xv . 1 Cocker ell: Metallic-colored Halictine Bees H 



male; Cagayan (Baker), male. The male has the form of a 

 female, as in certain Australian species, and the only conspicuous 

 differences are in the longer antennae and the caudal end of the 

 abdomen. 



Halictus subpurpureus sp. no v. 



Female. — Length, about 6.5 millimeters; head very dark 

 greenish, almost black ; mandibles rufous at apex ; clypeus feebly 

 and sparsely punctured; supraclypeal area purplish; front with 

 a sericeous luster ; antennae entirely black ; mesothorax yellowish 

 green, shining but not polished, without evident punctures ; scu- 

 tellum and hind margin of mesothorax glaucous green; area of 

 metathorax large, with a very fine irregular reticulation; pos- 

 terior truncation not sharply margined at sides; tegulae dark 

 brown; wings dusky, stigma black; first recurrent nervure 

 meeting second transverse cubital ; third submarginal cell narrow, 

 quadrate, shaped nearly like the second; legs black; abdomen 

 dorsally shining without bands and without evident punctures, 

 the general color black, but the base greenish and the middle 

 segments conspicuously suffused with purple; venter with large 

 tufts of pale ocherous hair at the sides of the segments. 



Luzon, Baguio, Benguet (Baker). Related to H. pervarians, 

 but larger, with mesothorax more shining, and abdomen suf- 

 fused with purple. 



Halictus pervarians sp. nov. 



Female. — Length, about 5.5 millimeters; head rather small, 

 glaucous green; antennae black; mesothorax and scutellum 

 yellowish green, shining but not polished, without evident punc- 

 tures; mesothorax with a median longitudinal depression; area 

 of metathorax appearing dull and granular under a lens, the 

 broadly rounded margin shining; tegulae pale brown, dark at 

 base; pleura bluish green; wings faintly dusky; stigma black; 

 first recurrent nervure meeting second transverse cubital; third 

 submarginal cell short ; outer nervures of third submarginal and 

 outer discoidal cells weakened; legs black; abdomen without 

 bands, black with a greenish or brassy tint. Ventral segments 

 of abdomen with lateral ocherous tufts as in H. subpurpureus. 



Variety a. Front peacock green and supraclypeal area purple. 

 Variety b. Length, about 5 millimeters; tegulae pale testaceous; tarsi 



ferruginous; stigma brown. 

 Variety c. Flagellum reddish beneath; mesothorax and scutellum very 



dark green; area of metathorax dark bluish. Stigma black as in 



the typical form. 



