Coleopterological Notices, VI. 641 



rounded behind; eleventh joint of the antenute simple; last joint of the 



maxillary palpi securiform or somewhat broadly triangular 5 



Penultimate tarsal joint not dilated and scarcely at all lobed, the last joint 

 subterminal in insertion ; elytra generally more or less truncate at apex 

 and frequently greatly abbreviated; eleventh antennal joint bilobed, 

 constricted generally behind the middle; last joint of the maxillary palpi 



narrow, obliquely truncate at apex 10 



5 — IMesosternum m ore or less abnoriually dilated laterally 6 



Mesosternum normally small, with the sides straight and slightly oblique, 



forming a point between the broad episternum and the coxae 9 



6- — Prothorax deeply constricted or abruptly narrowed behind the middle, or 



near basal third 7 



Prothorax not constricted at the sides, excej)t occasionally feebly and near the 



base, the sides oblique and straight 8 



1 — Tlie constriction extending deeply across the dorsal surface; antennae 



thick and submoniliform Toillodei'ilS 



The constriction not extending across the dorsal surface. 



Antennae long and slender; anterior lobe of the prothorax rounded. 

 Last joint of the maxillary palpi small or moderate, securiform. 



Mesosternum extending in a highly polished plate far toward the 

 sides of the body, its outline rounded; body extremely densely 



punctate without trace of erect setae Baiilitis 



Mesosternum less extended laterally, its outer margin oblique and 

 straight; thoracic constriction strong; body very sparingly punc- 

 tate and bristling with long erect tactile setse Malporiis 



Mesosternum less extended laterally, its outer margin sublongitudinal, 

 scarcely at all oblique and evenly arcuate; thoracic constriction 

 feeble and more posterior; body rather sparsely punctate, fee])ly 

 pubescent and devoid of long erect tactile setae; head truncate at 



base IVatliicus 



Last joint of the palpi very large and dilated, isosceles LappilS 



Antenna much shorter; anterior lobe of the prothorax trapezoidal, widest 

 near the apex; last joint of the maxillary palpi moderate in size, securi- 

 form; mesosternum as in Malporus and Lappus TllicailllS 



S — Antennae slender; mesosternum generally very greatly developed laterally, 



approaching the sides of the body Vaciisus 



Antennae stout; mesosternum variable in extent, becoming subgeneric in 



weight; femora clavate, the anterior strongly so Hemantus 



9 — Pronotum normal and evenly convex, the head subquadrate or rounded 

 behind. 

 Prothorax moderately large, oblique at the sides posteriorly, rarely feebly 



constricted just before the l)ase ; vestiture simple Aiitlticus 



Prothorax relatively small, not quite as-long as wide, sinuate at the sides 

 posteriorly; elytra relatively larger and longer; vestiture duplex. 



Sapiiitus 

 Pronotum abruptly declivous and flattened anteriorly, the head strongly tri- 

 angular; body stout and convex; metasternum short Aiublyderiis 



