40 Bulletin American Museum of Natural History [Vol. XL VII 



number 480 specimens, representing 20 forms (16 species and 4 additional 

 subspecies). The collection consists of many well-prepared skins with 

 skulls, a number of skeletons, and a few specimens preserved in alcohol. 

 The 315 specimens of Sciuridse are referred to 14 forms (10 species and 

 four additional subspecies), of which three subspecies are described as 

 new. The 125 specimens of Anomaluridse represent three genera and are 

 referable to 3 forms, one of them new to science. The Idiuridse are 

 represented by 40 specimens of three quite different forms, two of which 

 are here for the first time described. These far exceed the total number 

 previously extant in all of the museums of the world, their nocturnal 

 habits and secretive mode of life rendering their capture difficult. 



This is a very valuable accession as The American Museum of 

 Natural History had but little African material of this order previous to 

 the reception of the Lang-Chapin Collection. Other museums of this 

 country have generously placed at my disposal material for purposes of 

 comparison. To Mr. Gerrit S. Miller, Jr., Curator of mammals in the 

 United States National Museum, to Mr. Samuel Henshaw, Director, 

 and to Dr. G. M. Allen, Curator of mammals, of the Museum of Com- 

 parative Zoology at Harvard University, I am indebted for the loan 

 of many of their specimens. 



The forms, and the number of specimens of each and their localities, 

 are given in the subjoined lists. 



Species and Subspecies, with their Localities and Number of 

 Specimens from each Locality 



Speci- 

 Species and Subspecies Localities mens 



Sciuridse 



1. JEthosciurus poensis (A. Smith) Medje 2, Niapu 1 3 



2. Heliosciurus rufobrachium pasha 



(Schwann) Faradje 2, Niangara 10 12 



3. Heliosciurus rufobrachium medji- 



anus, new subspecies Akenge 1, Avakubi 1, Bosobangi 1, 



Gamangui 1 , Medje 23, Niapu 9 36 



4. Heliosciurus rufobrachium rubri- 



catus, new subspecies Avakubi 7, Bafwasende 1, Lubila 1 9 



5. Heliosciurus multicolor lateris 



Thomas Aba 1 1 



6. Funisciurus anerythrus anery- 



thrus (Thomas) Avakubi 7, Gamangui 6, Medje 8, 



Ngayu 2, Niangara 5 28 



7. Funisciurus anerythrus niapu, new 



subspecies Niapu 22, Stanleyville 2 24 



