' Bulletin of the Scientific Laboratories of Denison University. 
Vol. XI. Article III. August, 1898. 
TABLES TOR THE DETERMINATION OF NEW 
MEXICO BEES. 
By T. D. A. Cockerell, 
Professor of Entomology in the New Mexico Agricultural College. 
The student should use E. T. Cresson’s Synopsis of the 
Families and Geiieta of Hymenoptera of America^ North of Mex- 
ico^ (1887), to determine the genera. Thirteen genera given 
herein which are absent from Cresson’s work may be deter- 
mined as follows : 
Hemikalictus, Ckll., is black, and resembles Halictus in structure, but has only 
two submarginal cells. 
Parandrena, Rob,, resembles Andrena, but has only two submarginal cells. It 
was formerly confounded with Panurgus. 
Protandrena^ Ckll., will run in Cresson’s table to Andrena, but differs in having 
the marginal cell truncate at the end. 
Halictoides, Nyl., has been confused with Panurgus, but it has a pointed mar- 
ginal cell, whereas that of true Panurgus is truncate. The long tongue 
■ separates it from Parandrena and Hemihalictus. 
Pseudopanurgus , Ckll., has been confused with Calliopsis, to whichjit will run in 
Cresson’s table. The species are black, nearly naked, strongly punctured, 
with the wings fuliginous ; marginal cell distinctly but obliquely trun- 
cate at tip ; two submarginals, first recurrent nervure joining second 
submarginal cell no great distance before its middle, second recurrent 
joining it just before its tip ; basal process of labrum large, subquadrate. 
Panurginus, Nyl., includes part of what has been known as Calliopsis, namely 
the black species with no abdominal hair-bands, or light marks on the 
abdomen ; and with yellow or yellowish-white’on the faces of the males, 
with few exceptions. 
Hesperapis, Ckll., has two submarginal cells, resembles Phileremus, but has a 
short dagger-like tongue. Mr. Ashmead refers it to Rhophitosdes, but the 
tongue is not at all as in that genus. 
Neolarra, Ashm., is a Phileremine bee, easily known by its very small margi- 
nal cell. 
Philereniulus , Ckll., is a minute bee resembling Neolarra, but with only one 
submarginal cell. 
Ashmeadiella, Ckll., has been confused with Heriades, but is known by its clear 
wings, small or subobsdete stigma, first recurrent nervure reaching sub 
marginal cell further from the origin of the first transverso-cubital, and 
the abdomen of the males ending with four projections. 
