GNAMPTOCENTRUS.—SPATHOCENTRUS. 153 
2. Gnamptocentrus cavipennis, sp.n. (Tab. IX. figg. 15, 15 a, 3.) 
Major, niger, capite sat magno, rugoso, dense punctato; pronoto antice fortius haud profunde punctato, 
metopidio sat acute carinato, cornibus sat longis, cultratis, supra carinatis, processu postico longo ultra 
apicem abdominis extenso, supra scutellum arcuato, ad medium lobato supra lobum leviter sinuato, apice 
longo acuto; scutello ad basin albido-tomentoso; tegminibus nigris, apice late medioque luteo-hyalinis, 
maculaque ante basin luted, areis ad medium concavis, venis crassis ; pedibus nigris, tarsis fuscis. 
Considerably larger than G. sinuatus, which it resembles in its general structure; pronotum rather strongly, 
subremotely, and not deeply punctured, with the horns long, sharp, and reflexed if viewed from the front, 
broad, cultrate, and carinate if viewed from above; posterior process elongate, lobed beneath at about the 
middle, arcuate above the scutellum, slightly sinuate above the median lobe; scutellum with a large 
confluent patch of tomentose pubescence at the base; tegmina black, with the apex broadly and the 
central portion irregularly luteo-hyaline, and with a luteous patch before the base, the hyaline portion 
prevailing in some specimens; the central areas are concave, and the veins thick and large; legs black, 
the tarsi fuscous. 
Long. cum tegm. 63-7 millim.; lat. int. corn, 4-44 millim. 
Hab. Guatemata, Sinanja in Vera Paz (Champion); Panama, Volcan de Chiriqui 2000 
to 4000 feet (Champion). 
This insect very closely resembles one or two of the species of Campylocentrus, but 
may at once be known by the venation of the tegmina. Apart from the difference in 
size, it is very closely related to the preceding, of which it may prove to be a variety. 
A specimen from the Volcan de Chiriqui is figured. 
SPATHOCENTRUS, gen. nov. 
Oblongus, leviter pubescens, capite magno, oculis sat magnis, prominentibus; pronoto pone metopidium brevi, 
cornu sat magno utrinque armato, his acutis, a fronte visis fere rectis, carinatis, processu postico curvato, ad 
apicem dilatato, spathato, supra scutellum elevato, usque ad medium corporis producto; tegminibus ultra 
apicem abdominis vix productis, venis crassis, areis discoidalibus duabus, fere equalibus; pedibus 
teretioribus. 
Closely allied in shape and size to Gnamptocentrus, but easily distinguished by the pronotal process being 
arcuate above the scutellum, and much dilated and spatulate at the apex, which just touches the middle 
of the body; the horns are of moderate size, and set at right angles to the side of the pronotum, being 
almost straight, or scarcely perceptibly deflexed, if viewed in front; the tegmina are opaque, and punc- 
tured at the base, with thick pubescent veins, and with two discoidal areas of nearly equal size. 
This is a very distinct genus, and is interesting as connecting the forms like Campylo- 
centrus &c. on the one hand, with those like Brachybelus, Amblycentrus, &c. on the 
other. At first sight it looks like a Gnamptocentrus with the posterior part of the 
pronotal process broken off, but when examined under a high magnifying-power this 
proves to be not the case. 
1. Spathocentrus intermedius, sp.n. (Tab. IX. figg. 16, 16 a, 3.) 
Ferrugineus, capite pronotoque fortius punctato, hoc carina centrali ab apice processus usque ad caput extensé, 
processu ipso utrinque carinato, fortiter punctato; tegminibus subhyalinis, venis crassis, rufis, pubes- 
centibus, ad basin late opacis et punctatis; pedibus ferrugineis. 
Of a ferruginous colour, with the head, which is large, and the pronotum rather strongly punctured, and the 
process of the latter carinate and punctured at the sides and on the dilated portion at the apex; scutellum 
BIOL. CENTR.-AMER., Rhynch. Homop., Vol. II., May 1896. #20 
