156 HEMIPTERA-HOMOPTERA. 
OPHICENTRUS, gen. nov. 
Oblongus, latior, capite zeque longo ac lato, ocellis ad basin sitis inter se quam ab oculis paullo magis remotis ; 
pronoto sat convexo, sine cornibus, humeris prominulis, linea centrali elevaté, processuque longo, fortiter 
sinuato, serpentino, usque ad apicem abdominis extenso; tegminibus fere totis fuscis ad partem sub- 
coriaceis, venis crassis; corio areis apicalibus quinque, externa minima, discoidalibus duabus, externa fere 
circulari et marginem costalem modo non attingenti; clavo venis duabus distinctis ; pedibus teretibus. 
Oblong, comparatively broad; head with the ocelli situated not far from the base; pronotum convex, without 
horns or carine, except the central line, with the shoulders prominent, and with a long, strongly sinuate, 
serpentine process, which is strongly elevated above the scutellum, and is not lobed beneath at the centre, 
where it touches the tegmina ; tegmina partly subcoriaceous, with very thick veins; corium with five apical 
areas, the external being very small and almost merged in the venation, and two discoidals, the external 
being almost circular and almost touching the costal margin; clavus with two distinct veins on the disc, 
one being near suture; lcgs slender. 
This is a very distinct genus, and unlike any other known to me; it may at once be 
known by the peculiar process of the pronotum and the venation of the tegmina. 
1. Ophicentrus notandus, sp.n. (Tab. IX. figg. 20, 20a.) 
Q. Nigro-fusca, capite inequali, dense punctato, sparsim pubescenti ; metopidio supra caput plicato, ferrugineo ; 
pronoto haud nitido, dense et distincte punctato, lined centrali elevaté duabusque ad latera antice conver- 
gentibus, humerisque prominulis, ferrugineis, processu postico ferrugineo, apice nigro, supra et ad latera 
utrinque carinato, sat fortiter punctato; scutello fere eque lato ac longo, apice ferrugineo ; tegminibus 
fusco-hyalinis apice late, macula magna ante basin, alteraéque minori ad marginem interiorem apicem 
versus, hyalinis, basi ferrugineé punctata; pedibus ferrugineis, partim fuscis. 
Fuscous-black, with the metopidium above the head, the central line of the pronotum, two broad bands on either 
side converging to the metopidium, and the shoulders, which are prominent, ferruginous ; pronotum dull, 
thickly and distinctly punctured, with the posterior process ferrnginous and black at the apex, rather 
strongly and rugosely punctured and carinate on each side, as well as on its upper surface; tegmina in 
great part fuscous, with a large spot before the base, and another on the interior margin, as well as the 
apex, hyaline, the base ferruginous, slightly variegated with black ; legs ferruginous, in part fuscous. 
Long. cum tegm. 4 millim.; lat. int. hum. 2 millim. 
Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 
PSILOCENTRUS, gen. nov. 
Elongatus, angustus, capite longitudine haud multolatiore, ocellis basin versus positis ; pronotv convexo, humeris 
prominulis, linea centrali elevat4, carinaque elevata brevi utrinque ante basin, processu postico elongato, 
leviter sinuato, subtus inermi, supra scutellum elevato; scutello longo; tegminibus elongatis, fere totis 
hyalinis, areis apicalibus quinque, discoidalibus duabus ; alis areis apicalibus quatuor ; pedibus sat longis. 
Elongate; head with the ocelli placed not far from the base, and a little further from one another than from the 
eyes; pronotum convex, with the shoulders prominent, and with two short but rather strongly elevated 
carine on each side of the central line near the base, which are bluntly pointed in the centre, and are most 
conspicuous if viewed from the front; posterior process long, nearly reaching the apex of the abdomen, 
gently sinuate, not lobed beneath, raised above the scutellum, which is longer than broad; tegmina 
elongate, with the extreme base opaque and punctured, and the rest hyaline; corium with five apical and 
two discoidal areas ; clavus with one distinct vein ; wings with four apical areas; legs slender. 
This genus is allied to Ischnocentrus, but may readily be known by the.elongate and 
gently sinuate posterior process and the lateral carine of the pronotum. 
