430 Memoirs on the Coleoptera 



allied genera, which would rank well with the Eurhinini and Son- 

 netiini, these also being intermediate tribal groups. However, 

 these matters can very well be left to the future for further taxo- 

 nomic consideration, when general knowledge of the subfamily 

 Barinae shall have become more complete. 



The genera now known to me are the following: 



Mandibles straight, non-decussate, prominent when closed, the inner edges 

 rectilinear and virtually even, not at all dentate. Body elongate, parallel 

 and convex; beak rather thick, strongly sculptured; antennae medial, with 

 small club; prosternum shallowly canalate, with narrow prominent emargi- 

 nate posterior lobe; tarsi slender, with large third joint and connate claws; 

 body glabrous; pygidium very large. [Type Baris pyritosa Germ.] 



Castenus 



Mandibles prominent when closed, not or but feebly decussate and moderately 

 dentate within; claws free 2 



Mandibles bifid and decussate, more rounded externally and never conjointly 

 prominent when closed 5 



2 — Pygidium very short and transverse; elytra with some close vestiture, which 

 is more or less fasciiform in arrangement 3 



Pygidium rounded; body with much smoother and more glabrous integument.. 4 



3 — Pronotum with coarse, dense longitudinal rugae; scutellum very small, 

 rounded and rather free, the elytra without prominent subapical umbones; 

 pygidium entirely concealed from above by the tips of the elytra; beak 

 rather short and thick, arcuate; prosternum with two subapical foveae. 

 [Type Onychobaris rugicollis || Lee. (lecontei Chmp.)] Glyptobaris 



Pronotum with fine and dense, longitudinal rugae; scutellum small, closely fitted 

 and triangular; elytra without prominent umbones; pygidium nearly as 

 in Glyptobaris; beak and antennae moderate; prosternum moderately canal- 

 ate, the coxae well separated; body much smaller and more slender than in 

 Glyptobaris, the elytral scales forming a chevron. [Type A. obliquata nov.] 



Amphibaris 



Pronotum with fine and oblique, close rugulosity; scutellum larger, rather closely 

 fitted, transverse, angulate behind; elytra with prominent subapical um- 

 bones; pygidium subsimilar but somewhat larger; prosternum having a 

 sharply defined even canal, extending to the intercoxal suture; beak longer, 

 arcuate; body more broadly oval. [Type 0. submetallicus nov.]. . . .Opertes 



4 — Body oblong-oval, smooth and polished, the sculpture feeble; scutellum 

 small, rounded and rather free, the thoracic lobe prominent and narrowly 

 rounded; eltyra with remotely scattered white squamules and a dense spot 

 at the base of the third interval; beak moderate, arcuate; prosternum with 

 a deep parallel canal. [Type G. binaria nov.] Mexico Genevra 



5 — Pygidium rounded as in Baris and Pseudobaris, sometimes larger and more 

 sexually modified 6 



Pygidium extremely short and transverse, as in the pygidiate Madopterids; 

 claws free 34 



6 — Tarsal claws connate or closely contiguous at base, sometimes distinctly 

 diverging in Heterosternus 7 



Tarsal claws free 20 



7 — Femora strongly dentate beneath. Tibiae dentate externally; body broad, 

 cuneiform, densely sculptured and with very large separated scales; beak 

 long and slender; antenna? long, slender, subbasal, with long first funicular 

 joint and small club; prosternum flat, narrowly separating the coxae; scu- 



