118 BULLETIN 99, UNITED STATES NATIONAL MUSEUM. 



specimens are v.dthout skulls, but the skins indicate a large, dark 

 colored form related to Jcempi. 



ACOMYS PERCIVAU DoUman. 



1911. Acomys percivali Dollman, Ann. and Mag. Nat. Hist., ser. 8, vol. 8, p. 126. 

 July. (Chanler Falls, Northern Guaso Nyiro, British East Africa; type 

 in British Museum.) 



Specimens. — Ninety-one, from the following localities: 

 British East Africa: Longaya Water, Marsabit Road, 2 in alco- 

 hol (Heller) ; Merele River, Marsabit Road, 38, including 13 in alco- 

 hol and 5 odd skulls (HeUer); Mount Gargues, 23, including 11 ia 

 alcohol (HeUer); Mount Lololokwi, 22, including 9 in alcohol 

 (Heller) ; Northern Guaso Nyiro River, 6 (Heller) . 



Specimens were trapped on the summit of Mount Lololowki, at 

 6,000 feet. Breeding records are as follows: Northern Guaso Nyiro, 

 October 4, two large embryos; Mount Gargues, September 3, two 

 embryos; and a single embryo each from two females on Marsabit 

 Road, July 28 and 30. 



ACOMYS WILSONl WILSONI Thomas. 



1892. Acomys wilsoni Thomas, Ann. and Mag. Nat. Hist., ser. 6, vol. 10, p. 22, 

 July. (Mombasa, British East Africa; type in British Museum.) 



1910. Acomys loilsoni Roosevelt, African Game Trails, Amer. ed., p. 473. 



London ed., p. 485. 



Specimens. — Eighteen, from localities as follows: 



British East Africa : Changamwe, 1 in alcohol (Mearns) ; Mari- 

 akani, 1 in alcohol (Heller); Mazeras, 1 (Heller); Mount Sagalla, 2 

 (Heller); Mtoto Andei, 13, including 6 in alcohol (Heller). 



ACOMYS WILSONI ABLUTUS DoUman. 



1911. Acomys ablutus Dollman, Ann. and Mag. Nat. Hist., ser. 8, vol. 8, p. 127. 



July. (Nyama Nyango,' Northern Guaso Nyiro, British East Africa; 

 type in British Mus.) 

 1914. Acomys ic[ilsoni] ablutus Dollman, Ann and Mag. Nat. Hist., ser. 8, vol. 

 14, p. 487. December. 



Specimens. — Fourteen, from localities as follows : 



British East Africa: Archer's Post, 4, including 3 in alcohol 

 (Heller) ; Isioli River, 6, including 2 in alcohol and 1 odd skull (Heller) ; 

 Northern Guaso Nyiro River, 4 in alcohol (Heller) , 



Heller found four embryos in a female collected at Archer's Post, 

 July 5; and one embryo in a female captured near the Isiola River, 

 July 1. Four embryos seem to be an unusually large number for 

 mice of this genus. 



1 According to Lonnberg, Kungl. Sv. Vet. Akad. Handl., vol. 48, No. 5, p. 96, 1912, this is another name 

 for Neuman's camp, or "Neuman's Boma" of some maps, situated on the Northern Guaso Nyiro River 

 near the mouth of the Isiola. 



