232 BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 



Subfamily KBEIVOULIN^E. 

 1878. Vespertiliones Dobson, Catal. Chiropt. Brit. Mus., p. 168 (part). 

 1891. Vespertilionidw (part; Vespertilionine division, part) Flower and 

 Lydekkee, Mammals, living and extinct, p. 001. 



Geographic distribution. — Africa, south of the Sahara; India and 

 the Malay Region ; New Guinea. 



Characters. — Externally as in the Vespertilionhiae. Sternum very 

 short, its length in median line not twice as great as breadth of 

 presternum; median lobe of presternum small but distinct, upright; 

 keel of mesosternum low,. Only four or Ave ribs articulate with 

 sternum. Coracoid curved outward as in the Vespertilioninae. 



Remarks. — The peculiar, shortened sternum distinguishes this group 

 very readily from the other subfamilies of Vespertilionidse. 



Principal subdivisions. — The subfamily Kerivoulinse is represented 

 by two genera. 



KEY TO THE GENERA OF KERIVOULINSE. 



Upper canine normal ; middle lower incisor with three cusps. 



Kerivoula, p. 232. 



Opper canine with shaft elongated and laterally compressed; middle 



lower incisor with four cusps Pliouiscus, p. 233. 



Genus KERIVOULA Gray. 



1842. Kerivoula Gray, Ann. and Mag. Nat. Hist., X, p. 258, December, 1842. 



1849. Kirivoula Gervais, Diet. Univ. d'Hist. Nat., XIII, p. 213. 



1860. Nyctophilax Fitzinger, Sitzungber. Math.-Nat. CI. k. Akad. Wis- 



sensch. Wien, XLII, p. 390. 

 1878. Kerivoula Dobson, Catal. Chiropt. Brit. Mus., p. 330. 

 1891. Cerivoiila Blanford, Fauna Brit. India. Mnnim., p. 338. 



Type-species. — Vespertilio hardwichii Horsfield. 



Geographic distribution. — Africa, south of the Sahara; India and 

 the Malay Region ; New Guinea. 



Number of forrn.s. — Eighteen species of Keriroula are now rec- 

 ognized. 



Characters. — Dental formula : 



-23. 1. -234567 .2-2 1-1 3-3 3-3 



123 1. -234567 * 3-3' ° \-V^ m 3^3' '"' 3^3 =38 - 



Upper incisors well developed, the outer about half the height, though 

 of nearly the same diameter as inner, between which and canine it 

 is closely crowded; main axis of each tooth nearly perpendicular; 

 lower incisors trifid, slightly imbricated. Canines normal in form 

 and rather small, the point of the upper tooth extending slightly 

 beyond cingulum of lower when jaws are closed; lower canine with 

 small antero-internal cingulum cusp. Premolars well developed, but 

 not peculiar in form, those of mandible subequal, their crowns sub- 

 quadrate in cross section and without distinct cutting edges. Molars 

 normal ; m'andm 2 without hypocone, m s with metacone and three 



