120 HEMIPTERA-HOMOPTERA. 
A small species, with the body brown, and the tegmina of a greyish-testaceous colour with irregular dark 
markings; vertex very short and broad; forehead rather broad, with the sides subparallel, carinate ; 
clypeus large, projecting, and flattened at the sides ; pronotum short; scutellum rather large, three times 
longer than the pronotum; tegmina subovate, somewhat pointed at the apex, with the margins evenly 
rounded, and the venation and reticulation somewhat confused, the radial vein forked near its base, and 
the anterior ulnar vein before the middle, the interior ulnar vein simple until near the apex; legs brown, 
posterior tibize with two strong spines. 
In the female the anal process is large and broad, and truncate at the apex, and the anal style is short and 
thick. . 
Long. 4 millim. ; lat. ad hum. 2 millim. 
Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (A. H. Smith). 
2. Hysteropterum angulare, sp.n. (Tab. XII. figg. 11, 11a.) 
Preecedenti quoad staturam, formam coloremque valde affine, sed margine costali tegminum fortiter angulariter 
dilatato, venisque distinctioribus tegminum, et clypeo multo minus producto, facile distinguendum. 
Femina processu anali angustiori. 
Similar to the preceding in size and colour, and also in general structure, but easily distinguished by the shape 
of the costal margin of the pronotum, which is obscurely and angularly dilated just before the middle ; 
the clypeus is less produced, if viewed from the sides, and the veins of the tegmina are more distinct and 
regular ; the exterior ulnar vein is forked just about the middle; the surface of the tegmina is roughly 
sprinkled with minute dark dots; and the female has the anal process narrower. 
Long. 33-4 millim. ; lat. ad hum. 2 millim. 
Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith). 
8. Hysteropterum montanum, sp.n. (Tab. XII. figg. 12, 12a.) 
Majus, fuscum, tegminibus subolivaceis, antice testaceis, vitté irregulari brunnea ad humeros, pone medium 
obscurioribus, notis minutis fuscis adspersis; vertice ante oculos distincte producto, transverso, margine 
antico supra viso late angulariter emarginato; fronte latitudine longiori, carina distincté media in- 
clypeum planum continuatd instructa; pronoto capiti fere equilongo; scutello distincte tricarinato ; 
tegminibus amplis ad humeros scutello multo latioribus, subtiliter alutaceis, venis distinctis, vena ulnari 
exteriori ad medium furcaté; pedibus longis, testaceis, spinis duabus tibiarum posticarum validis. 
Mas laminis genitalibus brevibus, tuba genitali longa, nitida, antice reflexd, subtus utrinque processu pertenui 
acuto instructaé ; processu anali modico, supra variegato. 
A comparatively large species ; front-parts fuscous, tegmina subolivaceous, greenish-testaceous in front, with 
a large irregular brown band at the shoulders, rather darker behind, the whole surface being speckled 
with minute dark dots ; vertex distinctly produced before the eyes, transverse, with the anterior margin 
emarginate in a broad angle; forehead longer than broad, with a distinct central keel, which is continued 
on the clypeus, the latter being flat and not projecting ; pronotum about as long as the head; scutellum 
distinctly tricarinate ; tegmina ample, about two and a half times as broad as the scutellum at the 
shoulders, where the margin is much dilated and angled, veins distinct, reticulate at the apex ; legs long, 
testaceous, posterior tibiae with two strong spines. 
Male with the genital plates short, and the genital tube long, shining, reflexed, and bluntly pointed in front, 
with two long and very slender almost hair-like processes depending backward from the opening 
beneath ; anal process moderate, variegated above, anal style very short. 
Long. cum tegm. 6 millim.; lat. ad hum. 4 millim. 
Hab. Mexico, Ciudad in Durango 8100 feet (forrer). 
