72 HEMIPTERA-HETEROPTERA. 
Scutellum with a thick callous margin at the sides, widening a little anteriorly. Abdomen oval, truncate 
at the apex ; the incrustation of the under surface projecting a little beyond the lateral margins towards 
the apex of each segment, their outer apical angles thus appearing somewhat prominent; the genital 
lobes moderately stout. 
Length 5, breadth 21, millim. 
Differs from the type (¢) in having the head, pronotum, and connexivum more 
thickly incrustate; the head broader, with the post-ocular portions swollen and 
projecting outwards to considerably beyond the eyes; the basal joint of the antenne 
a little more elongate ; the abdomen more rounded at the sides, the outer apical angles 
of each segment not projecting. Both specimens have a scar on the middle of 
the disc of the pronotum, suggesting the possibility of a portion of the incrustation 
being broken off. 
PSOROSOMA, n. gen. 
Head subquadrate, abruptly constricted into a short neck behind, with two long divergent frontal spines; the 
post-ocular portions rectangular, of about the same length and breadth as the eyes; the antenniferous 
processes long and stout, terminating in a straight spine ; antenne short, joint 1 stout, curved, extending 
as far as the apex of the frontal spines of the head, 2 slender, shorter than 1, thickened at the apex, 
3 very slender, about one-half longer than 2, constricted at the base and slightly thickened at the tip, 
4 piriform, half the length of 3; rostrum very short, not nearly reaching the base of the head. Pronotum 
very much wider than the head, as long as broad, broadly emarginate at the base for the reception of the 
basal portion of the triangular scutellum ; the posterior lobe short, transversely convex, arcuately dilated 
at the sides; the anterior lobe parallel, with five prominences in front (a median and two lateral on each 
side), the outer ones acute. Elytra reaching the apex of the fifth abdominal segment; corium extending 
to about the middle, gradually tapering behind; membrane with prominent nervures. Abdomen long 
and subparallel, a little wider than the pronotum, convex beneath; connexivum broad, the spiracles 
placed close to the outer margin and partly visible from above, the outer apical angles of the sixth 
segment produced posteriorly into a long triangular process. Legs rather elongate, the femora moderately 
stout and finely setose, the tibie: slender and clothed with very short hairs. Body narrow, elongate, 
not granulate, in great part covered by a thick pallid incrustation, which is moulded into irregular 
callosities on the head, pronotum, and scutellum. 
This genus, represented by a single species from the State of Panama, is nearest 
allied to Proxius and Carventus, differing from both in the structure of the head, 
antenne, &c. Its narrow, flattened, elongate shape and the bifurcate apex of the 
abdomen give it a Forficuliform appearance. 
1. Psorosoma forficulinum, n. sp. (Tab. V. figg. 15,2 ; 15a, antenne. ) 
Q. Obscure testaceous, the head, the pronotal and scutellar callosities, and the connexivum whitish-ochreous, 
the third and fourth antennal joints fuscous. Head with an oblique ridge on each side running back- 
wards from the inner margin of the eyes, two short parallel ridges in front, and a short median ridge, 
the latter excised in front for the reception of a short rostriform process ; antennw with the basal joint 
and the apical half of the fourth very sparsely pilose. Pronotum with irregularly confluent callosities 
on the anterior lobe, these forming five processes in front—the intero-lateral one very prominent and 
obliquely truncate, the outer one divergent and acute; the posterior lobe set with a few bristly hairs, 
with a space in the middle and the sides broadly callose, the lateral portions feebly transversely wrinkled. 
Scutellum carinate down the middle, and with the sides slightly raised. Abdomen very gradualiy 
widening to about the middle and subparallel beyond ; the fifth segment with a projecting tooth on the 
