ALLEN: MAMMALS FROM THE BLUE NILE VALLEY. oA 
LAVIA FRONS AFFINIS Andersen and Wroughton. 
Northern Big-eared Bat. 
Lavia frons affinis Andersen and Wroughton, Ann. mag. nat. hist., 1907, ser. 7, 
19, p. 140. 
Specimens of this bat were obtained at Singa and Abu Zor on the 
Blue Nile, and at El Abiad on the Dinder. De Winton (1900) records 
it also from Roseires. No doubt it is one of the common species and 
widely distributed. Compared with a series of skins from British 
East Africa (Guaso Nyiro) representing L. frons frons those from the 
Sudan are decidedly smaller (forearms 56-61 mm., as against 62-63) 
and paler in color. Two males differ from any of the East African 
specimens in the color of the fur on the rump which shades into olive- 
green and forms a distinct patch at the posterior end of the body, con- 
trasting with the pearly gray of the rest of the coat. At Singa, 
December 28, 1912, two, a male and female, were found hanging in the 
branches of a thin mimosa tree where it was still shady in the early 
forenoon. ‘They hung one atop of the other and were possibly a mated 
pair. At other times they are frequently disturbed among _ thick 
bushes or vines in the daytime and ever alert, fly to a new covert 
when approached. Their habits during their periods of activity we 
could never observe. None were ever identified or shot in the evening 
when other species were collected. At El Abiad, however, just before 
dawn I noticed several flying about a large thorn tree above our tent 
and finally coming to rest in its upper twigs as the daylight came on. 
The shelter was so thin, that had they been undisturbed, they would 
doubtless have quitted it later for some thick vines near at hand. 
The dull orange-yellow of the membranes soon fades out in the pre- 
served specimen. 
RHINOLOPHUS DOBSONI Thomas. 
Dobson’s Leaf-nosed Bat. 
Rhinolophus clivosus Dobson, Cat. Chiropt. Brit. mus., 1878, p. 120 (nec 
Riippell). 
Rhinolophus dobsoni Thomas, Ann. mag. mat. hist., 1904, ser. 4, 14, p. 156. 
Thomas has shown that the alcoholic specimens from which Dobson 
drew his description of R. clivosus, were not that species but belong 
