xv, 3 Cockerell: The Black Halictine Bees 281 



Halictus davaonis sp. no v. 



Female. — Length, about 6.5 millimeters; black, differing 

 from H. fulvovittatus thus: Head broader; area of metathorax 

 with a double sculpture of exceedingly delicate striae all over 

 and coarse rugse basally; legs black, with red knees; pale mar- 

 ginal tegumentary bands on abdomen much narrower, those on 

 first two segments not enlarged in middle. 



Mindanao, Davao (Baker), 2. Closely related to the last, 

 but surely a distinct species. 



Halictus melanurops sp. nov. 



Female. — Length, about 7 millimeters ; black, with little hair ; 

 abdomen polished and shining, without bands or patches of 

 tomentum; head broad; clypeus dull basally, apically shining 

 and with large punctures; supraclypeal area dull; front dull, 

 densely punctured; sides of vertex closely punctured; antennae 

 black; cheeks striate, with a large polished shining space on 

 lower part; mesothorax and scutellum dullish, finely punctured, 

 the punctures very irregular on scutellum; area of metathorax 

 longitudinally plicate; posterior truncation shining, not sharply 

 bounded at sides; mesopleura dull; tegutee black; wings dusky, 

 stigma and nervures brown; first recurrent nervure meeting 

 second transverse cubital ; third submarginal cell not much larger 

 than second, both rather broad; legs black; hind tibiae with 

 fuscous hair on outer side and white hair on inner, hair on 

 inner side of hind basitarsi white; abdomen with stiff hair on 

 venter, but no curled scopa or lateral patches; along the apical 

 margin of the covered portion on dorsal segments 2 to 4 is a 

 very fine fringe of plumose white hairs, forming a very delicate 

 line. 



Male. — Very similar but smaller; clypeus all black; flagellum 

 elongated and submonilif orm, as in typical Halictus males ; tarsi 

 dark. 



Luzon, Mount Banahao (Baker), 1 female, type: Nueva Viz- 

 caya Province, Imugan (Baker), 1 female: Mountain Province, 

 Baguio (Bake?-) , 1 male. 



