1897.] NATURAL SCIENCES OF PHILADELPHIA. 343 



thorax. Pubescence of head entirely black, except a yellowish- 

 ivhite fringe on occipital margin ; of thoracic dorsum cream-colored, 

 with longer black hairs intermixed ; of sides of thorax black ; a cream- 

 colored tuft on tubercles and one behind wings, but the hairs of 

 sides of metathorax below that black. Pubescence of legs black, 

 shining fuscous on inner side of anterior tarsi. Pubescence of first 

 abdominal segment cream-color, not mixed with black, of the re- 

 maining segments black, scopa wholly black. Tegulse black. Wings 

 dull hyaline, with the broad apical margin and the marginal cell 

 conspicuously darkened. Second submarginal cell a little longer 

 than first on cubital nervure; first recurrent nervure joining second 

 submarginal cell a little before the end of the basal third, second at 

 the beginning of the apical sixth. Punctuation strong and quite 

 dense on head and thorax ; sparse on abdomen. Anterior margin of 

 clypeus truncate, crenulated or ribbed, the sides of the truncation 

 sloping away, the angle at the corners a very obtuse one. Apical 

 tooth of mandibles very long, curved. Spurs of hind tibice rather 

 slender and straight. 



Hab.—Fasco, Wash., May 25, 1896 (T. Kincaid). Closely 

 allied to several species. From subor>uda it may be known by the 

 somewhat larger size, the blue tint of the abdomen, the long apical 

 tooth of mandibles, the straight and more slender spurs of hind 

 tibiae, the absence of the black dorsal pubescence of the thorax, etc. 

 From bucephala and megacephala by the smaller head, entirely 

 black pubescence of face, etc. : from nigrifrons by the larger size. 

 It agrees very nearly with Cresson's description of nigrifrons, and 

 may represent a northwestern subspecies of that insect. 



Osmia grandior n. sp. 



9 . Leugth about 16 mm. Closely resembles 0. pascoensis in all 

 respects but the following : Head smaller; clypeus dull and rough- 

 ened (in pascoensis shiny, with well sej:>arated punctures) ; apical 

 tooth of mandibles shorter ; two conspicuous brushes of orange hair 

 beneath the margin of the clypeus ; vertex with smaller and closer 

 punctures ; vertex and whole of thoracic dorswn covered with pale 

 fulvous hair, rather dense and not mixed with black ; brush of hairs 

 behind wings black ; metathorax tinged with bluish ; pubescence of 

 first abdominal segment black with pale hairs intermixed ; appressed 

 pubescence of last segment fuscous ; pubescence of first four tarsi 

 shining reddish fulvous; marginal cell and second submarginal 



