OF WASHINGTON. 157 
1896: Dalla Torre, Cat. Hym. v . X, p. 394 (O. faceta, Pro- 
vancher references). 
One 9 specimen numbered 1 1 60 and labelled Osmia faceta 
has been compared with Smith's description and Cockerell's 
MS. notes on the type of 0. chalybea and is undoubtedly that 
species. Provancher records his species from Cap Rouge. 
Leucosmia albiventris Cresson. 
1882: Le Naturaliste Canadien, v. XIII, p. 207, 208, n. 2, 
9 (O. simillima in part). 
1883: Fauna Knt. Can. Hym. p. 707, 708, n. 2, 9 (O. simil- 
lima in part). 
1888: Add. Fauna Bnt. Can. Hym. p. 325, $, p. 466 (O. 
simillima in part); p. 325^ 327, n. n, $ p. 466 (O . albiventris) . 
1896: Dalla Torre, Cat. Hym. v. X, p. 384, 9 (O. albi- 
ventris, Prov. references); p. 410, 9 (O. simillima, Provan- 
cher references). 
One 9 numbered 1 1 6 1 and labelled Osmia simillima is refer- 
able to this species as is also a 9 correctly labelled and num- 
bered 1 163. O. albiventris is recorded by Provancher from Cap 
Rouge. The cT which he records I have not seen. 
Leucosmia parvula Dalla Torre. 
1882: Le Naturaliste Canadien, v. XIV, p. 37, n. 7, cT 
(Osmia parva). 
1883: Fauna Knt. Can. Hym. p. 812, n. 7, c? (O. parva). 
1888: Add. Fauna Knt. Can. Hym. p. 325, n. 7, o. 467 (O. 
parva) . 
1896: Dalla Torre, Cat. Hym. v. X, p. 405, cT (O. parvula, 
n. n. for parva). 
Length 4.5 mm. Small, blue-green, legs and antennae reddish fus- 
cous; pubescence very white, that on face and thorax very dense, sides 
of abdomen fringed, first and second dorsal abdominal segments with 
scant pubescence, front femora and tibiae with long white fringe, not 
so dense and shorter on other legs; punctuation fine and close, man- 
dibles very dark, two-toothed, spurs dark red, tegulae reddish; basal 
nervure before transverse median; claws deeply cleft; 6th and 7th 
dorsal abdominal segments deeply incised at apex, edge of 6th segment 
slightly turned up and ferruginous along the thin edge, the blue color 
of the segment runs out onto the points of the teeth, thus interrupting 
the ferruginous edge. 
Redescribed from one & specimen numbered 1062 and 
labelled Osmia parva. This is a very small species, very dainty 
in shape. No locality is given for the species. This was re- 
named by Dalla Torre on account of Radoszkowski's species 
parva 1874. 
