HYPHANCYLUS. 117 
“HYPHANCYLUS, gen. nov. 
Vertice brevi, fortiter transverso, ante oculos vix producto, fronte subquadrata, plus minusve obscure carinata, 
clypeo convexo; scutello pronoto plus minusve longiori; tegminibus plus minusve falcatis, callositate ad 
humeros distincte elevata, venis plus minusve confusis, costa venis transversis instructa; alis angustis, 
venis distinctis ab apice usque ad basim extensis, plerumque subparallelis; pedibus robustis, tibiis 
posticis bispinosis. 
Vertex very short, strongly transverse ; forehead subquadrate, more or less obscurely carinate ; clypeus convex, 
separated from the forehead bya deep furrow; pronotum produced and rounded in front, and not angled ; 
scutellum variable in form ; tegmina more or less falcate, convex, with a large elevated callosity at the 
shoulders, which causes the insect to appear contracted towards the base, if viewed from above, the veins 
more or less confused, but the radial appears to be forked near the base and the exterior ulnar vein at 
the middle ; wings narrow, with distinct and more or less parallel veins ; legs stout, posterior tibize with 
two spines. 
The two species referred to this genus are both of small size. 
1. Hyphancylus falcatus, sp.n. (Tab. XII. figg. 6,64, 3.) 
Brunneus, clypeo marginibusque frontis brunneo-testaceis; tegminibus fuscis, brunneo variegatis, fortiter 
falcatis, apicibus productis, a latere viso elevatis, reticulatis ; clavo basim versus fortiter asperato, sutura 
clavali profunde impress4; corpore supra testaceo, subtus plus minusve obscuro; pedibus testaceis. 
Mas laminis genitalibus prelongis, reflexis, ad medium dente parvo, ad apicem dente magno acuto instructis ; 
processu anali prelongo deflexo, fortiter supra canaliculato. 
Fuscous-brown, with the clypeus lighter; tegmina variegated with black and brown, strongly falcate, with 
the apex produced and reticulate, clavus strongly asperate towards the base, and the same asperation is 
sometimes present on or near the humeral callus, claval suture very strongly impressed ; wings smoky, 
with distinct dark veins ; legs testaceous, with the two spines rather blunt. 
Male with the last abdominal segment minutely impressed at the apex, the genital plates very long, narrow, 
and reflexed, and terminating in a large, sharp, hook-shaped tooth, and there is also a minute tooth in 
the centre of their upper surface ; anal process long, slender, deflexed, strongly channelled above. 
Long. cum tegm. 5 millim.; lat. ad hum. 3 millim. 
Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (7. H. Smith). 
2. Hyphancylus excelsus, sp.n. (Tab. XII. figg. 7, 7a, 3.) 
Minor, brunneus vel fusco-brunneus, colore obscuriore vel dilutiore variegatus, vel unicolor; pronoto sat 
longo, inter oculos rotundato-producto ; scutello leviter tricarinato, carina centrali indistincté ; tegminibus 
margine exteriore valde rotundato, inferiore fere recto, minus quam in specie precedente falcatis, venis 
plus minusve confusis ; alis famatis, venis nigris ; corpore fusco, ad partem testaceo; pedibus testaceis, 
spinis duabus tibiarum posticarum sat longis et acutis. 
Mas laminis genitalibus sat brevibus et latis et ad medium dente magno obtuso armatis ; processu anali sat 
lato, apice acuto. 
Femina segmento ultimo ventrali furtiter emarginato, emarginatione sinuatié et ad medium denticulate 
producté; processu anali lato ad apicem obtuso. 
Smaller than the preceding species, with the tegmina less falcate, the outer margin being very strongly 
rounded, and the inner margin almost straight; pronotum produced and rounded in front, comparatively 
long; scutellum not much longer than pronotum ; tegmina unicolorous castaneous-brown, or variegated, 
with the venation more or less confused ; clavus not or scarcely asperate at the base; wings smoky, with 
strongly-marked dark veins ; legs testaceous, with the two spines of the posterior tibie sharp. 
Male with the genital plates comparatively short and broad, and armed at about the middle with a large blunt 
tooth, which rises to meet the rather broad anal process ; the latter is acute at the apex. 
BIOL. CENTR.-AMER., Rhynch. Homop., November 1904. *16 
