AMPHISCEPA —HYSTEROPTERUM. 119 
2. Amphiscepa subpellucida, sp. n. (Tab. XII. figg. 9, 9a.) 
Subpellucida, griseo-testacea, antice fusco-brunnea; vertice brevi, lato, fronte longitudine latiori, indistincte 
tricarinata ; clypeo magno, convexo, haud carinato; pronoto sat longo, antice rotundato ; scutello magno, 
obscure albido lineato ; tegminibus subvitreis, reticulatis, venis radiali et ulnaribus crassis, furcatis, 
testaceis nigro persparsim aspersis ; pedibus testaceis. 
Femina segmento ultimo ventrali leviter emarginato, processu ad medium instructo. 
Of a griseo-testaceous colour, with the front-parts brownish; vertex very short and broad; forehead broad, 
indistinctly tricarinate; clypeus large, convex, without a carina; pronotum rather long, comparatively, 
rounded in front; scutellum large, with obscure whitish lines ; tegmina subvitreous, reticulate, with the 
principal veins strong, and much forked, testaceous, sparingly marked with black, claval suture very 
strongly marked ; legs testaceous. 
Female with the last ventral segment of the abdomen gently emarginate, with a process in the centre. 
Long. cum tegm. 53 millim.; lat. 24 millim.; lat. tegm. 4 millim. 
Hab. GUATEMALA, near the city (Champion). 
There is also a single specimen of a very small and obscure species of this genus in 
our collection, from Tierra Colorada in Guerrero, Mexico, which I prefer not to 
describe without further material ; it appears, however, to be quite distinct. 
HYSTEROPTERUM. 
Hysteropterum, Amyot et Serville, Hist. Nat. Ins. Hémipt. p. 519 (1843) ; Stal, Hemipt. Afr. ii. 
p. 204. 
The members of this genus are distinguished by having the wings quite rudimentary 
and the posterior tibie bispinose. According to Stél the radial and exterior ulnar 
veins are forked near the base, and he forms another genus, Falcidius, on certain 
species which have the costa not dilated and the exterior ulnar vein forked further 
from the base. I have not seen a typical specimen of the latter genus, and it is very 
doubtful if it is distinct from Hysteropterum. Of the three species described below, 
one has the costal margin simply rounded, and the other two have it angularly dilated 
towards the base; in each of them the radial vein is forked not far from the base and 
the exterior ulnar vein at or about the middle, while the interior ulnar vein is simple 
until a little before the apex, where it is lost in the confused reticulation. The vertex 
is very short, except in H. montanum, which may belong to another genus; it would 
be possible, however, to multiply the genera of the Isside almost indefinitely on such 
characters. 
1. Hysteropterum sierra, sp.n. (Tab. XII. figg. 10, 10a.) 
Parvum, brunneum, tegminibus griseo-testaceis, subpellucidis, fusco irregulariter notatis; vertice brevissimo, 
oculis distincte latiori, fronte sat lata, latitudine longiori, lateribus subparallelis, medio carinato; clypeo 
convexo, producto; pronoto brevi; scutello sat magno; tegminibus amplis, subovalibus, margine costali 
rotundato, reticulatis, confusius venatis ; pedibus brunneis, spinis duabus tibiarum posticarum validis. 
Femina processu anali magno, lato, apice truncato. 
*16 2 
