Frick : New Abyssinian Rodents. 



23 



M EASUREMENTS. 



No. 7522, cf. 



(Type), 



Mm. 



No. 7523, cf, 

 Mm. 



No. 7524, cf, 

 Mm. 



No. 38, cf , 

 Mm. 



A. testicu- 

 lar is 

 jebelos 

 Mm. 



Length of body and head . . 



Length of tail 



Length of pes 



Greatest length of skull .... 



Basilar length of skull 



Condylo-incisive length of 



skull 



Zygomatic breadth 



Interorbital constriction. . . . 



Squamosal breadth 



Nasals, length and breadth 



Length of diastema 



Alveolar length of upper 



tooth-row 



Length of palatal foramen. 



Depth of brain-case 



Depth of maxillary region at 



fronto-nasal suture. . . . 

 Length of mandible 



141 

 138 



29 



34 



27-5 



32 



5-4 

 13.2 



13X4 

 8.2 



7 

 7 

 9.8 



8.5 

 18.7 



136 



145 

 28.5 

 34-2 

 27.7 



32.1 



17. 1 



5-2 



13-4 



12.3X4-3 



8.2 



7 

 7 

 9.6 



8.6 

 18.7 



132 

 137 



27 

 33-3 



27 



31-3 



17 

 5-2 



13-2 



12.3x4-2 

 8.1 



6.6 

 6.7 

 9-5 



17-8 



132 



143-5 

 27 

 32.2 

 26.5 



30. 5 



16.6 



5 



13 



II. 8X4 



7-6 



6.5 

 6.7 

 9-3 



8.3 

 17.6 



153 

 143 



28-29 



34 



28 



32 

 16.I 



5 

 12.7 



£3-2X3.7 

 8.5 



6.8 

 7.1 

 9-5 



19 



12. Arvicanthis abyssinicus raffertyi subsp. nov. (Plate V.) 



Type from Gardula, Southern Abyssinia, altitude 4,000 feet. 

 (Original field number D. G. R. 59. Collected March 29, 1912.) 



General Characters. — Rufescent, with tail of medium length, 

 and neither dorsal stripe nor white post-auricular patches. Very 

 similar in color to certain specimens of ^. a. nubilans Wroughton in 

 the U. S. National Museum, and also appearing to resemble Mr. Doll- 

 man's description of /I. a. zaphiri, but lacks the broad brain-case and 

 large pes of the latter. 



Squamosal breadth of brain-case 13.8 against 15.2 of A. a. zaphiri 

 Dollman^'and 14.2 oi A. a. nubilans Wroughton; average length of pes 

 27.5-28.5 versus 31 of A. a. zaphiri. 



Skull. — General proportions very similar to those of ^. c. nubilans 

 Wroughton from Kisumu in the U. S. National Museum. A series of 

 specimens shows great variations in size. (See measurements below.) 



Pelage. — Dorsal area cinnamon-brown^^to ochraceous tawny, heavily 

 lined with black and sharply differentiated from the gray of under parts. 

 Black lined main pelage of upper parts with broad light-colored terminal 



" DoUman on "Arvicanthis abyssinicus and allied East-African Species, with 

 Descriptions of Four New Forms," Ann. and Mag. Nat. Hist. (8), Vol. 8, 191 1, 



P- 334- 



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



