328 HETEROMERA. 
B. Antenne longer and more slender, the ninth and tenth joints longer than broad. 
12. Talanus longicornis. 
Moderately elongate, convex, varying in colour from piceous to ferruginous, shining. Head coarsely and rather 
closely punctured, the transverse frontal impression usually deep; antenne slender, widening very little 
outwardly, comparatively long, passing considerably beyond the base of the prothorax, joints 7-10 subtri- 
angular in form and longer than broad, the apical joint ovate and about half as long again as the tenth, 
ferruginous; prothorax coarsely, irregularly, and somewhat closely punctured, the sides but little 
narrowed behind (in some examples nearly straight), the hind angles more or less acute ; elytra convex, 
subparallel in their basal half, widest in the middle, deeply striate, the strie with elongate, moderately 
coarse, rather closely placed impressions, the impressions coarser towards the sides and finer and shallower 
towards the apex, the interstices feebly convex (or almost flat) on the disc, more strongly so towards the 
sides and apex, and almost smooth; the anterior and intermediate tibia each with a sharp triangular 
tooth some distance before the apex, and the posterior tibie serrate in their outer half, on the inner side, 
in the male; beneath almost smooth, the ventral surface very finely, shallowly, longitudinally wrinkled, 
the sides of the metasternum and the side pieces with coarse impressions, the flanks of the prothorax 
very coarsely but rather sparingly punctured. 
Length 5-73 millim. (d 2.) 
Hab. Britis Honpuras, R. Hondo (Blancaneaux); Guatemaua, San Juan in Vera 
Paz (Champion); Nicaragua, Chontales (Belt); Panama, Bugaba, Volcan de Chiriqui 
(Champion). — 
This insect, like several of the allied species, varies considerably in size; it will be 
recognized amongst its winged allies by the slender ferruginous antenne (in this 
respect resembling 7. apterus, though with these organs rather shorter), the penulti- 
mate joints of which are subtriangular and much longer than broad. The elytra are 
sculptured much as in 7’, swbevaratus, but with the striz less coarsely punctured. 
2. Species apterous ; antenne long and slender, the penultimate joints longer than 
broad ; elytra punctate-striate. 
13. Talanus apterus. (Tab. XIV. figg. 4,3; 4a, labium; 46, maxilla and 
maxillary palpus.) 
Elongate ovate, very convex, bronze-black, shining, Head sparingly but coarsely punctured, the epistoma 
much smoother, very deeply transversely impressed in front; antennz long, extending far beyond the base 
of the prothorax, slender, gradually widening outwardly, joints 6-10 subtriangular, 8-10 equal in width 
but decreasing a little in length outwardly, the apical joint ovate and about half as long again as the 
tenth, light ferruginous (the outer joints in one example a little infuscate); prothorax strongly rounded 
at the sides anteriorly, narrowed and sinuate behind, the hind angles rectangular, the surface very coarsely, 
irregularly, and somewhat sparingly punctured, a shallow oblique impression on each side (occasionally 
connected by a shallow transverse impression on the disc) some distance behind the middle; elytra com- 
paratively short, ovate, almost gibbous, broadly truncate at the base, more bronzy in tint than the 
prothorax, narrowly but deeply striate from the base to the apex, the stria finely crenate-punctate on the 
disc and rather more coarsely so at the sides, the interstices feebly convex on the disc and strongly so at 
the sides and apex, smooth; legs smooth, brownish-piceous, the coxe, the base of the femora, the outer 
half of the tibiz, and the tarsi ferruginous ; anterior and intermediate tibiee each with a sharp triangular 
tooth, and the posterior tibie: with three or four very small teeth, on the inner side some distance before 
the apex, in the male; beneath almost smooth, the ventral surface very minutely punctured along the 
