432 PROCEEDINGS OF THE ACADEMY OF [April, 



Skull of adult male : Total length 26.8 mm. ; greatest zygomatic 

 width 12.3 ; interorbital width 4.9 ; height at base of second premolar 4 ; 

 height of brain-case 9.3; breadth of brain-case above roots of zygo- 

 mata 10; width of palatal constriction 2.3; length of palate from an- 

 terior foramina 11 ; width of palate including teeth 8.1 ; greatest length 

 of mandible 17.3. 



Remarks.- — True M. waterhousii can readily be distinguished by the 

 character given in the key. From the mainland forms the heavier 

 posterior limbs and the stronger skull and teeth will distinguish it. 

 From tv. minor the Haitian form can readilj^ be separated by the paler 

 coloration as well as the much greater size; from iv. jamaicensis by the 

 larger size and heavier teeth; from w. compressus by the broader 

 rostrum as w^ell as the subquadrate first lower premolar. 



Specimens Examined. — One skin and skull : San Domingo City, San 

 mingo. (Field Columbian Museum.) 

 Macrotus waterhousii jamaicensis n. subsp. 



1851. Macrotus Waterhousii Gosse, A Naturalist's Sojourn in Jamaica, p. 295, 



PI. 6, fig. 2. [Jamaica.] (Not of Gray.) 

 1878. Macrotus waterhousii Dobson, Catal. Chiropt. Brit. Mus., p. 464. 

 [Haiti; St. Domingo; Jamaica.] (Part.) 



Type.—MvXi ? ; Spanishtown, Jamaica. No. -^^'f^^, U. S. Na- 

 tional Museum. Collected by William Thomas March. 



Distribution. — The island of Jamaica, where according to Gosse 

 {vide supra) it is one of the commonest bats. Osborn, in Dobson (vide 

 supra), states that "when inhabiting houses these bats always live in 

 the cellars below ground, they are never found in the roofs." 



General Characters. — Similar to the Haitian M. waterhousii, but 

 differing in the duller coloration, the smaller skull and narrower and 

 weaker upper tooth-row. 



Head. — Ear quite large, much as in M. waterhousii, but the size is 

 greater, and the transverse pHcse more distinct ;- connecting membrane 

 rather high and with a distinct central emargination ; tragus as in M. 

 toaterhousii, but the apex is blunter. Nose-leaf and nose-pad broad, 

 the leaf acuminate with the apex rather broad and blmit. Lower hp 

 with the pad trigonal, the median cleft deep and very distinct. 



Limbs. — The forearm and tibia are structurally as in M. waterhousii, 

 but of sHghtly larger size; the thumb and foot are, on the other hand, 

 of smaller size. Calcanea short and stout. Tail distinctly projecting 

 beyond the interfemoral membrane. 



Fur. — Essentially as in M. waterhousii. 



2 This is hardly visible in the type skin, but quite distinct in alcoholic speci- 

 mens. 



