168 HEMIPTERA-HOMOPTERA. 
fusco, apicibus segmentorum flavescentibus ; pedibus posticis, parte exteriore excepta, nigris, ceteris fusco- 
testaceis, 
Rather broad, gradually narrowed behind, with the head finely granulose, testaceous, with minute black spots 
and two lighter testaceous small patches at the base; pronotum and scutellum obscurely testaceous, 
irrorated with black, the pronotum with obscure warm brown markings at the sides, metopidium with 
two testaceous patches in front; semicircular depression before the apex of the scutelum (which is black) 
very distinct; tegmina vitreous, smoky at the apex and on the extreme margins, with the punctures 
dark ; posterior legs mostly black, anterior pairs fusco-testaceous ; abdomen black, with the apex of the 
segments testaceous. 
Long. cum tegm. 6 millim.; lat. int. tegm. 3 millim. 
Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith). 
One male specimen. The male organs, to judge by their external appearance, may 
present good characters, but would require dissection. In examining the specimen, 
the pronotum became detached, leaving asmooth space exposed underneath, at the base 
of which are markings, which under a compound microscope appear in some lights as if 
they might be a stridulating-organ. 
ENDOTASTUS, gen. nov. 
Oblongus, parvus, subparallelus, capite magno, producto, ad basin depressione lata in duo lobos divisd, antennis 
sub oculis positis, ocellis fere ad marginen centralem oculorum sitis, his approximatis ; pronoto irregulariter 
hexagonali, postice latissimo, humeris vix prominulis, distincte carinato, antice supra caput late plicato, 
sine cornibus vel processu postico, a latere viso convexo rotundato, antice abrupte postice levius declivi ; 
scutello fere eque longo ac lato, postice depresso carinato; tegminibus intectis, totis opacis, punctatis, 
corio venis indistinctis, areis apicalibus quatuor, discoidali nullé; alis areis apicalibus quatuor; pedibus 
modicis. 
- Oblong, narrowed in front and parallel behind, with the head large and produced, and bilobed at the base, 
above which the metopidium is strongly plicate; ocelli placed close to the eyes at about their central 
margin; pronotum irregularly hexagonal, with the angles more or less rounded, strongly convex if viewed 
from the side, with a very distinct central keel, but without horns or posterior process; shoulders very 
bluntly prominent if viewed from the front, rounded if viewed from above, the base almost straight before 
the scutellum. which is about as long as broad, pointed at the apex and plainly carinate ; tegmina opaque 
and punctured, corium with four apical areas and no discoidal; wings with four apical areas; tarsi rather 
short. 
The formation of the basal portion of the head and the position of the ocelli appear 
to place this peculiar little Membracid near Zropidaspis and one or two allied genera; 
it is quite possible, however, that future writers may assign it a different position. 
1. Endoiastus caviceps, sp.n. (Tab. X. figg. 16, 16 a.) 
Subparallelus, haud nitidus, fusco-ferrugineus, dense subtiliterque punctatus, breviter sparsim aureo-pubescens ; 
oculis vix prominulis; pronoto antice posticeque fusco ; scutello fusco, carina postice testacea ; tegminibus 
opacis fusco-testaceoque obscure variegatis ; corpore subtus pedibusque fuscis vel fusco-ferrugineis. 
A small oblong and subparallel species, dull, very closely and finely sculptured and scantily clothed with very 
short golden pubescence, which appears to be easily rubbed off; pronotum ferruginous, with a patch at the 
base and the anterior part dark or entirely fuscous, with two obscure ferruginous vitte converging 
towards the front ; scutellum fuscous, with the apex of the carina testaceous ; tegmina opaque, unicolorous 
