Coleopterological Notices, VI. 641 



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



maxillary palpi secui'iform or somewhat broadly triangular 5 



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

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

 and frequently greatly abbreviated; eleventh antennal joint bilobed, 

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



narrow, obliquely truncate at apex 10 



.5 — Mesosternuni more or less abnormally dilated laterally 6 



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



forming a point between the broad epiaternum and the coxae 9 



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



near basal thi rd 7 



Prothorax not constricted at the sides, except occasionally feebly and near the 



base, the sides oblique and straight 8 



T — Tlie constriction extending deeply- across the dorsal surface; antennse 



thick and subnioniliform Toinodei'llS 



The constriction not extending across the dorsal surface. 



Antennas 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 sette Baillius 



Mesosternum less extended laterally, its outer margin oblique and 

 straight; thoracic constriction strong; body very sparingly punc- 

 tate and bristling with long erect tactile setae Malpoi'US 



Mesosternum less extended laterally, its outer margin sublougitudinal, 

 scarcely at all oblique and evenly arcuate; thoracic constriction 

 feeble and more posterior; body rather sparsely punctate, feebly 

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



base iVatliictis 



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



Antennie much shorter; anterior lolje of the protliorax trapezoidal, widest 

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

 form; mesosternum as in Malporus and Lappus TliicanilS 



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



approaching the sides of the body Vacusus 



Antennse stout; mesosternuni variable in extent, becoming subgeueric in 



weight; femora clavate, the anterior strongly so Ileiiiaiitiis 



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 liase; vestiture simple Antliicus 



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

 posteriorly; elytra relatively larger and longer; vestiture duplex. 



Sapintiis 

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

 angular; body stout and convex; metasternum short Aiiiblytleriis 



