MICROLEDRIDA.—PACHYNTHEISA. 99 
MICROLEDRIDA, gen, nov. 
Brevis, sat latus, capite magno, obtuse triangulariter ante oculos producto, vertice carina media distincta 
instructo; fronte lata, convex, ad medium et ad latera subtiliter carinata, clypeo fronte multo angustiore, 
lateribus carinatis ; pronoto sat longo, carina media distincta ; scutello pronoto sesqui vel duplo longiore, 
plus minusve distincte tricarinato; tegminibus subcoriaceis, venis utrinque granulis setosis instructis, 
, vena posteriori clayi apicem clavi haud attingente, vend transversé clavi venam posteriorem pone medium 
attingente; vend radiali ad basim multo ante venam ulnarem interiorem furcaté; costa magna, granulosa ; 
areis apicalibus circiter undecim regularibus ; tibiis posticis basim versus bispinosis. 
Short and rather broad, with a large, produced, bluntly triangular head; vertex with a distinct carina; eyes 
longer than broad, not or scarcely emarginate; ocelli situated at the exterior angle in front; forehead 
broad, rounded, convex, and with very fine keels in the centre and at the sides, the former being some- 
times scarcely visible; clypeus narrower than forehead, keeled at the sides; pronotum proportionately 
long, with distinct central keel; scutellum one and a half times, or twice, as long as the pronotum, feebly 
but plainly tricarinate; tegmina subcoriaceous, with the broad costal space and the veins on each side 
set with strong setose granulations, the transverse vein of the clavus joining the posterior vein behind 
the middle, the venation somewhat indistinct, but the radial vein appears to be forked not far from the 
base, considerably before the interior ulnar vein, the apical areas distinct and regular, eleven or twelve 
in number; wings with two transverse veins; posterior tibiae with two teeth—one just at the base and 
the other a little before this, the former being more or less plainly bifid. 
1. Microledrida asperata, sp.n. (Tab. XI. figg. 1, 14,0, 9; 2, ¢, terminal 
segments of the abdomen from beneath.) 
Vertice testaceo, rufo transversim notato, fronte dilute testacea, clypeo fuscato; pronoto scutelloque testaccis, 
hoc interdum fusco-notato; tegminibus subpellucidis, antice fusco plus minusve notatis, et vittaé fusca 
pone medium instructis; abdomine nigrescenti ad partem testaceo; pedibus testaceis. 
Mas segmento ultimo ventrali late emarginato, ad medium in latum triangularem processu producto, stylis 
magnis ad basim late divergentibus, apicem versus approximatis, apicibus submalleiformibus. 
Front parts testaceous, the vertex with more or less obscure reddish lines, the clypeus and part of the rostrum 
fuscous, the latter elongate; scutellum sometimes more or less fuscous; tegmina semitransparent, the 
apical half more or less fuscous, and also with a fuscous band behind the middle, the coarse granulations 
set with black sete; abdomen more or less pitchy; metasternum testaceous, with granulations at the 
sides; legs testaceous. 
Male with the last ventral segment produced in a blunt and broad triangle; styles long, much divergent 
behind, approximate in front, with large hammer-shaped tips. 
Female with the last ventral segment simple, and the ovipositor strongly developed. 
Long. cum tegm. 34 millim.; lat. ad hum. 13 millim. 
Hab. Mexico, Chilpancingo in Guerrero (#. ZH. Smith). 
PACHYNTHEISA, gen. nov. 
Brevis, latus, vertice brevi, sat lato, carinato; oculis infra emarginatis ; fronte lata, ad medium vix, ad latera 
o) ’ b] ’ b) to} ’ 
fortius carinatdé, clypeo ad busim lato carina media distinct4, lateribus carinatis: rostro longo, tenui: 
b) ? ’ oN? ’ 
pronoto scutelloque distincte tricarinatis, hoc convexo illo duplo longiore; tegminibus amplis, brevibus, 
pone humeros latissimis, clavi vend interiori clavi apicem haud attingente, vend transversa ad hanc in 
medio clavi adjuncta, vend radiali ante venam ulnarem interiorem furcata, venis magnis granulatis ; tibiis 
posticis spinis duabus distinctis pone et ante medium et tertia minori ad basim indistinctis. 
Short and broad, with a short and broad vertex, not or scarcely produced before the eyes, which are large and 
emarginate beneath ; forehead broad, with a scarcely perceptible central keel, which becomes stronger at 
the apex; clypeus and frons both keeled at the sides, the former with a very strong central keel ; rostrum 
long and slender; pronotum comparatively long, with three distinct keels, the side ones more or less 
