rxERorus rttfus. 203 



two-thirds, deeply concave in upper tliird ; tip strongly attenuated, 

 subacutely pointed. Naked on both surfaces, except at base pos- 

 teriorly and anteriorly and along basal half of outer and -inner 

 margins. 



Wmr/s. — About 30 mm. apart at origin from sides of back. 



Intcrfemoral.—^'eW developed in centre (depth about 15 mm.), 

 but generally completely covered by overhanging hairs of rump. 



Fur. — Somewhat adpressed on back and rump, semierect on 

 nape of neck. Length moderate, 19-22 mm. on back, mantle, and 

 belly. Width of furred area of back about 58 mm. 



Above, humerus and jiroximal third or half of forearm (except 

 region round elbow, which is naked) covered with closely adpressed 

 hairs. Fur of back extending on lateral membrane for about 

 14 mm. beyond line of origin of membrane. Femur long-haired. 

 Short, thinly spread hairs along outer side of tibia almost to ankle ; 

 median upper surface of tibia naked on distal half, very thinly 

 haired or almost naked on proximal half. Interfemoral long- 

 haired in centre and laterally along proximal half of tibia ; inner 

 margin and region above calcar naked. 



Below, antebrachial membrane, lateral membrane along outer 

 side of forearm almost to carpus and between humerus and femur 

 covered with rather long, woolly hair. Tibia and interfemoral (its 

 central portion excepted) naked. 



Colour. — cJ ad. al., N. Madagascar, teeth almost unworn; 

 91.11.20.1 : — Back and rump a shade of dark brown approaching 

 seal-brown, thougli with a touch of vandyck-brown, chiefly owing 

 to the very short paler brown (almost russet) tips to the hairs, 

 these paler hair-tips rather more conspicuous on rump and inner 

 side of tibia than on back. — Breast and belly yellowish-buff; 

 individual hairs with long seal-brown bases and shorter yellowish- 

 buff tips ; dark base of fur qnite or almost completely concealed on 

 breast and belly, more or less showing through in anal region, 

 giving this latter a conspicuous brownish tinge ; flanks dark brown 

 varied with yellowish-buff tips to the hairs. — Mautle buff-yellow, 

 shading into deep orange-buff on sides of neck and foreneck ; short 

 concealed base of hair everywhere seal-brown. — Buff-yellow colour 

 of mantle shading gradually into yellowish buff on occiput, crown, 

 interocular space, and temporal region ; base of fur seal-brown. 

 Muzzle, as far back as region immediately above and behind eyes, 

 lower jaw, chin, and throat seal-brown, strongly contrasting with 

 yellowish-buff crown. 



Individual variation in colour. — Not great, chiefly dependent on 

 the greater or less intensity of the colours. Hack and rump some- 

 times almost pure seal-brown (short brownish hair-tips completely 

 absent), sometimes distinctly " powdered " with a paler brown 

 (brownish hair-tips more conspicuous) ; an extremely thin sprink- 

 ling with silvery whitish hairs occasionally detectal)le on close 

 inspection. — Bright colour of breast, belly, and crown varying from 

 pale glossy yellowish buff (almost buff) to a deep ochraceous-buft". 

 approaching ochraceous.^Mantle varying from buff-yellow through 

 ochraceous-buff to tawnv. 



