640 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 39. 



middle tooth short, and the broad inner one rudimentary; malar 

 space short but distinct; mesothorax and scutellum shining, well 

 punctured, but not very densely; tegulse dilute orange; wings hya- 

 line stained with reddish-brown; legs black with red spurs; hair on 

 middle basitarsus conspicuously red, on hind basitarsus dark fuscous; 

 abdomenwithouthair-bandsorspots, but withscanty long pale hair, and 

 fuscous subapically on fourth and fifth segments; last dorsal segment 

 with fine appressed hair. The flagellum is faintly reddish beneath. 



Habitat. — Japan; No. 134, probably collected by Mitsukuri. 



Type.— Cat. No. 13423, U.S.N.M. 



Closely related to 0. taurus Smith, from which it is known by the 

 absence of fulvous pubescence on head and thorax, and to 0. exca- 

 vata Alfken, which is, however, only 8^ mm. long. The area of the 

 metathorax is dull and without evident sculpture, and the abdomen 

 is rather long. As seen from above the general size and shape recalls 

 0. fulviventris Latreille, but fulviventris has a larger head, a blue- 

 black abdomen, and a brilliantly shining area of metathorax. 0. 

 fulviventris has an orange scopa, and the structure of its clypeus shows 

 a certain approach to the condition in 0. mitsukurii. 



OSMIA MATSUMURiE, new species. 



Male. — Length about 8^ mm. ; head and thorax very dark bluish- 

 green; abdomen dark olive green, the apical margins of the segments 

 extremely narrowly, hardly noticeably, testaceous; antennae long and 

 slender, black, last joint normal; face with abundant long white hair, 

 as also cheeks below; more or less pale hair on upper part of head, but 

 sides of front, vertex, and upper parts of cheeks with a good deal of 

 black hair; head and thorax quite closely punctured, scutellum less 

 closely; area of metathorax dull, without evident sculpture, some- 

 what shining in certain lights; hair of thorax long, slightly yellowish, 

 not mixed with black; tegulae piceous, slightly rufous in middle; 

 wings brownish-hyaline; recurrent nervures entering second sub- 

 marginal cell at about the same distance from base and apex, whereas 

 in 0. mitsukurii the first recurrent enters about twice as far from the 

 base as the second from the apex ; legs black with pale hair ; last two 

 tarsal joints ferruginous; hind basitarsus simple with ferruginous hair 

 on inner side; abdomen with scanty long hair like that of the thorax; 

 sixth segment entire, quite simple, not reflexed; seventh entire, 

 broadly truncate ; ventral segments quite simple ; stipites simple, with 

 a mere obtuse median angulation; notch in sagittal plate a little 

 longer than half breadth of plate. 



Habitat. — Sapporo, Japan (Matsumura). Apparently close to 0. 

 mitsukurii, but owing to the quite different tegulse and the venation 

 can not be its male. It is structurally similar to the male of 0. taurus, 

 and among European species to 0. hicornis Linnaeus. I 



Type.— C&t. No. 13424, U.S.N.M. 



