CHRYSOPTERON BARTELSII. 18 
NOTE VIL, 
CHRYSOPTERON BARTELSII, 
NOVUM GENUS ET NOVA SPECIES, FROM JAVA 
BY 
Dr. F. A. JENTINK. 
January 1910. 
Mr. Bartels forwarded to me some small Mammals from 
Java, for identification. It appears that a Bat belongs to 
a hitherto not recognized species. 
This Bat, found at the top (10,000 feet) of the Pange- 
rango-mountain, March 22, 1908, strongly reminds by its 
bright colours the splendid Kerivoula Weberi from Celebes, 
described by me in „Weber's Zoologische Ergebnisse”, 
Band I, p. 129, and figured on Tab. XI (1890—91). When 
I described the latter, I had not extracted the skull of this 
type-specimen, and so the middle lower incisors made the 
impression of having each three cusps, like many other 
Kerivoula-specimens; these incisors are so imbricated that, 
as a matter of fact, only three cusps are to be seen when 
the skull is in the flesh. Having, however, now extracted the 
skull for comparison with Bartels’ bat, I see not only 
that the middle lower incisors have four cusps each, but 
that moreover the second ones also have four cusps; fur- 
ther that the second upper premolar is very small and 
invisible from without, and that the skull is flat, not 
inflated. The skull of Bartels’ bat presents the very cha- 
racters. As they call in mind some Kerivouline-species by 
external appearance as well as by the four-cusped middle 
lower incisors, at the same time, however, they have some 
characters in common with true Vespertilionidae, especially 
with Myotis 1); by the flatness of the skull and the smallness 
1) Miller’s „Families and genera of bats”, 1907, p. 201. 
Notes from the Leyden Museum, Vol. XXXII. 
