The type specimen of this subspecies is a subadult and is smaller than the specimens examined by me; Andersen (1912:440) gave length of forearm of the type as 137 (as opposed to 164 in adults). He (1912:438) figured the dentition of _anceps_ and described the ways in which it differed from the dentition of _atrata_. Although he (1912:437) concluded that _anceps_ and _atrata_ represented "two stages of specialization of ... dentition," there apparently are few, if any, dental differences between the two subspecies. Teeth of adults of _anceps_ differ from teeth of the immature type of _anceps_ as follows: in adults the anterior basal ledge of P4 extends onto the labial surface, whereas in the type it does not; and maxillary and mandibular teeth in adults are spaced as in the subspecies _atrata_ (see Andersen, 1912:438, fig. 22) and not crowded as in the type of _anceps_. Distance between individual cheek-teeth apparently increases with growth of the cranium and mandible. Adults of _P. a. anceps_ that I examined are darker than the subadult type. The mantle in these adults is black, whereas it is seal-brown in the type (Andersen, 1912:439). An adult female was lactating when obtained on Bougainville in July (USNM 276928). Key to _Pteropus_ in the Solomon Islands 1. Premolars having distinct basal ledges; molars 2.5-4.0 wide 2 1'. Premolars lacking definite basal ledges; molars 1.0-2.4 wide 14 2(1). Rostrum unshortened (orbit to anterior tip of nasals about one-third greatest length of skull); dorsal surface of tibiae nearly naked 3 2'. Rostrum shortened (orbit to anterior tip of nasals less than one-third greatest length of skull); dorsal surface of tibiae usually at least partially furred 8 3(2). Forearm more than 128 4 3'. Forearm less than 128 5 4(3). Forearm about 155; venter and dorsum nearly black, mantle pale yellow =P. tonganus geddiei=, p. 798 4'. Forearm 128-136; venter and dorsum near Mars Brown, mantle Ochraceous or Cream-Buff =P. hypomelanus luteus=, p. 796 5(3'). Mantle dark, russet or cinnamon, not strongly contrasting with color of back =P. admiralitatum solomonis=, p. 796 5'. Mantle pale, Ochraceous-Buff or Cream-Buff, strongly contrasting with color of back 6 6(5'). Mantle Ochraceous-Orange to Ochraceous-Buff, hairs pale basally; forearm 108-111 =P. admiralitatum goweri=, p. 797 6'. Mantle Ochraceous to Cream-Buff, but hairs dark brown basally; forearm 110-122 7