1897.] NATURAL SCIENCES OF PHILADELPHIA. 337 



Osmia calla n. sp. 



$. Length 8 to 9 mm., stoutly built, Aug ochlora- green. This 

 almost exactly resembles the Olympia form of bella, but is, per- 

 haps, a very slightly yellower-green, while the dorsal pubescence of 

 the abdomen is entirely white, and the second submarginal cell is not 

 longer than the first on the cubital nervure. The ocelli are a little 

 further apart, and the teeth of the seventh abdominal segment seem 

 to average longer. The pubescence of the inner side of the basal 

 joints of the tarsi is fuscous, not black. 



Other distinguishing features of 0. calla are as follows : Pubes- 

 cence throughout dull white, sometimes perceptibly tinged with 

 ochraceous, nowhere mixed with black. Antennae entirely black ; 

 clypeus ordinary. Punctures of mesothorax very close ; teg idee 

 wholly green ; basal area of metathorax ill-defined, minutely rough- 

 ened, not shining; wings smoky-hyaline, first recurrent nervure 

 joining second submarginal cell at about the end of the basal third, 

 second not far from the apex ; legs green, tarsi piceous; sixth ab- 

 dominal segment notched feebly or quite distinctly, but never entire ; 

 second ventral segment large, purplish, rather densely fringed at 

 apex with pale ochraceous- tinged pubescence. 



Bab.— Olympia, Wash., 3 $, May 25th and June 17, 1894 (T. 

 Kincaid). This has much the characters of $ kincaidii, but is 

 conspicuously larger and bulkier than the largest males of that spe- 

 cies. The antenna? in kincaidii are longer in proportion to the size 

 of the head. While in color and length 0. calla agrees with $ 

 fulgida from Colorado, calla is much broader than fulgida, so that 

 the two have quite a different appearance. The breadth of the ab- 

 domen in calla is 3 mm., in fulgida $ 2h 



Osmia bruneri n. sp. 



9 . Length 9 mm., brilliant blue-green, the clypeus, legs and 

 margins of abdominal segments shining purple. This may be only 

 a race of cobaltina, from which it differs in being green instead of 

 blue. The pubescence and ventral scopa are black, but dirty white 

 hairs are intermixed slightly on the vertex, quite conspicuously on 

 the dorsum of thorax, and also on the first abdominal segment. 

 Compared with the Pasco cobaltina, the spurs of hind tibia? are con- 

 siderably larger- and stouter, curved at the end, and the submargi- 

 nal cells are both longer. The wings are strongly infuscated, and 

 the second submarginal cell is, perhaps, a little longer than the first 

 on the cubital nervure. 



