530 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loe 



length of ear 8; condyloincisive length of skull 15.9; crown length of 

 upper toothrow 2.9; greatest width across zygomatic arches 9.0; least 

 interorbital width 3.3; length of nasals 6.2; width of rostrum at level 

 of antorbital foramen 2.5. 



Remarks: When specimens of this subspecies are compared with 

 specimens of M. b. aequatoriiis they are found to differ in longer head 

 and body, longer tail, generall}^ longer hind foot, and darker coloration 

 in comparable pelages. The subauricular spot is markedly less 

 developed. The upper toothrow is longer and the rostrum is wider. 



Miis musculoides emesi Heller 



Mus musculoides emesi Heller, Smithsonian Misc. Coll., vol. 56, No. 17, p. 5, 

 February 28, 1911. (Kabula Muliro, Uganda.) 



Specimens Examined: Twelve, from: Lotti Forest, 5 (3, MCZ); 

 Katu-e, 3 (MCZ); Torit, 2 (MCZ); Lafon, 2 (MCZ). 



Measurements: The only complete specimen is an adult male 

 from Lotti Forest. It has the following measurements: Length of 

 head and body 65; length of tail 52; length of hind foot 15; length of 

 ear from notch 10; condyloincisive length of skull 18.1; crown length 

 of upper toothrow 3.3; least interorbital width 3.8; length of nasals 

 7.6; width of rostrum at level of antorbital foramen 2.6. 



Remarks: This small series of mice agrees in most details with the 

 type of M. m. emesi. There are, though, some peculiarities of the 

 cranium which are not observable in the type. These differences 

 may be due to age or sex, but skin color and external measurements 

 do agree with the type of emesi. 



This species can possibly be confused with Mus triton, but it can be 

 distinguished from that species by smaller size and the clear white 

 hairs of the belly. It can also be confused with the dark phase of 

 Mus bellus, but can be differentiated by the lack of a dorsal stripe and 

 by the much larger size of M^ 



Mus tenellus acholi Heller 



Figure 7,d 



Mus tenellus acholi Heller, Smithsonian Misc. Coll., vol. 56, No. 17, p. 6, Febru- 

 ary 28, 1911. (Rhino Camp, Lado Enclave.) 



Specimen Examined: One, from Torit. 



Measurements: An adult female from Torit measures as follows: 

 Length of head and body 71 ; length of tail 33; length of hind foot 14; 

 length of ear from notch 11.5; condyloincisive length of skuU 18.9; 

 crown length of upper toothi'ow 3.4; least interorbital width 3.7; 

 length of nasals 7.5; width of rostrum at level of antorbital foramen 

 2.6. 



