new Species of Nyctinomus. 503 
Hars thin, united at their bases, but not forming a promi- 
nent folded lobe at their junction ; their anterior edge evenly 
but slightly convex, not folded back, without minute warts ; 
tip broadly rounded off; outer edge strongly convex; anti- 
tragus high, broadly triangular ; keel low, not flattened or 
thickened externally; tragus minute, triangular. Lips with 
vertical wrinkles. Apparently no gular sac. Pad at base 
of thumb not specially large. Wings to the distal third of 
the tibize, on their inner aspect. Tail involved in membrane 
for about three fifths of its length; at its base, on the upper 
surface, occupying the middle of the interfemoral area, there 
is a large glandular swelling, 8 millim. long by 6 broad, 
covered with fine fur ; this swelling is caused by the presence 
of a pair of glands, presumably of a scent-secreting nature, 
which open on the under surface of the interfemoral by two 
large mouths, each over 3 millim. in length, placed diagonally 
on the two sides of the tail some 5 millim. behind the anus ; 
the area round these mouths well covered with fine silky 
white hair ; internally some sort of dark-coloured glandular 
secretion is present. 
Colour above chocolate-brown, rather paler below, the tips 
of the belly-hairs greyish. Wings and interfemoral mem- 
branes above brown, below brown outside of the elbow, white 
near the body and on the interfemoral. 
Skull rather small in proportion, smoothly rounded, a low 
median crest present running from the level of the inter- 
temporal constriction to the occiput. Premaxille imperfect 
mesially, but the opening between them unusually small. 
Incisors 2, the upper slender, not far apart, nearly parallel. 
Anterior upper premolar small but not crowded, standing in 
the line of the tooth-row, its conical point higher than the 
cingula of the neighbouring teeth. 
Dimensions of the type (measured in the flesh) :— 
Forearm 47 millim. 
Head and body 63; tail 35; ear 15; tragus 1°3; height 
of antitragus 2°2; third finger, metacarpal 46, first phalanx 
19, second phalanx 18; fifth finger, metacarpal 27, first 
halanx 14, second phalanx 5 ; lower leg and foot (s. u.) 24. 
Skull: greatest length 18-1; basal length in middle line 
13°8; zygomatic breadth 11:2; anteorbital breadth 6°5 ; 
constriction 3°7 ; mastoid breadth 10:3; front of canine to 
back of m? 6°8; front of lower canine to back of m3 7:1. 
Hab. Mangala, on the east bank of the Nile, 25 miles N. 
of Gondokoro. 
Type. Adult male. B.M. no.2.7.4.4. Original number 
2805. Collected and presented by W. L. 8. Loat, Esq. 
33* 
