Coleopterological Notices, IV. 467 



15 — Antennal club large, oval, very densely pubescent and nearly as long 

 as the six preceding joints combined, a form suggestive of Rlioptobaris ; 

 pygidium convex, indexed beneath, sinuating the fifth segment when 

 viewed vertically Hespei'Obaris 



Antennal club much smaller. 



Beak slender, longer than the prothorax, separated from the head by a very 

 feeble impression ; integuments subglabrous ; species minute. 



JMlcrobaris 

 Beak robust, shorter, separated from the head by a deep angular impres- 

 sion ; integuments more or less densely squamulose ; species large. 



Tricliobaris 



16 — Prosternum not distinctly tumid before the coxse, very broadly and 

 scarcely visibly impressed ; beak a little more robust, separated from the 

 head by a very broad feeble and indefinite impression ; scutellum flat, 

 triangular, sculptured like the surrounding surface ; prothorax larger ; 

 body more elongate Rlioptoljaris 



Prosternum strongly tumid before each coxa ; beak slender, separated from 

 the head by a distinctly marked transverse impression; scutellum sub- 

 quadrate, slightly transverse; prothorax small, subconical....OrtllOl'is 



11 — Mandibles normal in action, their plane of motion horizontal or nearly 

 so ; body without erect setse except in Zaglyptus 18 



Mandibles with their plane of motion almost vertical, the upper part of the 

 condyles nearly in mutual contact within a small emargination of the 

 epistomal lobe, the lower condylic fissures very near the buccal opening ; 

 surface of the body bristling with sparse erect spines or spiniform setfe ; 

 tarsi narrow, the third joint irot sensibly dilated ; antennae insei'ted on 

 the under surface of the beak 31 



18 — Tarsi with two free and more or less divergent claws 19 



Tarsi with the claws connate or single 28 



19 — Mandibles prominent, not decussate when closed or at most very feebly 

 so 20 



Mandibles not at all prominent, thick, arcuate, strongly decussate when closed 

 and deeply notched at apex 23 



5JO — Mandibles with the inner edge always completely devoid of denticles or 

 emarginations, generally straight but sometimes feebly arcuate and de- 

 hiscent toward apex, in which cases the mandibles cannot be placed in 

 mutual contact throughout their length CeiltrinilS 



Mandibles with the inner edge straight, but more or less finely denticulate or 

 crenulate. 



Antennae inserted far behind the middle of the beak 21 



Antennae inserted at or beyond the middle of the beak ; body oval or nar- 

 rower and subparallel 22 



21 — Anterior coxae narrowly separated ; species small and densely squamose. 



Ceiitrinopiis 



Anterior coxae widely separated. 



Beak separated from the head by a very deep transverse constriction ; scu- 

 tellum large, quadrate or trapezoidal ; integuments with dense abruptly 

 defined squamose vittae ; body broadly rhomboidal L.illonotuS 



