Genera of Wingless Brachyderine. 3 
longitudinal or oblique impressions, 
with a convex space between them. 
11 (12). The three median ventral segments 
subequal in length ; forehead trisul- 
cate; scape short and stout, the 
externally visible portion much 
shorter than the funicle; rostrum 
separated from tke head by a furrow 
that extends quite to the side .... 
12 (11). Second ventral segment longer than 
the third or fourth; forehead with 
at most a single furrow ; scape slen- 
der, the exposed portion almost or 
quite as long as the funicle. 
13 (14), Metasternum between the cox very 
much shorter than the middle 
cox; mandibles squamose, with a 
well-marked longitudinal dorsal 
carina running from the scar to the 
DASGN araa cote e/a dela: We ate reve 
14 (13), Metasternum as long as or only 
slightly shorter than the middle 
cox; mandibles without a dorsal 
carina. 
15 (16). Serobes strongly dilated behind ; scape 
not exceeding the middle of the 
eye; funicle and mandibles clothed 
with scales ; eyes finely facetted .. 
16 (15). Scrobes almost parallel-sided; scape 
reaching hind margin of eye; funicle 
and mandible entirely devoid of 
scales ; eyes comparatively coarsely 
facetted ..... re ge eee w Pat ae a 
) 
21). Corbels of hind tibie very oblique, 
lying almost entirely on the inner 
face of the tibia, their upper fringe 
of sete ascending the dorsal edge 
of the tibie in a straight line (as in 
Tanymecus) ; second ventral seeg- 
ment distinctly longer than the 
third or fourth, hind margin of the 
first more or less sinuate in the 
middle, the incision shallow. 
19 (20). Rostrum separated from the forehead 
by a stria; eyes very prominent and 
produced backwards ....... tisds.p 3 
20 (19). Rostrum continuous with the fore- 
head; .eyes simple, only slightly 
CONVER aed eerie s io Besielit tote whats « 
21 (18). Corbels of hind tibize terminal, not 
ascending the tibie; the three 
median ventral segments subequal 
in length, hind margin of the first 
seoment straight, the incision deep. 
22 (23). Corbels of hind tibize enclosed ; scape 
slender, clavate; forehead trisulcate ; 
Blosyrus, Schh, 
Proscephaladeres, Schh, 
Proscopus, gen. nov. 
[ Strophosomus, Billb. | 
Protostrophus, gen. nov, 
Leurops, gen, nov. 
1* 
