[Illustration: FIG. 7. Distribution of _Pteropus woodfordi_ ([BW]) and _P. mahaganus_ ([BC]). For names of islands see Fig. 2.] =Pteropus mahaganus= Sanborn 1931. _Pteropus mahaganus_ Sanborn, Publ. Field Mus. Nat. Hist., Zool. Ser., 18:19, February 12, type from Santa Ysabel, also reported from Bougainville; 1954, Laurie and Hill, List of land mammals of New Guinea, Celebes and adjacent islands, p. 39, June 30. _Specimens examined_ (one male and two females; one in alcohol).--Bougainville, in August and October, USNM 276972, USNM 277104-5. _Measurements._--Measurements of one male and two females are, respectively, as follows: Length of head and body, 180, 204, 198; hind foot, 42, 38, 44; ear, 25, 23, 22; length of forearm, 134, 138, 140. Measurements of the skull of the male and one female are, respectively, as follows: Greatest length of skull, 52.5, 55.8; condylobasal length, 50.9, 54.3; palatal length, 24.1, 26.0; zygomatic breadth, 28.9, 32.5; breadth across first upper molars, 14.4, 15.0; width of M1, 2.2, 2.2; length of maxillary tooth-row, 17.4, 18.4; length of mandibular tooth-row, 20.1, 21.4. _Remarks._--Sanborn (1931:19-21) described _Pteropus mahaganus_ on basis of six specimens, five from Santa Ysabel and one from Bougainville. The latter was in poor condition and only provisionally allocated to this species. The specimens examined by me (listed above) confirm the occurrence of _P. mahaganus_ on Bougainville. Sanborn (1931:20) described _mahaganus_ as "similar to and about the size of [_Pteropus scapulatus_] from Australia, but lighter in color," and considered it, along with _P. woodfordi_, a member of the _Pteropus scapulatus_ group of Andersen (1912:402) and Tate (1942:336). I would judge, however, that _P. mahaganus_ and _P. woodfordi_ are much more closely related to one another than to _P. scapulatus_ of Australia. The only significant characteristic that the latter has in common with the two species from the Solomons is small cheek-teeth. In fact, teeth of _scapulatus_ are relatively smaller than teeth of either _mahaganus_ or _woodfordi_. Also, in _scapulatus_ the upper canines are widely separated due to lateral expansion of the palate at that point, whereas in _mahaganus_ and _woodfordi_ the width across the upper canines is relatively much less. =Dobsonia= Palmer 1898. _Dobsonia_ Palmer, Proc. Biol. Soc. Washington, 12:114, April 30. 1810. _Cephalotes_ (part) É. Geoffroy, Ann. du Mus. d'Hist. Nat., 15:104. _Dobsonia_, a genus of large to medium-sized fruit bats, occurring from Celebes to the Solomon Islands, contains at least nine species. One species and its two subspecies are endemic to the Solomons. _Dobsonia_ differs from all other genera of megachiropteran bats in the Solomons by combining absence of a small claw on the second digit and presence of external tail vertebrae.