BRACHYRRHYNCHUS. 
6°. Pronotum constricted or moderately sinuate at the sides, 
the anterior lobes not or very slightly projecting in 
front. 
c°. The spiniform antenniferous processes long or moderately 
long. 
a’. Post-ocular spines long and acute, extending to beyond 
the eyes; apical process broad; connexivum () 
rounded at the sides posteriorly; terminal genital 
segment (¢) transversely cordate soe 
6". Post-ocular spines acute, extending about as far as the 
eyes; connexivum (') obliquely narrowed poste- 
riorly ; terminal genital segment (¢) cordate. 
a*, Femora coarsely asperate ; body moderately broad . 
6°. Femora finely asperate ; body narrow . 
c’. Post-ocular spines very short and inconspicuous ; body 
broad, ovate. . 2. 1. 6 1 ee soe ee 
d°. The spiniform antenniferous processes short ; post-ocular 
spines extending as far as the eyes . . . . 
c’. Pronotum feebly sinuate at the sides, the anterior lobes 
very slightly projecting in front . - ee . 
b’. Antenne relatively shorter, with joints 2-4 of more uniform thickness, 
4 ovate or oblong-ovate; rostrum short. Body not or very slightly 
incrustate, above clothed with very short curled hairs (sometimes 
very minute or abraded). 
ce’, Corium obliquely truncate at the apex; pronotum feebly sinuate 
at the sides and deeply emarginate in front; terminal genital 
segment (') transverse . 
ad”. Corium more or less rounded at the apex. 
f’”. Pronotum with the anterior and posterior portions not separated 
by a distinct groove. 
c*, The spiniform antenniferous processes long and acute; antennz 
with joints 2 and 4 subequal in length. 
d’. Post-ocular spines long, slender, and acute: length of the 
body over 8 millim. . 2 se ee 
e’. Post-ocular spines shorter and stouter : length of the body 
43 millim.. 2. 2. 1 1 ee ee ew ew ee 
d‘, The spiniform antenniferous processes short; pronotum 
flattened, feebly sinuate at the sides; antenne with joint 
2 shorter than 4: length of the body 4 millim. .. . 
g". Pronotum with the anterior and posterior portions separated 
by a deep transverse groove ; the lateral constriction deep . 
regularis, n. sp. 
neotropicalis, n. sp. 
angustatus, Q. sp. 
latus, n. sp. 
rugiventris, n. sp. 
mestus, Stal. 
emarginatus, Say. 
rugicorms, D. sp. 
yucatanus, 0. sp. 
nanus, D. Sp. 
divisus, n. sp. 
