666 Bulletin Amei ican Museum of Natural History. [Vol. XXXV, 



very rapidly. Owing to the great diversity of color shown in this series, 

 I have given these specimens special study in an endeavor to divide them 

 into two or more species, but have failed in this effort and am forced to 

 consider them all of one form. The skulls of the oldest males are naturally 

 somewhat larger than those of younger males and females, but after all the 

 range of variation is no greater than in several species of shrews from 

 British East Africa, represented in the National Museum by equally large 

 series. 



There is also some variation in the relative size of the second and third 

 unicuspid teeth. This character certainly is not always a reliable one in 

 species of Crocidura which have these teeth normally somewhat of the same 

 size. 



Specimens from the Uelle drainage appear paler than the average skins 

 from the Ituri, but the pelages are not strictly comparable and the difference 

 is slight. 



The collectors note three pairs of inguinal mammae. One female col- 

 lected at Bafwabaka, December 29, contained two large embryos. 



7. Crocidura bicolor Bocage. 



1890. Crocidura bicolor Bocage, Jorn. Sci. Acad. Lisboa, Ser. 2, Vol. I, p. 29. 

 (Gambos, Angola.) 



A single very immature alcoholic specimen, with skull removed, from 

 Avakubi. It apparently represents a form very much like C. b. woosnami 

 Dollman from Lake Ngami; but it would be useless to attempt an exact 

 subspecific determination. There is a faint stripe of brownish along the 

 upper side of the otherwise whitish tail; the white bristle hairs are rather 

 inconspicuous; hands and feet whitish. 



8. Crocidura oritis sp. nov. 

 (Plate VII, Fig. 2; VIII, Figs. 2, 2a.) 



Type, No. 48510, Amer. Mus. Nat. Hist., skin and skull of adult d 71 (basal suture 

 closed; teeth moderately worn) collected at Avakubi, Ituri River, Belgian Congo, 

 July 6, 1914, by Herbert Lang and James P. Chapin. Orig. No. 2530. 



Related to Crocidura maurisca Thomas, but averaging less blackish brown in 

 color, the underparts less richly colored, and the feet less blackish. Size about as in 

 maurisca, but hind foot larger and skull more robust, with heavier teeth. Tail with 

 long bristles only at base as in maurisca and allies. 



Color. — Type:' Upperparts grayish brown, or dark hair brown, finety speckled 



