COLEOPTERA. 
473 
. ]\resostcriunn not produced. 
* Eyes not divided by a lamina ; bead keeled above the eyes. 
a. Head beneath transversely impressed, or silicate. 
n. Elytra nearly always margined at base. 
** Epistome somewhat retracted; labriim distinct. 
aa. Eyes transverse. 
aa. Body black ; habit of Anatob'ea, but antenna) more 
slender, cl} pens rotundate. 
Scythis (Schaiim), g. n. 
bb. Body pitchy black, antenna) and legs paler. 
Calohamony g. n. 
hh. Eyes siibrotundate. 
aa. Coleoptera nearly smooth, widened, generally much 
wider than thorax ; legs elongate. 
Micipsa (Luc.). 
bb. Coleoptera with large punctures; habit of Mi- 
crodcra Alcinoe (M^nf^t.). 
ft Epistome not retracted ; labrum concealed. 
aa. Antennae with joint 3 twice or three times as long 
as 2 Te^ityria (JLtA,.). 
bb. Antenme with joint 3 scarcely twice as long as 2 ; 
body less convex. 
aa. Sides of thorax slightly rounded. 
— Elytra much longer than head and thorax. 
KJiytinota (Esch.). 
= Elytra somewhat longer than head and thorax; 
posterior femora long. 
MclaracJmica, g. n. 
bb. Sides of thorax subparallel. 
Sphenariopsis, g. n. 
cc. Thorax cordate ; eyes covered by a plate ; body 
rather flat Stcyastopsis, g. n. 
cc. Antennse with joint 3 equal to or shorter than 2. 
aa. Elytra piinctato-lineate. 
— Thorax broader than long ; antenna) rather stout. 
Mesostena (Esch.). 
= Thorax longer than broad ; antennae slender. 
Mesostenoph, g. n.' 
bb. Elytra costate Asidialtcsthesj g. n. 
cc. Elytra nearly smooth. . HiojitJiis 
b. Elytra not margined at base, the shoulders alone keeled. 
** Mesosternum deflexed. 
aa. Femora unarmed. 
aa. Anterior tibiae scarcely dilated towards the apex. 
Microdera (Esch.). 
bb. Anterior tibiae dilated . Packychile (Esch.). 
bb. Femora dentate Platomodcs (Mimet.). 
tt Mesosternum plane, median process sulcate, emarginato, 
or bifid ; eyes constricted. . Oxycara (Sol.). 
/I. Head beneath obliquely sulcatc on each side. 
