 10. Colius striatus affinis Shelley has been restricted to the 

 coast region of East Africa from German East Africa to Southern 

 Somaliland. From Colius striatus berlepschi Hartert, which occupies 

 the interior equatorial region from Mount Kilimanjaro and New 

 Heligoland west to Victoria Nyanza, it is readily distinguishable by 

 its smaller size; and berlepschi from nearly all of its range may be 

 known by the absence of cross-bars from the upper side of the neck 

 and upper mantle. 



