82 MAMMALIA. 
Buff. VIII, xvi, 2 and 20; Geoff. loc. cit., both of which in- 
habit quarries solitarily, and suspended by their feet, envelop- 
ing themselves with their wings so that no part of the body is 
visible.(1) 
Nycreris, Cuy. and Geoff. 
The forehead furrowed by a longitudinal groove, which is even 
marked upon the cranium, bordered by a fold of the skin which par- 
tially covers it; nostrils simple ; four incisors without intervals 
above and six below; ears large and separated; tail involved in the 
interfemoral membrane. They are African species. Daubenton 
has described one by the name of the Campagnol volant, Buff. X, 
pl. xx, fig. 1 and 2, the V. hispidus, Lin., Schreb. LVI. M. Geoff- 
roy has found others in Egypt.(2) 
Rurtvoroma, Geoff. 
The pit on the forehead less strongly marked ; nostrils at the end 
of the muzzle with a little leaf above, somewhat resembling a cur- 
rier’s knife; ears united ; tail extending far beyond the membrane. 
One is known in Egypt, where it is principally found in the pyra- 
mids.(3) 
Taruozous, Geoff. 
A small round pit on the nose; no recurved leaf to the nostrils ; 
head pyramidal ; only two incisors above, and very often none; four 
trilobate incisors below; ears wide apart, and the tail free above the 
membrane. The males have a transverse cavity under the throat. 
A little prolongation of the membrane of the wings forms a sort of 
sac near the carpus.(4) One species was discovered in the cata- 
combs of Egypt by M. Geoffroy.(5) 
(1) Add the other four species figured, Geoff. Ann. Mus. XX, pl. 5, of which 
one is the Vesp. speoris, Schreb. LIX, B. and Peron, Voy. aux Terres, Aust. pl. 35. | 
(2) Nyctére de la Thébaide, 29, Mammif. 1, 2, 2; and Ann. Mus. XX, pl. 1.—/. 
de Java, Geoff. Ann. Mus. XX, pl. 1. 
(3) Rhinopome microphylle, Geoff.; Vesper. microphyllus, Schr. 
(4) lt was this that caused Illiger to name the genus which contained the Ta- 
phiens Saccopteriz. 
(5) The Tuphien filet, Eg. Mammif. I, 1, 1.—The Taphien perforé, ib. W1,4, which 
does not appear to differ from the Lerot volant, Daub.; 7! senegalensis, G.—Add the 
Vesp. lepturus, Gm., Schr. LVUI.—The T: of India; V. brachmanus, G.—The T: 
of the Isle of France; T. mauritianus, G.—The T. rufus, Wils. Amer. Ornith. yol. 
VI, pl. 50, No. 4.—The 7. longimanus, Hardw. Lin, Trans. yol. and pl. XVII. 
