152 HEMIPTERA-HOMOPTERA. 
Very closely allied to Campylocentrus, but with the tegmina quite differently veined, there being five apical 
areas (two on the external margin, the one nearest the apex being very small, the next two large, and 
the external one smaller, and rounded at the apex, where it is joined in the centre by the marginal vein), 
and two discoidal areas, of which the interior is almost circular and the exterior very small. In one of 
the species below described the posterior process of the pronotum is very strongly sinuate on both its 
surfaces, in the other the sinuation is only slight, so that it does not form a good character. 
It will be noticed that the number of apical and discoidal areas of the tegmina are 
the same as in Campylocentrus, but their shape and distribution are very different, and 
the tegmina, though more or less pellucid, appear to be more coriaceous, with the 
veins thicker and coarser. 
1. Gnamptocentrus sinuatus, sp. n. 
Minor, niger vel piceus, antice griseo-pubescens, capite dense punctato, pronoti humeris a fronte visis distincte 
prominulis, distincte sed hand profunde punctato, cornibus sat latis leviter recurvis, supra carinatis, 
processu postico ultra apicem abdominis extenso, fortiter sinuato, ad medium lobato, serpentino ; scutello 
ad basin albido tomentoso; tegminibus hyalinis nigro-variegatis, ad basin nigris, deinde macula albida vel 
luted, interdum indistincta vel fere deficiente, instructis; pedibus nigris, tarsis dilutioribus. 
Mas minor, apice tegminum cum ceteris concolori. 
Femina major, apice tegminum luteo-hyalino. 
A small species, black or pitchy in colour, with the pronotum distinctly, subremotely, and not deeply punctured, 
with rather strong, but not long horns, which are slightly recurved, pointed at the apex, and carinate on 
their upper surface, and with a long process, which reaches beyond the apex of the abdomen, and is 
strongly sinuate on both its upper and lower margins, and is lobed in the middle, the lobe being often 
more or less merged in the sinuation; tegmina hyaline, variegated with black, black at the base, with a 
luteous or whitish spot a little before the base, which is often indistinct; legs black or pitchy, with the 
tarsi, and sometimes the apex of the tibie, lighter. 
. Smaller and darker, with the pellucid part of the tegmina clear hyaline. 
. Larger and more pitchy, the tegmina less clearly hyaline, with the apex especially obscurely luteous. 
. Long. cum tegm. 44-6 millim.; lat. int. corn. 33-4 millim. 
. Long. cum tegm. 43-5 millim.; lat. int. corn. 23-3 millim. 
Hab. Mexico, Atoyac in Vera Cruz (Schumann), Teapa in Tabasco (H. H. Smith); 
GuatEMALA, Cubilguitz and San Juan in Vera Paz, El Tumbador, Las Mercedes, Cerro 
Zunil, Zapote (Champion); Panama, Volcan de Chiriqui (Champion). 
40 Oy 10 Qy- 
So far as I have been able to judge, the differences above noticed are.sexual, but the 
examples from Teapa (seven in number), and one from Atoyac, have the pronotal 
process more strongly sinuate, and, where the tomentose pubescence is not rubbed off, 
have only two minute spots, one on each side of the base of the scutellum. The 
specimens from the other localities have the pronotal process less strongly sinuate, 
and the pubescence, where present, forming a confluent patch at the base of the 
scutellum, which is, however, sometimes very thin in the middle. In one small 
specimen from Las Mercedes the pubescence is very thick and white, and in this 
example the pronotal process is very slightly sinuate in the middle. It is possible 
that I may have included two species under the above description. 
