156 ENTOMOLOGICAL SOCIETY 
1896 : Dalla Torre, Cat. Hym. v. X, p. 385, 9 (Osmia atriven- 
tris, Prov. references). 
One 9 specimen bearing the number 1066 and marked 
Osmia atriventris belongs to Osmia simillima 9 I have had 
opportunity of consulting Prof. Cockerell's notes made on an 
examination of the type of O. simillima in the British Museum 
and am satisfied that this specimen belongs to that species. 
Provancher gives Toronto as the locality of capture. 
Osmia atriventris Cresson. 
1882: Le Naturaliste Canadien, v. XIII, p. 207, 208, n. 
2, 9 (O. simillima in part). 
1883: Fauna Hnt. Can. Hym. p. 707, 708, n. 2, 9 (Osmia 
simillima in part). 
1888: Add. Fauna Ent. Can. Hym. p. 325, 9, p. 466, 
(Osmia simillima in part); p. 325, 329, n. 15, o 1 , p. 467 (Osmia 
vicina) . 
1896: Dalla Torre, Cat. Hym. v. X, p. 410, 9 (O. simillima, 
Prov. references); o. 414, d* (O. vicina, Prov. references). 
A specimen numbered 1 161 and labelled, not with the regular 
oblong label used by Provancher, but on a narrow strip, Osmia 
simillima, can be referred to this species. Provancher reports 
O. simillima from "C." A cT numbered 1162, and labelled 
Osmia mcina appears to be the cf of atriventris. Provancher 
reports O. mcina from Ottawa at flowers of Cypripede. The 
9 is also listed by Provancher in 1888 under n. 15, but I have 
not seen the specimen. 
Osmia brems Cresson. 
1888: Add. Fauna Ent. Can. Hym. p. 324, 326, n. 8, 9, 
p. 466. 
1896: Dalla Torre, Cat. Hym. v. X, p. 388. (Provancher 
references only). 
One 9 numbered 868 and correctly determined. Reported 
from Cap Rouge by Provancher. 
Osmia nigrifrons Cresson. 
I have examined one 9 of this species in the Provancher 
material numbered 1526 and labelled O. nigrifrons. 
Melanosmia grandior Ckll. (Osmia longula Prov). 
In the Provancher material sent me there is a 9 numbered 
1525 and 13, and labelled Osmia longula, which is referable to 
Cockerell's O. grandior. 
Chalcosmia chalybea Smith. 
1888: Add. Fauna Ent. Can. Hym. p. 325, 326, n. 10, p. 466 
(Osmia faceta). 
