266 Mr. T. D. A. Cockerell — Descriptions and 



white hair. Abtlonien shining, the hind margins of segments 

 subpiceous ; no distinct hair-bands. 



$ . — Length the same, but more robust. 



Cljpeus black, dull, and hairy ; facial fovese white-haired, 

 rather narrow ; abdo;nen with conspicuous white liair- bands 

 at sides of segments 2 to 4; liair at apex tinged witii greyish 

 brown. 



Mouth of Gregory Canyon, Boulder, Colorado, end of 

 April and beginning of May, at flowers of Salix, taken by 

 Mr. Albeit Holzman and Miss Elsie M. Foster. 



M. microchlora is a member of the subgenus Opandrena, 

 closely related to A. zizice, Robertson, from which it is easily 

 separated in both sexes by the dark autennae and tegulse. 



Osmia dulti, sp. n. 



(J . — Length 6 "5 mm. 



Olive-green, the head and thorax with long hair, nowhere 

 hiding the sculpture, dorsally and on face pale fulvous, ven- 

 trally white; eyes green; antennse simple, not unusually 

 long, the last eight joints red or reddish beneath ; mandibles 

 black, sharply bidentate ; face and front extremely densely 

 rugoso-punctate, the front dull, but the vertex shining 

 between the punctures, with a small smooth area laterad of 

 each lateral ocellus ; mesothorax and scutellum shining, 

 strongly and very densely [mnctured, a little smooth space 

 in middle of scutellum ; nietathorax blue-green, the basal 

 area granular, not polished ; teguUe black. Wings pale 

 brown, stigma reddish, nervures daik fuscous. Legs mainly 

 green, the tarsi black, variably reddened apically ; iiind legs 

 simple ; spurs black. Abdomen shining yellowish green, the 

 segments beyond the second with thin inconspicuous hair- 

 bands; sixtii segment with the margin {)rojecting, quite 

 entire ; seventh bidentate. 



3 J, Murree Hills, Punjab, 7500 ft., May 1920 (Dutt). 

 Fletcher, nos. 64, 65, 66. 



In the Indian fauna nearest to O. kashmiren&is, Nurse, but 

 separated by the brown wings. It belongs to the subgenus 

 Chalcosmia, and superficially is exactly like 0. gallarum, 

 Spinola, from which it is readily separated by the structure 

 of the apex of the abdomen. Tlie seventh abdominal segment 

 is more like that of the American O. alrive.ntris, Cresson. 

 The insect is, in facf, quite of an American type. 



