. The families and genera of bats . Bats; Bats. THE FAMILIES AND GENERA OF BATS. 211. Genus HESPEROPTENUS Peters. 18(iS. Heftperoptcmis Peters, Monatsber. k. preuss. Akacl. Wissensch., Bei- lin, ii. (S26 (subgenus of Ycsttcrua). 1878. Hexiicroptenus Dobson, Catal. Chiropt. Brit. Mus., p. 183 (subgenus of \'cni>crugo). Type-species.—Vesperus dories Peters. Geographic distribution.—India and the Malay region. Number of forms.—Three species of Ilesperoptenus are now known: II. dorm (Peters), //. tickelli (Blyth), and II. Uanfordi Dobson. Characters.—Dental formula and general structure of teet
. The families and genera of bats . Bats; Bats. THE FAMILIES AND GENERA OF BATS. 211. Genus HESPEROPTENUS Peters. 18(iS. Heftperoptcmis Peters, Monatsber. k. preuss. Akacl. Wissensch., Bei- lin, ii. (S26 (subgenus of Ycsttcrua). 1878. Hexiicroptenus Dobson, Catal. Chiropt. Brit. Mus., p. 183 (subgenus of \'cni>crugo). Type-species.—Vesperus dories Peters. Geographic distribution.—India and the Malay region. Number of forms.—Three species of Ilesperoptenus are now known: II. dorm (Peters), //. tickelli (Blyth), and II. Uanfordi Dobson. Characters.—Dental formula and general structure of teeth as in Eptesicus and Vespertilio; but outer upper incisor much larger, the area of its base more than half that of ca- nine, which tooth, in its sim- ple, strong shaft and well- developed cingulum, it rather closely resembles; space be- tween inner incisor and ca- nine scarcely perceptible, barely greater than width of cingulum of canine; outer upper incisor closely crowded between canine and inner in- cisor, forced backward from the toothrow, and quite in- visible from the front; its crown scarcely reaching level of cingulum of the two neighboring teeth, but with area in cross section decid- edly more than half that of inner incisor, the surface of the crown basin-shaped, with a large, but low, central cusp; other teeth like those of Eptesicus, the third upper molar with less than half the crown area of first, but with the meta- cone and three commissures distinct though small. Skull (fig. 33) broad, the zygomatic breadth nearly equal to upper length in median line, but with no special peculiarities in form; basisphenoid pits well developed, though shallow. Externally as in Eptesicus. Species examined.—Ilesperoptenus tickelli (Blyth). Remarks.—It is with some hesitation that I apply the name Iles- peroptenus to the genus represented by II. tickelli. I have not seen "Vesperus " doricc, the type of Ilesperoptenus, and certain features in the original descr
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Keywords: ., bo, bookcentury1900, bookdecade1900, booksubjectbats, bookyear1907
