Frick : New Abyssinian Rodents. 11 



tinct inner groove, (see Fig. i, p. 12) and the posterior upper molar 



has seven laminae. (Lamination of the series ^ — - — .) 



4—2—2 



Pelage. — In general character identical with, but longer, coarser, 

 slightly lighter, and more olivaceous than, the smaller 0. j. malkensis 

 (see below), somewhat resembling O. thomasi Osgood from the Guaso 

 Nyiro, very distinctly differing from the dark forms, 0. elgonis Wrough- 

 ton, 0. tropicalis Thomas, and 0. irroraratus Brants, and most like 0. 

 orestes Th.om.3.s (see above). Dorsal area Dresden-brown^ in general ap- 

 pearance, sides lighter toned and but slightly differentiated from the 

 drab-like under parts. Upper pelage very long and soft; fur bicolored, 

 composed of a thick covering of comparatively short hair (24 mm. 

 in length) intermixed with longer hair (32 mm. in length). Basal 

 portion of entire coat slate-gray; tips of thick upper covering (i/io 

 of total length) vary from light buff' on the sides to antimony-yellow 

 on the back, longer scattered hair banded subterminally to terminally 

 with broad black annulations; tips of under parts shorter and light 

 buff-colored, general grayish appearance due to prominence of faded 

 basal fur; outer portions of arms and legs same as sides, inner portions 

 as under parts; end of snout, hair about eyes, and anterior ear-tufts 

 antimony-yellow; posterior ear-patches of uniform, long, faded, light 

 buff hair, ears large, sparsely clad; tail short, well covered with 

 bristles, dark above, light buff below, (annulations 11 per 10 mm.); 

 upper parts of feet gray, washed with buff; toes worn dark, claws 

 light to translucent. 



I take pleasure in naming this fine /Vbyssinian mountain form after 

 Mr. Edmund Heller, who has so greatly assisted the writer in com- 

 paring his material with that at the Smithsonian Institution. 



3. Otomys jacksoni malkensis subsp. nov. (Plate III, figs. 6-10.) 



Type from vicinity of Malka, Sidamo, Abyssinia, altitude 7,000 ft. 

 (Original field number G. D. R. 29, March 3, 1912.) 



General Characters. — Lighter colored than 0. jacksoni {typicus) 

 from Mt. Elgon (by published description, /. c), with which it agrees 

 in the proportions of the skull and body. (See table of measurements 

 under O.j. helleri.) 



Skull. — Fully adult. Measurements agree with those of 0. jack- 

 soni (see measurements above). 



' Ridgway I. c. {cf. footnote 4). 



