Miller and Hollister — New Murine Rodents. 69 



River, Borneo (referred to R. ephippium^), in having a longer tail and 

 wider skull; the brain case, especially, less narrowed. 



Measurements. — Type: Head and body, 123 mm.; tail, 150; hind foot, 

 27. Average measurements of ten adult males from type locality: Head 

 and body, 121.7; tail, 146.7; hind foot, 26. Skull of type: Condylobasal 

 length, 29.0; zygomatic breadth, 14.4; palatal length, 16.5; breadth of 

 braincase, 13.2; interorbital breadth, 4.9; mandible, 16.8; maxillary tooth 

 row, 5.6; mandibular tooth row, 5.5. 



Specimens examined. — Eighty-nine, including 79 from the type locality, 

 and ten from the following localities in Middle Celebes: Besoa, 2; Gimpoe, 

 4; Pinedapa, 1; Toware, Bada, 2; Watoetaoe, Napoe, 1. 



Remarks. — This is the species usually listed as ephippium in the literature 

 of the mammals of Celebes. It clearly needs separation from both Rattus 

 ephippium and R. concolor. Specimens from Middle Celebes seem inseparable 

 from those from Toll Toli; but a well marked local form of the species, 

 described below, occurs in northeastern Celebes. 



Rattus raveni eurous, subsp. nov. 



Type from Molengkapoti, Kwandang, North Celebes. No. 199,927, U. S. 

 National Museum; skin and skull of adult c? (teeth moderately worn); 

 collected October 15, 1914, by H. C. Raven; original number 1724. 



Diagnosis. — Differs from Rattus raveni raveni in smaller size and darker 

 coloration. Upperparts grizzled Sudan brown; the color decidedly reddish 

 brown rather than ochraceous, buffy, or tawny as in true raveni. Tail and 

 hind foot shorter. 



Measurements. — Type: Head and body, 110 mm.; tail, 135; hind foot, 

 24. Average measurements of ten adult males from type locality: Head 

 and body, 114.8; tail, 131.0; hind foot, 24.2. Skull of type: Condylobasal 

 length, 28.3; zygomatic breadth. 13.9; palatal length, 15.2; breadth of 

 braincase, 13.2; interorbital breadth, 4.6; mandible, 16.7; maxillary tooth 

 row, 5.3; mandibular tooth row, 4.9. 



Specimens examined. — Thirty-five, all from North Celebes: Koeala 

 Prang, 1; Molengkapoti, 26; Pulo Paleleh, 1; Temboan, 5; Teteamoet, 2. 



Remarks. — All specimens of Rattus raveni from localities between the 

 Paleleh River and the eastern extremity of the northern peninsula are 

 referable to the subspecies eurous. They are decidely smaller and more 

 reddish in color than specimens from the western end of the northern 

 peninsula, at Toli Toli, and from Middle Celebes. This form approaches 

 in appearance Rattus buruensis (Allen) from Bouru Island, but is somewhat 

 lighter colored, more reddish, than that species, and has a decidedly weaker 

 skull, with smaller teeth. 



Rattus palelae, sp. nov. 



Type from Pulo Paleleh, north coast of Celebes. No. 200,063, U. S. 

 National Museum; skin and skull of adult 9 (teeth moderately worn) ; 

 collected August 2, 1914, by H. C. Raven; original number 1619. 



iLyon. Proc. U. S. Nat. Mus., Vol. 40; p. 98, 1911. 



