ALLEN: MAMMALS FROM THE BLUE NILE VALLEY. 349 
SCOTEINUS SCHLIEFFENI (Peters). 
Schlieffen’s Bat. 
Nycticejus schlieffenit Peters, Monatsb. K6n. preuss. akad. wiss., 1859, p. 224. 
Dr. Phillips shot an adult male of this bat at Bados, on the Blue 
Nile. It was flying about at the edge of a broad marsh just at dusk. 
In common with Scotoecus, it has a large penial bone, 12 mm. long 
in this specimen, clothed with very short whitish hairs directed basally. 
Dobson mentions a specimen in which a minute first upper premolar 
was present on one side only, and another in which this tooth was 
found on both sides. Our specimen presents a similar anomaly in 
possessing this extra premolar on both sides, wedged in the angle 
between the canine and the large premolar. The wings seem rela- 
tively short, due apparently to the short third finger which but little 
exceeds the fourth. 
The type specimen of this bat came from Cairo, Egypt. Later 
writers persistently misspell the specific name, by omitting an “f.”’ 
SCOTOPHILUS NIGRITA LEUCOGASTER (Cretzschmar). 
White-bellied Brown Bat. 
Nycticejus leucogaster Cretzschmar, Riippell’s Atlas reise in nérdlichen Afrika. 
Saugeth., 1826, p. 71, pl. 28, fig. a. 
This large species is common throughout most of the African conti- 
nent and has been subdivided into several races. Thomas (Ann. 
mag. nat. hist., 1904, ser. 7, 13, p. 208) states that Cretzschmar’s 
name is applicable to the Abyssinian form, though Kordofan is the 
type locality. True nigrita of West Africa, Senegal, is larger, with 
forearm, as measured on Schreber’s plate, 57 mm. 
We obtained specimens at Magangani and at Fazogli on the Blue 
Nile. They appear shortly after sunset while it is yet light, and are 
_ among the first bats flying. Their flight is straightforward, fairly 
Steady and not so swift as that of the Chaerephons, and they com- 
Inonly are at an elevation of 30 or 40 feet. During the daytime they 
rest in hollow trees (Cretzschmar). Most of those obtained were 
excessively fat. The color above is an olive-brown, distinctly darker 
on the crown and nape, where in one specimen at least, there are a few 
minute white flecks, and the tips of the hairs are minutely white, 
