co bo 
a Oe 
11 (14). 
12 (13). 
13 (12). 
the classification of British Crabronidae. 389 
of the lower side of the cubital cell, the distance between 
its point of reception and the extremity of the transverse 
cubitus being usually only about equal to the length of 
the transverse cubitus itself. Antennae with the flagellum 
subfusiform or at least with many of the joints wide and 
flattened. Front legs very abnormal, the tibiae with 
enormous lamellate expansions, which are broader than 
long, tarsi distorted . . . . . Thyreopus, Latr. 
. Mandibles at the base with a prominent spine or process. 
. Mesonotum strigose tly, te ies oe DP ceribrariia, Kab; 
. Mesonotum punctate ~ 1 ee ay Es seuteltaius, Schr. 
. Mandibles at the base simple . . . TT. peltarius, Schr. 
. Ocelli arranged in an equilateral triangle or nearly ; recurrent 
nervure generally received near the middle of the cubital 
cell or at least much further distant from the end of the 
transverse cubital nervure than the length of the latter, 
very rarely with these distances not greatly unequal; 
antennae not conspicuously dilated or flattened; front 
legs with the tibiae rarely greatly dilated. 
. Superorbital foveae deep, distinct, narrow and elongate 
sublinear or elongate-triangular; legs simple. 
Blepharipus, Lep. 
. Clypeus in front with two great subprominent angles, which 
are very widely separated from one another. 
B. leucostomus, L. 
. Clypeus quite differently formed, produced in the middle 
apically . . . B. nigritus, Lep. (pubescens, Shuck.). 
. Superorbital foveae rarely distinct, deep and narrow, 
usually feeble or subobsolete, or represented by smooth 
spaces. If well-defined or deep they are short or broad 
or the front legs have some special modifications. 
Anterior area of propodeum ill-defined, not bounded com- 
pletely, or almost completely, or by a distinct consute or 
crenate furrow. 
Front legs with the tibiae and tarsi dilated. 
B. (2) cetratus, Shuck, 
Front legs simple, hind tibiae unusually incrassate. 
13 (a) (136). Clypeus produced into a strong median blunt tooth in 
the middle . .. . . . SB. (?) capitosus, Shuck. 
13 (6) (13a). Clypeus with the apical margin feebly 3-dentate, the 
i4 (11). 
TRANS. ENT. SOC. LOND. 1913. 
middle tooth not strongly prominent. 6. (?) styrius, 
Kohl. 
Anterior area of propodeum well defined by a usually 
consute or crenate furrow, rarely not altogether complete. 
PART I{, (SEPT.) CC 
