204 



U.S. NATIONAL MUSEUM BULLETIN" 2 75 



Figure 45. — Distribution of Mus musculus. Circles indicate specimens examined; triangle 



indicates published record. 



Published records in Libya. Cyrenaica: Benghazi, Derna (Klap- 

 tocz, 1909 [Mus musculus orientalis Cretzschmar]); Benghazi, Ghe- 

 minez (Festa, 1921 [Mus musculus gentilis Brants]); Benghazi (Har- 

 tert, 1923); Giarabub (de Beaux, 1928 [Mus musculus musculus and 

 M. m. orientalis]) ; Augila, Cufra and Gialo (de Beaux, 1932 [M. m. 

 orientalis}) ; Derna, Wadi el Kuf (M. m. orientalis) and Merg (Mus 

 musculus brevirostris) (de Beaux, 1938); Tripolitania: Tarhuna 

 (Thomas, 1902 [M. m. orientalis]); Tripoli (Klaptocz, 1909 [M. m. 

 orientalis]); Fezzan: Idri, Murzuch (Toschi, 1951 [M. m. gentilis]). 



Measurements. Averages and extremes of 17 males and 8 females 

 from Brach, Fezzan Province, are, respectively: Total length 164.1 

 (149-182), 158.6 (156-163); length of tail 82.9 (76-90), 78.3 (75-81); 

 length of hind foot 19 (18-20), 18.8 (18-19); length of ear 16.6 (14- 

 21), 15.4 (14-20); greatest length of skull 22 (20.7-23.2), 21.3 (20.7- 

 22.2); condyloincisive length of skull 21.1 (19.6-22.2), 20.4 (19.8- 

 21.3); crown length of upper molariform toothrow 3.7 (3.3-4), 3.7 

 (3.6-3.9); greatest breadth across zygomatic arches 11.5 (10.9-11.9), 

 11.3 (10.9-11.6); least interorbital breadth 3.6 (3.5-3.8), 3.7 (3.5-3.8); 

 length of nasals 8.2 (7.5-8.6), 7.8 (7.1-8.4). 



