Dental formula: Inc., 2/6 or 2/4; can., 1—1/1—1; premol., 2—2/2—2; mol., 3—3/3—3.
HABITAT.—India generally.
DESCRIPTION.—Muzzle broad and thick; upper lip overhanging the lower, marked by vertical wrinkles; ears large and quadrilateral; outer margin ending in a decided anti-tragus; tail thick; the lower part of the leg is free from the wing membrane, which however, is connected with the ankle by a strong fibrous band; fur dense, smoky or snuff brown above (or bluish black—Dobson); paler beneath.
SIZE.—Head and body about 2-1/10 inches; tail, 1-1/10. Jerdon gives length, 4¼ to 4-1/10; expanse, 13½; tail, 1¾.
This bat is common about Calcutta, frequenting ruins, dark places and hollow trees. It is allied to N. tenuis (Horsfield), and it is mentioned as inhabiting hollow trees in such numbers as to attract attention by the hissing noise from within, every available spot in the interior being occupied. A synonym of the genus is Dysopes.
HABITAT.—India generally.
DESCRIPTION.—This differs from the last in having the wing membrane from the ankles, and in the free portion of the tail being shorter; ears united at the base; tragus broad and rounded above, partially concealed by the large anti-tragus.
SIZE.—About the same as the last.
These bats have simple nostrils, as in the frugivorous ones, with no complications of foliated cutaneous appendages; the muzzle is conical, moderately long, and clad with fur; the ears wide apart; the inner margins springing from the sides, not the top of the head; the tragi are large; eyes usually very small, and the tail, which is long, is wholly included in the membrane.
Dentition (usually): Inc., 2—2/6; can., 1—1/1—1, premol., 3—3/3—3; mol., 3—3/3—3. The upper incisors are small, and placed in pairs near the canines, leaving a gap in the centre. The lower ones sharp-edged and somewhat notched. At birth there are twenty-two teeth, which are shed, and replaced by others, with sixteen additional ones, the adult bat having thirty-eight teeth.
Ears very large, united at the base; outer margin of the ear conch terminating opposite the base of the tragus, the inner margin with an abrupt rounded projection directed inwards above the base; tragus very large, tapering upwards, with a lobe at the base of the outer margin.
Dentition: Inc., 2—2/6; can., 1—1/1—1; premolars, 2—2/2—2; molars, 3—3/3—3.
The English species P. auritus is very common there, and also in France; its ears are nearly as long as its body, yet, when reposing, they are so folded as to be almost out of sight. The Indian species is only a variety distinguishable by its yet longer ears ("and comparative shortness of the thumbs"—Dobson).
HABITAT.—The Himalayas and the Khasia Hills.
DESCRIPTION.—Head slightly raised above the face-line; ears nearly as long as the fore-arm, joined by a low band across the forehead at the bases of their inner margins; wings from the base of the toes; feet slender; tip of the tail free; fur silky, short, and of a uniform dull brown.
SIZE.—Head and body, 1·7 inch; ears, 1·55 (ears of English type of same size, 1·4 inch); tail, 1·7 inch. Jerdon gives larger results, but I put more reliance on Dobson's figures.
Bats with very broad and obtuse muzzles; the glandular prominences much developed between the eyes and the nostrils; crown of the head flat; but what distinguishes it from the following genus, Scotophilus, is the presence of four incisors in the upper jaw, whereas Scotophilus has two only—otherwise the two genera are very similar.
HABITAT.—Nepal.
DESCRIPTION.—Head broad and flat; ears oval and broad; the outer margin convex, reflected backwards, and forming a thick lobe terminating close to the angle of the mouth; tragus short and curved inwards; muzzle devoid of hair; fur dark reddish brown.
HABITAT.—Deserts of Northern India, and Beluchistan.
DESCRIPTION.—"Ears, sides of face, about the eyes, interfemoral membrane, antehumeral membrane, and that portion of the wing membrane along the sides of the body, white, very translucent; remaining portion of wing membrane sepia, traversed by very distinct reticulations; fur on the upper surface black at the base of the hairs for about half their length, remaining portion light yellowish brown; beneath the same, but paler, almost white."—Dobson.
HABITAT.—Khasya Hills.
DESCRIPTION.—Muzzle broad and flat, with large labial development; ears broad, triangular, broadly rounded off above; tragus broad and square; fur long and dense, uniformly sooty brown, with greyish tips; membranes, nose, ears and lips black.
SIZE.—Head and body 1-1/10 inch; tail, 1 inch.
HABITAT.—Burmah (Bhamo, Yunan).
DESCRIPTION (apud Dobson).—Head flat; upper labial glands so developed as to cause a deep depression between them on the face behind the nostrils; ears broad as long from behind; the outer margin extends from the tip to its termination near the corner of the mouth without emargination or lobe; tragus broad; inner margin straight; outer convex; small triangular lobe at base. Fur chocolate brown above, lighter on head and neck; beneath dark brown with lighter tips on the pubes, and along the thighs dirty white or pale buff.
SIZE.—Head and body, 1·9 inch; tail, 1·65 inch.
There is a good figure of the head of this bat in Dobson's Monograph; it was obtained by Dr. J. Anderson at an elevation of 4500 feet at Bhamo.
DESCRIPTION.—"This species is readily distinguished by the peculiar thickness of the lower half of the outer side of the ear-conch, which appears as it were excavated out of the thick integument of the neck; tragus short, curved inwards."—Dobson.
This bat is more fully described with three illustrations in Dobson's Monograph; he does not mention where it is found, so it may or it may not be an Indian species.
HABITAT.—Darjeeling.
DESCRIPTION.—Head broad; muzzle obtuse; upper labial glands largely developed; ears large, oval, with rounded tips, which in the natural position of the ears appear acute, owing to the longitudinal folding of the outer side of the conch on the inner, commencing at and almost bisecting the tip (Dobson). Fur long, dense and black; Jerdon says rich dark brown; paler beneath.
SIZE.—Head and body, 1·9 inch; tail, 1·8 inch.
HABITAT.—Chybassa, Jashpur, and Sirguja.
DESCRIPTION.—Head broad and flat; labial glands developed; ears moderate, rounded above; outer edge straight, emarginate opposite base of tragus, terminating in a small lobe; tragus lunate; tail long; last vertebra free. The face is more clad with fur than in other species of this genus; fur of the body pale, straw brown above, pale buff beneath. For a fuller description and illustration, see Dobson's Monograph.
SIZE.—Head