DIPLECTRUS, 125 
5. Diplectrus concolor. 
Very elongate, parallel, opaque, above and beneath and the legs and palpi yellowish-brown, densely clothed 
_ with fine yellowish pubescence. Head densely and finely punctured, the eyes black and moderately large, 
the tips of the mandibles piceous; antenne (@ ) very long and slender, extending to beyond the middle of 
the elytra, the joints very elongate, joint 2 about half the length of 3, 3 longer than 4; prothorax rather 
longer than broad, strongly rounded at the sides in front and much constricted behind, the hind angles 
prominent, the base and apex rather strongly margined, the disc a little flattened, very shallowly trans- 
versely depressed in front and also before the base, the surface very densely and finely punctured ; elytra 
very long, nearly twice as wide as the prothorax, very densely and finely punctured, with two vague 
costes on the disc and one close to the lateral margin (the inner one extending to about the middle and 
the others nearly to the apex), the suture also a little raised, the apices separately rounded ; beneath 
very densely punctured, pubescent ; legs very long; fifth ventral segment (2) shallowly emarginate. 
Length 20 millim. ( 9.) 
Hab. Panama, Volcan de Chiriqui 4000 feet (Champion). 
One specimen. Closely allied to D. giganteus and differing thus:—The head more 
densely punctured; the thorax shorter, more rounded at the sides in front, flatter on 
the disc, and less compressed at the sides; the elytra rather narrower, and with the 
apices separately rounded ; the fifth ventral segment ( ? ) shallowly emarginate in the 
middle; the legs, antenne, and palpi entirely testaceous; the upper surface of a more 
luteous tint. 
** Head and prothorax shining, the elytra opaque; femora and tibie slender 
in the male. 
6. Diplectrus nitidicollis, (Tab. VI. figg. 4,3; 4a, labium; 46, maxilla and 
maxillary palpus; 4c, cedeagus.) 
Elongate, parallel, finely pubescent, the head and prothorax shining, the elytra opaque, above and beneath and 
the legs and palpi ferruginous. Head closely and moderately finely punctured, with traces of a shallow 
transverse depression between the eyes, the latter ( $ ) black, convex, prominent, rather small, and widely 
separated, the tips of the mandibles piceous; antenne moderately long, comparatively stout, joint 2 more 
than half the length of 3, 3 and 4 equal; prothorax about as long as broad, moderately convex, the base 
and apex slightly emarginate in the middle, the former with prominent margin, the sides strongly rounded 
in front and converging behind, the hind angles prominent, the disc on each side transversely depressed 
just before the apex, irregularly and obliquely depressed about the middle, and canaliculate in the centre 
at the base (in one example canaliculate to the apex, in the other with a smooth central ridge in front), 
the surface finely and closely punctured, the anterior portion of the disc with an irregular smooth space 
in the middle; elytra long, about one and a half times as broad as the prothorax, very closely and finely 
punctured, with three rather broad vague coste on the disc and one close to the lateral margin (the first 
and third extending to about two-thirds of the elytral length and not raised, the others nearly reaching 
the apex), the suture also a little raised, the apices separately rounded; beneath pubescent, densely 
punctured ; legs moderately long, the hind tibie (¢) feebly sinuate; fifth ventral segment ( ¢) broadly 
and deeply emarginate, the sixth divided down the middle, the central sheath with an accompanying, 
separate, small spoon-shaped piece on each side. . 
Length 16-19 millim. (¢.) 
Hab. Costa Rica, Rio Sucio (Rogers). 
_.Two male examples. This species agrees very nearly with the description of 
