76 CHRYSOPTERON BARTELSII, 
Hodgson described in J. A. S. B. IV, 1835, p. 700, a 
bat from Nipal, lateron figured in P. Z. 8. L. 1858, Tab. 
LX, by Tomes; this bat, Vespertilio formosus, presents the 
same beautiful mode of coloration as Webert and Bartelsii; 
it very likely is a species of our new genus Chrysopteron; 
as however the teeth of formosus have not sufficiently 
been studied till now, it only is with a hypothetical degree 
of certainty that I suggest it to be a Chrysopteron. 
In the collection of our Museum there is a specimen 
labelled Vespertilio formosus, with Java als locality, without 
any further indication; the animal has been stuffed and 
is in a very bad state of conservation, being bleached out; 
the imperfect skull certainly indicates that the bat is not 
a Vespertilio, but a Kerivoula, perhaps a K. papillosa. I 
never saw a true formosus-specimen. 
Remark. By the imbricated and crowded position of the 
lower incisors it only is after a long and careful study, 
that, under a certain light, the number of the cusps can 
be stated; this perhaps may be the reason why generally 
so very few mention has been made of the mentioned 
teeth in Kerivoula-species; at best the authors record the 
number of cusps of the two central lower incisors; Dobson 
(Catalogue, 1878) described the lower incisors of the Keri- 
voula-species as follows: 
picta: lower incisors distinctly trifid, 
brunnea: outer lower incisors on each side have a blunt 
cusp, rising considerably above the others, 
africana: no history, 
Hardwickii: no history, 
papillosa: similar to Hardwick, 
pellucida: the two central lower incisors with four distinct 
cusps each; those on each side with three, whilst those 
next canines have a small cusp on their inner sides only, 
Jagoru: no history, 
papuensis: all the lower incisors trifid, 
aerosa: no history, 
lanosa : no history. 
Notes from the Leyden Museum, Vol. XXXII. 
