260 RHYNCHOPHORA. 
Two males, varying in the length of the prosternal spines. The two black patches 
on the elytra are sharply defined—one, heart-shaped, crossing the suture before the 
middle, and the other at the apex. 
PRIONOBARIS, gen. nov. 
Rostrum arcuate, abruptly separated from the head above; head small; mandibles short, notched within, 
decussate ; prothorax convex, tubulate in front; scutellum free; elytra much wider than the prothorax, 
triangular; pygidium not visible; prosternum with a deep semicircular impression in the middle ; 
anterior coxe separated by about half their own width ; femora feebly clavate ; tibis serrate on their 
inner edge, strongly unguiculate at the apex, the intermediate and posterior pairs dilated at the outer 
apical angle; tarsal claws connate at the base; body rhomboid-ovate, roughly sculptured, clothed with 
a sparse setiform vestiture. 
Type, P. asper. 
This genus, based upon a single species from Mexico (the unique type of which is 
apparently a male), may be readily identified by the serrate tibiee (a character to be 
found in several Diorymeri), combined with the basally connate tarsal claws and the 
short decussate mandibles. 
1. Prionobaris asper, sp.n. (Tab. XIV. figg. 18, 18a, 3.) 
Opaque, nigro-piceous, the antennw® and tarsi obscure ferruginous; very sparsely clothed with decumbent, 
setiform, intermixed whitish and brown scales, the punctures on the under surface and legs each with 
a fine whitish hair-like scale. Head minutely punctate, deeply, transversely grooved between the eyes ; 
rostrum a little longer than the head and prothorax, arcuate, rather stout, rugosely punctate, smoother 
and shining at the tip, the antenna inserted behind the middle, the club ovate. Prothorax broader than 
long, strongly rounded at the sides, the tubulate anterior portion narrow; coarsely, rugosely punctate, 
and finely carinate. Elytra compressed at the sides below the humeri and depressed on the disc before 
and beyond the middle; deeply punctate-striate, the interstices not wider than the striz, coarsely 
uniseriate-punctate, the dorsal ones subcostate on each side and the others granulate. Beneath coarsely, 
closely punctate ; first ventral segment excavate down the middle posteriorly. Legs rugosely punctate, 
Length 41,, breadth 21 millim. (4?) 
Hab. Mexico, Juquila in Oaxaca (Sal/é). 
One specimen, rather worn. 
GERAUS. 
- Gereus, Pascoe, Ann. & Mag. Nat. Hist. (6) iv. pp. 322, 823 (1889). 
Centrinus, subgenera i-ix, Casey, Ann. N. York Acad. Sci. vi. pp. 467, 572 (1892). 
Following Casey’s system of classification, based mainly upon the form of the 
mandibles, the name Centrinus cannot be used for the numerous North-American 
species he placed in that genus. The type of Centrinus, Schénherr, as stated by 
Pascoe, is Baris bicuspis, Germ., an insect that is certainly congeneric with the type of 
Linonotus, Casey (Centrinus distinctus, Boh.*), both having the mandibles strongly 
* Recorded by Casey from “Texas,” but doubtless there has been some mistake about this locality, no 
Centrinid of the kind being known from within our limits. 
