40 [April 



Hah. — Rocky Mountains, Colorado Territory. One specimen. (Coll. 

 Ent. Soc. Philadelphia.) 



This species probably belongs to the genus under which it is placed, 

 as the maxillary palpi have but two joints, and the wings have the 

 second recurrent nervure received a little beyond the apex of the 

 second submarginal cell. The general appearance is similar to an 

 Osmia, but the head is narrower than the thorax and the abdomen is 

 without a ventral scopa. 



Genus XYLOCOPA. Fabr. 

 3. Xylocopa californica, n. sp. 



Female. — Head large, as wide as the thorax, black, slightly tinged 

 with blue and green, especially on the cheeks, sparsely clothed with 

 short black pubescence, that on the lower portion of the cheeks much 

 longer; face flat, closely and conflueutly punctured, the punctures on 

 the vertex stronger, those on the cheeks sparse ; on each side of the 

 face a deeply impressed longitudinal line commencing at the insertion 

 of each antenna and ending on the lateral margin of the clypeus; on 

 the middle of the clypeus a short, smooth, slightly elevated, longitudi- 

 nal line, anterior margin truncate, smooth and polished ; anterior mar- 

 gin of the labrum smooth, polished, with a small, square, emarginate 

 process in the middle ; mandibles smooth, polished, with a small patch 

 of punctures near their base, the outer and inner margins channelled, 

 the apex obtuse and slightly emarginate ; the extreme lower orbits of 

 the eyes, at the base of the mandibles, flattened, smooth and polished. 

 Thorax clothed with rather dense black pubescence, closely and deeply 

 punctured, except the disk above which is smooth, polished and with- 

 out pubescence; beneath bluish-green, above black and on each side of 

 the disk between the wings, where the surface is punctured, it is iride- 

 scent ; middle of the mesothorax in front with a finely impressed lon- 

 gitudinal line which becomes obsolete before reaching the posterior 

 margin ; scutellum closely punctured, golden-green. Legs bluish-green, 

 clothed with black pubescence. Abdomen dark-green, with a blue and 

 purple reflection, polished, sparsely punctured, the sides of the apical 

 segments more closely and deeply punctured ; disk of the apical seg- 

 ment with two oblique pubescent carina, meeting posteriorly and 

 diverging anteriorly ; this segment, as well as the fifth, fringed with 



