128 The Philippine Journal of Science isis 



2. With yellow or reddish tegumentary markings; foot with a pulvillus, 



or pad, between the claws Dianthidium Cockerell. 



Without pale tegumentary markings 3. 



3. Very small bees, wth a pulvillus between the claws; face with no pro- 



tuberance; ventral scopa white Heriades Spinola. 



Larger bees; or, if small, without any pulvillus 4. 



4. Marginal cell sharply pointed at end ; face, in female, with a protuberance, 



end of male abdomen pointed Lithurgus Berthold. 



Marginal cell obtuse at end; end of male abdomen variously formed; 

 no pulvillus on foot Megachile Latreille. 



Genus COEHOXYS Latreille 



These bees are parasitic in the nests of Megachile. The 

 species at present known from the Philippines are separable 

 thus: 



Key to the Philippine species. 



Very large, the female about 22 millimeters long; head with fulvous pubes- 

 cence; wings very dark ducalis Smith. 



Under 20 millimeters, but female at least 13 millimeters; face with a median 



keel; hair of head white, at most slightly stained with fulvous. 



philippensis Bingham. 



Much smaller 1. 



1. Females 2. 



Males 4. 



2. Apex of abdomen obtuse 3. 



Apex of abdomen produced, acute genalis Cockerell. 



3. Apical ventral plate of abdomen truncate; thorax above with fulvous 



hair markings manilfe Ashmead and bakeri Cockerell. 



Apical ventral plate subangular, emarginate; markings on thorax white. 



cothura Cockerell. 



4. Legs red; pubescence fulvescent... manilse Ashmead and bakeri Cockerell. 

 Legs black 5. 



5. Punctures of mesothorax extremely dense; two bright hair spots at base 



of scutellum luzonicus Cockerell. 



Punctures of disk of mesothorax distinctly separated 6. 



6. Mesothorax anteriorly with a conspicuous fulvous triangle of hair. 



bakeri var. atripes Cockerell. 

 Mesothorax without such a triangle 7. 



7. Tegulae black or piceous genalis Cockerell. 



Tegulae rufous; very .small, a little over 6 millimeters long. 



dapitanensis Cockerell. 

 Coelioxys ducalis Smith. 



Coelioxys ducalis Smith; Cockerell, Ann. & Mag. Nat. Hist. (1914), 

 Vin, 13, 146. 



Bingham gives a colored figure of this species.^ 

 Luzon, Laguna, Los Baiios (Baker) . Friese describes a subsp> 

 flavipennis from Celebes. 



'Fasciculi Malayenses, Zoology (1905), 3, PL A. 



