138 The Philippine Journal of Science i9i8 



description it was stated that the ventral scopa was white, 

 black on last segment; however, with a compound microscope 

 it can be seen that the hair is orange subapically. The Davao 

 females have the scopa (except basally and apically) very bright 

 orange-fulvous and approach M. subrixator. Megachile valdezi 

 and subrixator are very closely related and may be only races 

 of one species. I formerly referred both to the Formosan M. 

 abluta Cockerell as races. 



Megachile subrixator (Cockerell). 



Megachile abluta subrixator Cockerell, Ann. & Mag. Nat. Hist. (1915), 

 VIII, 15, 535. 



• Mindanao, Iligan (type locality), Dapitan, Davao, Zamboanga. 

 Negros, Cuernos Mountains. Luzon, Laguna, Mount Maquiling 

 and Los Bafios : Bataan, Mount Limay. All from Baker. 



Megachile robbii Ashmead. 



Megachile robbii Ashmead, Proc. U. S. Nat. Mus. (1904), 28, 128; 

 Cockerell, Proc. U. S. Nat. Mus. (1909), 36, 415. 



Luzon, Manila. I examined Ashmead's type in the United 

 States National Museum. 



Megachile albobarbata Cockerell. 



Megachile albobarbata Cockerell, Ann. & Mag. Nat. Hist. (1915), 

 VIII, 16, 488. 



Mindanao, Dapitan (from Bake)-) . Allied to the Australian 

 M. mystacea (Fabricius). 



Megachile navicularis sp. nov. 



Male. — Length, 7.5 to 9.5 millimeters, rather slender; black, 

 with pale ocherous pubescence, pure white on lower part of 

 cheeks and pleura and on femora (dense on underside of anterior 

 pair) ; anterior coxse with short spines; anterior tarsi fringed 

 with long white hair behind, the basitarsus black with a long yel- 

 low boat-shaped process, extending its whole length and a short 

 distance beyond its end, small joints of the tarsus ferruginous; 

 face covered -^vith pale golden or whitish hair; antennse black, 

 simple ; vertex very densely and minutely punctured ; mesothorax 

 and scutellum dull and granular ; no distinct hair band in scutello- 

 .mesothoracic suture ; tegulse reddish, fuscous basally ; wings 

 dusky; abdomen with apical and subbasal pale hair bands, but 

 no subbasal one on second segment; fifth segment with basal 

 two-thirds covered with whitish tomentum ; sixth densely covered 

 dorsally with pale yellow tomentum, the transverse keel dentic- 

 ulate and emarginate in middle. 



