BRACHYRRHYNCHUS.—COLOBORRHYNCHUS. 105 
with shorter second joint, the shorter and less acute antenniferous processes, the flatter 
pronotum, with the sides less deeply sinuate, the more rounded apex of the corium, 
and the more parallel general shape. B. nanusis also very like Nannium elongatulum, 
Bergr., from Venezuela, but has the first three spiracles more distant from the margin, 
the third antennal joint more cylindrical, and the antenniferous processes and the post- 
ocular spines more obtuse. 
19. Brachyrrhynchus divisus, n. sp. (Tab. VII. fig. 10, 9.) 
2. Oblong-ovate, piceo-ferruginous, the legs and antenne obscure ferruginous ; the membrane lurid, luteous 
round the apex of the corium, the nervures fuscous; the upper surface granulate, the connexivam 
rugulose, and sparsely clothed with extremely short, curled, ochraceous hairs, the connexivum partly 
coated with a pallid incrustation beneath ; the legs and antenn indistinctly pubescent. Head (exclusive 
of the apical process) transverse, somewhat rounded behind; the apical process broad and convex, 
reaching as far as the middle of the first antennal joint, emarginate at the tip; the spiniform antenni- 
ferous processes acute, slightly divergent; the post-ocular portions dilated laterally into a stout spine, 
which extends outwards to beyond the eyes; antenne short, moderately stout, with very stout basal 
joint, joints 1 and 3 subequal in length, 2 slightly shorter than 4, 1 roughly granulate, 4 oblong-ovate. 
Pronotum feebly emarginate at the base, constricted at the sides, the two portions separated by a rather 
deep transverse groove, the margins crenulate; the anterior portion dilated on each side into a broad 
rounded lobe, the four callosities each with a prominent ridge; the posterior portion much broader, 
flattened, rounded at the sides anteriorly and subparallel behind. Scutellum with an indistinct 
median ridge. Corium reaching nearly to the middle of the second segment, rounded at the 
apex, and obliquely truncate within. Connexivum rounded at the sides behind, the sixth segment 
emarginate at the apex, leaving the first genital segment narrowly exposed, the latter with two short 
rounded lobes. Beneath rugose, dull; the venter feebly convex, each segment with an oblong smooth 
spot in the middle. Legs short, stout, the femora granulate. 
Length 6, breadth 23 millim. 
Hab. Guatumata, Zapote (Champion). 
One example. This small species somewhat resembles the North-American 
B. granulatus (Say); but it has much stouter antenne, in this respect approaching 
B. emarginatus and B. rugicornis, differing from both these insects in the constricted 
pronotum, the shorter legs, &c., as well as in size. ‘The two portions of the pronotum 
are separated by a rather deep transverse groove, the anterior port on having four 
prominent ridges. 
COLOBORRHYNCHUS, n. gen. 
Head (exclusive of the apical process) transverse, obliquely narrowed behind the eyes, with spiniform 
antenniferous processes and a moderately long apical process, which is feebly emarginate at the tip; 
antenne with joint 1 stout, and longer than the apical process, the other joints more slender; rostrum 
short, not extending beyond the base of the head. Pronotum transverse, sinuate at the sides, very feebly 
emarginate at the base, and truncate at the apex; the anterior portion with a curved longitudinal ridge 
on each side midway between the flattened inner callus and the margin, and extending forwards 
to the slightly raised anterior margin. Scutellum triangular. Corium reaching about as far as the 
middle of the second connexival segment, its apical margin truncate. Membrane with a few prominent 
nervures. Connexivum broad. Spiracles on the first three segments distant from the margin, those on 
the following segments marginal, the last two visible from above. Legs very short, granulate, the 
femora smooth on their inner face, the tibiee and tarsé slender. Surface granulate, the connexivum 
smoother. 
BIOL. CENTR.-AMER., Rhynch., Vol. II., June 1898. 14 
