PSEUDOBARIS. 449 
Eleven males and two females. A remarkably distinct form, superficially resembling 
P. acutipennis and P. plicata, of a brilliant metallic-zeneous colour, with a conical 
prothorax, a shallow prosternal sulcus, unarmed elytra, with the striz coarsely punc- 
tured anteriorly and the interstices sinuously costate at the tip, and the pygidium 
of the female almost covered by the elytra, the rostrum in this sex being abruptly 
flattened, so as to appear gibbous at the base, much as in P. abrupta and P. puncti- 
collis. The San José specimens were found on Polygonum punctatum by the late 
P. Biolley. 
49. Pseudobaris dividua, sp.n. (Tab. XXI. figg. 32, 324, 4, 2.) 
Oblong-ovate, rather dull, black, with a brassy lustre, glabrous above, the punctures on the under surface and 
legs each bearing a minute seale. Head minutely punctate, alutaceous ; rostrum (¢ ) arcuate, stout, 
about as long as the head and prothorax, finely strigoso-punctate, ( Q ) smoother, longer, and more 
slender, the antenne inserted at (d) or behind (@) the middle. Prothorax transverse, arcuately 
narrowing from the base, feebly constricted in front; coarsely, closely punctate. Elytra depressed along 
the suture, deeply punctate-striate, the snterstices subcostate on the apical declivity, each with a row of 
fine, shallow, transverse impressions, Beneath closely punctate. Prosternum (fig. 32 b) deeply sulcate, 
the sulcus not or feebly margined at the sides anteriorly and becoming divided into two between the 
cox by a smooth, lanciform, anterior prolongation of the basal process, the latter feebly emarginate 
behind. Femora unarmed. 
Length 23-33, breadth 1-14 millim. (d 2.) 
Hab. Mexico, Motzorongo (Flohr), Atoyac, Teapa (H. H. Smith); Guatemana, Trece 
Aguas in Alta Vera Paz (Schwarz & Barber, in U.S. Nat. Mus.), Tamahu, Senahu, 
Duefias (Champion); NICARAGUA (Sallé), Chontales (Janson) ; Costa Rica, Patarra 
(Biolley). 
Found in plenty at Trece Aguas and Tamahu. Extremely like P. diversa, but with 
the elytra simply rounded at the apex, and the prosternal sulcus less strongly bifurcate 
behind (the dentiform piece extending forward from the basal process in consequence 
narrower) and not sharply margined at the sides anteriorly. P. puncticollis (Boh.) 
has a somewhat similar, bifurcate prosternal excavation, but in that insect the basal 
process is also sulcate, and j-shaped or lanciform between the coxe, the elytra are 
more broadly striate, the rostrum is gibbous at the base, &c. Heterosternus carbo, 
Kirsch, from Colombia, also has a similar sternal structure, but it is a smoother and 
more elongate insect than P. dividua. 
50. Pseudobaris abrupta, sp. n. (Lab. XXI. figg. 33, 33.4, 4, ¢ .) 
Oblong-ovate, moderately shining, black, with a brassy lustre ; glabrous above, the punctures of the under 
surface and legs each bearing a minute scale. Head sparsely, minutely punctate ; rostrum ( ¢ ) about 
as long as the head and prothorax, abruptly bent inwards from near the base and rather slender thence 
to the tip, and closely, finely punctate, (2 ) more slender, flattened, and much smoother, the antenne 
inserted at about the basal third in both sexes. Prothorax slightly broader than long, rather convex, 
gradually narrowing from the base, and feebly constricted in front; closely impressed with very coarse, 
rounded punctures. Elytra rounded-triangular, very little wider than the prothorax, depressed along 
the suture; deeply striate, the striee becoming coarsely punctate anteriorly, the interstices flat, rather 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 5, February 1909. 3 MM 
