xv, 3 Cockerell: The Black Halictine Bees 217 



third submarginal cells about the same size, high and narrow, 

 together smaller than first; first recurrent nervure meeting 

 first transverse cubital; legs black, inner side of hind tarsi 

 with bright ferruginous hair; hind spur pectinate; abdomen 

 shining black, without evident punctures. The abdomen is like 

 that of H. melanurops. 



Luzon, Mountain Province, Baguio (Baker). This species 

 and the next two show a general relationship to some of the 

 Australian forms. On the other hand, H. baguionis Crawf. is 

 related to the Formosan H. pcrangulatus Ckll. ; so we have in 

 the Philippines a meeting place of northern and southern groups 

 of the genus. 



Halictus caroli sp. nov. 



Female. — Length, 6 millimeters; black, with broad abdomen; 

 hair of head and thorax white, abundant at sides of thorax and 

 long on clypeus; antennse black, with basal half of scape red 

 in front; inner orbits rather strongly concave; face and front 

 dullish; mesothorax and scutellum dull, without evident punc- 

 tures; area of metathorax dull and granular, a little shining at 

 apex, where there is a median sulcus; tegulae pale testaceous; 

 wings faintly dusky, nervures and stigma piceous; second and 

 third sumarginal cells high and narrow, about equal; first re- 

 current nervure joining second submarginal cell near end; legs 

 black, small joints of tarsi ferruginous; abdomen black, shining, 

 without bands or patches of tomentum; venter with a scopa of 

 long curled hairs, tinged with ocherous at sides. 



Palawan, Puerto Princesa; sent by Prof. C. F. Baker, after 

 whom it is named. 



Halictus mcgxegori sp. nov. 



Female. — Length, 7 millimeters; black, with broad abdomen; 

 hair of head and thorax scanty, but dense and dull white on 

 tubercles, and sides of metathorax with a conspicuous white 

 fringe; head broad, clypeus short; antennas black; supraclypeal 

 area strongly convex; face and front moderately shining; me- 

 sothorax and scutellum dull, without evident punctures; area 

 of metathorax large, entirely opaque, faintly striate at sides 

 toward base; posterior truncation hairy; tegulse ferruginous; 

 wings dusky, nervures and stigma piceous; second and third 

 submarginal cells high and narrow; first recurrent nervure 

 meeting second transverse cubital; legs black, hind tibise and 

 tarsi with black hair on outer side and fulvous on inner; hind 

 spur with a few large teeth; abdomen dullish, without band or 



