17,2 
Cockerell: Bees from Sandakan, Borneo 229 
BEES RECORDED FROM PALAWAN 
Prosopis palavanica Cockerell.* 
Halictus  philippinensis Ash- 
mead. 
Halictus caroli Cockerell.* 
Nomioides valdezi Cockerell. 
Nomia quadrifasciata notha 
(Cockerell). 
Nomia strigata (Fabricius). 
Nomia lusoria Cockerell.* 
Nomia elongatula Cockerell. 
Nomia palavanica Cockerell.* 
Nomada palavanica Cockerell.* 
Dianthidium minutissimum 
-(Bingham). 
Megachile tarsatula Cockerell. 
Megachile philippinensis Friese. 
Ceratina philippinensis Ashmead. 
Ceratina philippinepsis nigrola- 
teralis Cockerell.* 
Ceratina humilior (Cockerell).* 
Ceratina fuliginosa Cockerell.* 
Xylocopa nigrocoerulea Smith. 
Xylocopa fuliginata Pérez. 
Xylocopa mimetica Cockerell.* 
Mesotrichia amauroptera (Pé- 
rez) .* 
Mesotrichia sulcifrons (Pérez) .* 
Mesotrichia vachali (Pérez) .* 
Mesotrichia latipes basiloptera 
Cockerell.* 
Trigona palavanica Cockerell.* 
Trigona luteiventris Friese. 
Apis florea rufiventris Friese. 
Thus Palawan has twenty-six recorded species, about half not 
known elsewhere. Only three of these species are in the San- 
dakan list, and two of these occur elsewhere in the Philippines. 
The third, Apis florea, is represented by a distinct variety. 
Dianthidium, a genus found at Sandakan, is recorded in the 
Philippines only from Palawan. Palawan has two species of 
Trigona, while only a single species is known from elsewhere 
in the Philippines. Although these lists are very incomplete, it 
is evident that the bee fauna of Palawan is not closely related 
to that of Sandakan. About a quarter of the Sandakan species 
are known from the Philippines, excluding Palawan. About a 
third of the Palawan species are known:from other Philippine 
Islands, but it is possible that some of these, nesting in wood 
or stems of plants, may have been accidentally introduced by 
man. The present indications are, then, that the bee fauna of 
Palawan is largely endemic, and has more resemblance to that 
of the other Philippine Islands than to that of North Borneo. 
1721787 
