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 painted; 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 

 presternum 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, uniafiated, the segments not much impressed at base; 

 lngs rather long and very slender; hind tarsi with the basal joint as 

 long as the next two. Southeastern States of America Biocrypta 



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 11 



10 — Body subparallel, moderately slender and convex, strongly and simply 

 punctate, 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- 

 hiud 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; basil 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 para'lel and arcuate, wider than 

 the head; elytra wider than the prothorax, with the suture beaded; 



