26 ? Trans. Acad. Sci. of St. Louis. 
laterally prominent; neck about half as wide as the head; basal joint of 
the antennae longer than in Hesperobium but relatively shorter than in 
Pycnocrypta; labrum short, strongly, biobliquely truncate, with a broad 
shallow rounded median sinus; mandibles slender, finely aciculate 
apically, evenly and equally arcuate, tridentate within, the outer tooth 
longer and more aciculate than the other two which are equal; mem- 
branous lobes of the ligula rather pointed; mentum large, trapezoidal, 
coriaceous in apical third, the dividing line transverse and rectilinear; 
palpi as in Hesperobium, the gular sutures rather less approximate but 
similar in form; prothorax moderate, somewhat narrowed apically, the 
prosternum long, well developed and unimpressed before the coxae; 
elytra longer and wider than the prothorax, very feebly impressed along 
the suture which is scarcely at all beaded; abdomen rather narrower 
than the elytra, unioflated, the segments not much impressed at base; 
legs rather long and very slender; hind tarsi with the basal joint as 
long as the next two. Southeastern States of America........Biocerypta 
9 — Neck more than half as wide as the head; eyes submedian in position. 10 
Neck much narrower, distinctly less than half as wide as the head; eyes an- 
terior in POSItION... ese veccscccccccee ee re poecee seteveeveusseuaw Le 
10 — Body subparallel, moderately slender and convex, strongly and simply 
puuctate, the integuments shining, feebly micro-reticulate, the elytra 
not minutely sculptured; head moderately developed, the eyes at or 
slightly behind the middle, the sides parallel behind them to the broadly 
rounded basal angles; base broadly arcuate-truncate; post-ocular foveo- 
lae apparently wanting; neck fully three-fifths as wide as the head; frontal 
parts before the eyes conspicuously narrower; labrum transversely, 
rectilinearly truncate, with a small rounded emargination between the 
teeth; basal joint of the antennae moderate, as long as three-fourths 
the width of the head, the last joint short truncate and spongiose at 
tip; lobes of the ligula small, rounded; mentum biobliquely tumid, 
the apex strongly rounded and coriaceous; gular sutures becoming 
extremely approximate posteriorly to the base; prothorax about as wide 
as the head, the sides converging from the rounded apical angles to the 
base; elytra about as long as the prothorax and wider; abdomen parallel, 
about as wide as the elytra, the segments feebly impressed at base; 
legs short but slender, the hind tarsi short, with the basal joint as long 
as the next two but subequal to the fifth. Panama......*Cryptobiella 
Body fusiform, slender, rather convex; integuments polished and wholly 
sculptureless, strongly but not densely, simply punctate; abdomen 
minutely reticulate and punctulate; head narrow and elongate, moder- 
ately narrowed before the eyes, the latter obliquely truncate poste- 
riorly, situated at or just before the middle of the length, the sides be- 
hind them converging to the very narrowly rounded basal angles; neck 
three-fifths as wide as the head; post-ocular foveolae apparently want- 
ing; labrum, pa!pi and mentum as in Cryptobiella; gular sutures rather 
well separated, straight and parallel, diverging anteriorly and near the 
base; basal joint of the antennae as long as the next three combined, 
and though only moderately elongate, nearly as long as the width of the 
head; prothorax oblong, with the sides parallel and arcuate, wider than 
the head; elytra wider than the prothorax, with the suture beaded; 
