OF WASHINGTON. 149 
hyp Hypopharynx. 
I, ang Inner angle of mandible 
L lyabrum. 
1 Lacinia. 
lh Labral hooks. 
1. art Labral articulation. 
lig .Ligula. 
Md Mandible. 
m. sh .Mandible sheet. 
mxf Maxillary foramen. 
ist. mx ist Maxilla. 
2d. mx 2d Maxilla, or labium. 
O Occiput. 
of Occipital foramen. 
oe (Esophagus. 
p Palpiger. 
pi Palpus. 
sm . Sub-mentum. 
sti Stipes. 
te .Taste palpi. 
v... . .Vertex. 
SOME NOTES ON THE PROVANCHER MEGACHILID^E. 
BY E. S. G. TITUS. 
Through the kindness of Abbe V. A. Huard, Curator of the 
Museum of the Department de 1' Instruction Publique, Quebec, 
Canada, I have had the opportunity of examining the speci- 
mens of the Megachilidae (now in the Museum at Quebec) upon 
which Abbe Provancher based his determinations. 
These specimens have been compared with the Cresson 
and other types at Philadelphia and with the collections in 
the National Museum at Washington. 
The only references given are those of Abbe* Provancher's 
articles and such others as directly relate to his writings. 
The types of the new species unless otherwise stated are in 
the Museum at Quebec. 
Megachile relativa Cresson. 
1882 : Le Naturaliste Canadien, v. XIII, p. 227, 232, n. 12, 9 
(Megachile optiva in part). 
