COLLECTION OF BATS, 279 
the relative measurements and especially in the shape of 
‘the lobular projection of the outer margin of the ear. 
From Allen’s Monograph of the Bats of North America, 
1864, p. 25, however we learn that the very dimensions 
are rather varying — length of tail from 2 till 2.7, length 
of forearm from 1.9 till 2.2 inches a.s. 0. — meanwhile 
Allen’s figures 21 and 22 represent the rounded form of 
the named lobular projection much better than Dobson’s 
figure of the same part. So I do not hesitate to bring 
our specimens under this head. Length of the forearm 2.05 
and 1.925 inches, 51 and 48 mm. 
I observe that the type has been described by Allen in 
Proc. Acad. Philad. 1862, p. 246, not p. 146 (Allen’s 
Monograph, 1864), nor p. 46 (apud Peters, Monatsh. Akad, 
Berlin, 1871), nor p. 146 (Dobson’s Catalogue, 1878). 
Vespertilio nigricans Wied. 
Two adult males and one young male, eight adult fema- 
les and one young female. 
The young specimens have the face darker colored than 
the adult ones. Length of forearm: in the adult males 
1.35 inches (33.75 mm.); young male 0.95 ine. (23.75 mm.) ; 
adult females 1.4, 1.35, 1.3 inc. (35, 33.75, or 32.5 mm.); 
young female 1 ach (25 mm.). 
Natalus stramineus Gray. 
One not adult male. 
Very peculiar is the thick long moustache extending the 
whole length of the upper-lip (Tomes, P. Z. S. L. 1856, 
p. 178). According to Dobson (Catalogue, p. 348): »the 
tail is much longer than head and body, the extreme »tip 
alone projecting’; Tomes (l. c. p. 177) says: the tail is 
equal in length to the head and body, it consists of seven 
joints, the terminal one being small”, In my specimen the 
tail ends indistinctly in the membrane, the tip is not pro- 
jecting and the tail is shorter than head and body. Perhaps 
Notes fromm the Leyden Museum, Vol. XV. 
