1897.] NATURAL SCIENCES OF PHILADELPHIA. 339 



nervure ; first recurrent nervure joining second submarginal cell 

 nearly at the end of its basal third, second at the beginning of the 

 apical fourth or a little beyond ; legs black, basal joint of hind 

 tarsus broad, truncate at the end; sixth segment of abdomen with 

 the margin entire, seventh emarginate ; second ventral segment with 

 its hind margin fringed with long pale hairs, and presenting medially 

 a large and prominent tooth, directed backward, shaped like the term- 

 inal joint of a finger, but having a longitudinal groove. 



Hab. — Olympia, Wash., 5 $ , May 10th and 25th, June 1st and 

 13, 1894 (T. Kincaid). This might be taken for inurbana, but its 

 abdominal characters at once distinguish it. 



*e v 



Osmia nanula n. ap. 



9 . Length 7 to 8 mm. ; stoutly built, short, with the abdomen 

 broad-oval. Color of head, thorax and abdomen dark greenish- 

 blue ; legs, mandibles and antennee black. Pubescence black, with 

 ochraceous on sides of face, on occiput about tubercles, slightly on 

 mesothorax, quite densely alorig hind border of scutellum, on sides 

 of metathorax, on lateral hind borders of the first three abdominal 

 segments, especially the first, thinly along whole hind borders of 

 four and five, very sparsely on surface of sixth, and on first four 

 tarsi behind. The black hairs on the scutellum are considerably 

 longer than the ochraceous ones, and are placed in front of them. 

 Ventral scopa all black. Hairs on inner side of basal joint of hind 

 tarsi dark fuscous. Pubescence of clypeus black, sparse, its ante- 

 rior margin and the mandibles with some orange-rufous hairs. The 

 ochraceous pubescence of the thorax, in fresh specimens, is quite 

 bright, almost orange-rufous. 



Punctuation ordinary, punctures of vertex and mesothorax large, 

 very close, but not all confluent, the abdomen is quite shiny. Head 

 fairly but not excessively large, clypeus ordinary, mandibles triden- 

 tate ; tegulse shining black, with asubmetallic tinge in front: wings 

 dusky, broad apical margin and upper half of marginal cell con- 

 spicuously darker : second submarginal cell noticeably shorter than 

 first on cubital nervure ; first recurrent nervure reaching second 

 submarginal cell just before the end of its proximal third, second 

 very near its tip. 



Hab.— Seattle, Wash., 4 9 , April 17th, May 11th and 19th (T. 

 Kincaid) ; Olympia, Wash., 5 9 , May 23rd, June 1st, 19th and 

 30th (T. Kincaid). A 9 taken by Mr. Kincaid at Olympia, 



