392 Mr. R. C. J. Perkins on 
spine on the underside of the head (clypeus with five 
emarginations, which produce six nearly equidistant 
teeth); all the legs simple ; superorbital foveae represented 
by smooth, slight callosities; mandibles bidentate, the 
inner edge edentate. 
Hoplocrabro, Thoms., H. 4-maculatus, Fab. 
THYREOPINAE, 
2°. 
1 (6). Ocelli in a triangle much widest at the base, recurrent 
nervure received by the cubital cell far beyond the 
middle of its lower side and at a distance from the apex 
subequal to (or at most rather longer or shorter than) 
the length of the transverse cubitus. Mandibles biden- 
tate at apex and without a tooth on the inner margin. 
Pygidial area flat, triangular, roughly punctured and 
setose ¢ niGe Wey acti bb Sin te UeOp Tine laeoe. 
(3). Mesonotum longitudinally rugose .  . 7. eribrarius, Fab. 
(2) Mesonotum punctured. 
4 (5). Lateral prothoracic angles not prominent. 
T. scutellatus, Schr. 
5 (4). Lateralanglesofpronotum prominent. 7’. peltarius, Schr. 
(1). Ocelli in a triangle that is equilateral or nearly; recurrent 
nervure generally received near the middle of the lower 
side of the cubital cell, very rarely at a distance from 
the apex subequal to the length of the transverse cubitus. 
Mandibles generally tridentate at apex (if bidentate, the 
species are very small and the abdomen is black) ; pygidial 
area often excavated, or shining though in some small 
species closely punctured and setose. 
7 (16). Anterior area of the propodeum not clearly defined by 
distinct and generally complete furrows, that are usually 
consute or crenate 
o> 
. . Blepharipus, Lep. 
8 (13). Mandibles at the apex tridentate; mesopectus spinose or 
tuberculate on each side, faintly so in cefratus. Super- 
orbital foveae deep or deepish, distinct and narrow. 
9 (12), Head above and mesonotum clothed with long or longish 
erect hair; mesosternum not polished and with a copious 
fine puncturation. 
10 (11). Head in front of the anterior ocellus more or less transversely 
depressed or sloping from the eye-margin to the median 
impressed line, the surface polished and more or less 
sparsely or irregularly punctured . 8. leucostomus, L. 
