252 RHYNCHOPHORA. 
This genus includes a single species from Panama. It has the tibie formed as 
in Pseudoptatus (and in most of the Diorymeri), but is best placed amongst the 
Centrinides, near Ahianus. 
1. Acanthobaris castaneipennis, sp.n. (Tab. XIV. figg. 8, 8a, 3.) 
Shining, black, the elytra castaneous or fusco-castaneous; the under surface and legs somewhat thickly 
clothed with small, hair-like, cinereous scales, the median lobe of the prothorax with two dense clusters 
of similar scales, the rest of the upper surface almost bare. Head sparsely punctate, transversely 
depressed between the eyes ; rostrum about as long as the head and prothorax, a little shorter in the g, 
rugosely punctate, the flattened apical portion in the 9 smoother, the antennew inserted towards the 
base in both sexes, the joints of the funiculus becoming wider outwards. Prothorax transverse, 
subconical, constricted in front; sparsely punctate, the punctures becoming coarser and closer at the 
sides and along the basal margin. Scutellum concave. Elytra a little wider than the prothorax, 
punctato-sulcate, the interstices subseriato-punctate, becoming narrow and convex towards the apex. 
Beneath and the legs closely, rather coarsely punctate, the ventral segments 3 and 4 smoother, 
Length 3, breadth 13-14 millim. (d @.) 
Hab. Panama, Bugaba (Champion). 
One male and two females. 
DIORYMERELLUS, gen. nov. 
Rostrum strongly arcuate, moderately stout; mandibles short, decussate at the tip; antennal elub ovate; pro- 
thorax more or less tubulate in front; scutellum free, transverse or subquadrate; elytra much wider than 
the prothorax, triangular or subtriangular, with one or more of the dorsal striz obliterated; pygidium not, 
visible; prosternum unarmed, with a smooth deep excavation or sulcus, limited on each side by an oblique 
ridge and extending backward between the anterior cox; femora not or feebly suleate beneath, unarmed ; 
tarsal claws small, more or less connate at the base, free in D. histeroides; body rhomboidal, polished, 
glabrous above. 
Type, D. levipennis. 
The seven species referred to this genus, all of which are unique, have the general 
facies of the smaller Diorymeri, from which they differ in the less retractile legs, not or 
imperfectly sulcate femora, less convex form, &c. The tibie are narrow and without 
trace of angulation near the base externally. Dorymerellus includes various unnamed 
S.-American forms standing under Diorymerus in collections, and at least one species 
from the Antilles *. Centrinopsis, Reelofs, from Japan, is closely related to it. : 
* Diorymerellus obliteratus, sp. n.—Short-ovate, shining, black, almost glabrous, above and beneath ; the 
entire upper surface smooth, the under surface (the ventral segments 2-4 excepted) with coarse scattered 
punctures. Elytra compressed at the sides opposite the posterior coxx, the marginal stria alone traceable. 
Metathoracic episterna extremely narrow. Rostrum a little longer and more flattened at the tip in the 
@ than inthe ¢. First ventral segment hollowed in the middle in the ¢. Tarsal claws minute, 
connate.—Length 2-23, breadth 11-14 millim. (6 @.) 
Hab. Antitiss, St. Vincent (H. H. Smith, in Mus. Brit.). 
Six specimens. Smaller and narrower than D. levipennis ; elytra less rounded at the sides, black, and with 
the sutural stria obliterated. There is a closely allied unnamed form from Vera Cruz, Mexico, in the U.S, 
National Museum, 
