440 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



Geographic distribution.— Siumsxi Island, and probably Simalur. 



Diagnostic characters. — A medium-sized member of the genus 

 somewhat intermediate between Megaderma trifolium and Mega- 

 derma lasiae, particularly with respect to portion of maxilla covering 

 root of canine. 



Color. — ^Type: Upper parts of body, free ends of hairs similar to 

 benzo browm, basal portions deep quaker drab, under parts of same 

 general style of coloration but lighter, the free ends of the hairs 

 becoming mouse-gray; the hairs about the head and upper parts of 

 neck inchne to buffy brown, ears and membranes blackish brown 

 except tips of wings hghter. 



Sliull and teeth. — ^The skull for the most part is essentially hke that 

 of Megaderma trifolium, but is shghtly heavier, especially about the 

 rostrum, the roots of the canines are cUstinctly larger and heavier, 

 but not nearly so enlarged as they are in Megaderma lasiae. The 

 entire skull is distinctly smaller than that of the latter species. Aside 

 from the enlarged roots of the canines the teeth of Megaderma siuma- 

 tis are plainly Hke those of M. trifolium, and much smaller than 

 those of M. lasiae. 



Measurements.— Tjipe: Head and body, 75 mm.; forearm, 59; 

 tibia, 32; foot, 19; width of rostrum at apex, 22.5; condylobasal 

 length, 10.4; maxillary toothi'ow, 9.5. 



Specimens examined. — Three, all from Pulo Siumat. 



Remarks. — In view of the closeness of Siumat to the large island 

 Simalur it is not unhkely that Megaderma siumatis occurs on both 

 islands. It may be rather closely related to Sumatran examples of 

 M. trifolium, of which there are no specimens in the United States 

 National Museum, comparisons having been made with Javan and 

 Peninsular examples. 



MEGADERMA NIASENSE, new species. 



Type-specimen.— No. 141305, U.S.lN.M., adult male, preserved in 

 alcohol, collected on Pulo Nias (IVIojeia River), March 15, 1905, by 

 Dr. W. L. Abbott; original number 4066. 



Geographic distribution. — Nias Island. 



Diagnostic characters. — One of the smallest members of the genus, 

 forearm 55 mm., greatest length of skuU, 25.5; portions of maxillae 

 covering roots of canines rather slender. 



CoZor.— (Specunen dried from alcohol.) Tips of hairs of upper- 

 parts, hair brown to drab, bases of hairs deep quaker drab, hairs of 

 underparts similar but in general lighter; membranes in general some- 

 thing Hke warm sepia, except for distinctly lighter tips of wings ; ears 

 same general color as membranes but lighter. 



Skull and teeth.— The skull for the most part is essentiaUy shnilar 

 to that of Megaderma trifolium, but is slightly less heavy, with portion 



