360 Trans. Acad. Sci. of St. Louis. 



The characters of the table have been drawn from a species 

 of Araeocnemis of moderate size, which may be described as 

 follows : — 



Rather stout, with slender, elongate pro thorax, brilliant blue -green in 

 color with purplish reflection on the elytra and pronotum, which are 

 polished and with rather coarse, sparse, impressed and evenly but irreg- 

 ularly distributed punctures, each of which bears a conspicuous stiff 

 black hair; head oblong-elongate, relatively rather small though wider 

 than the prothorax, parallel, with rounded basal angles, the upper sur- 

 face throughout with coarse and very dense, longitudinally anasto- 

 mozing punctures, the sides subinferiorly behind the eyes with a broad 

 parallel-sided longitudinal line, which is acutely limited above and 

 below, broadly, feebly concave and in great part impunctate, the punc- 

 tures of the under surface coarse and conspicuous posteriorly but 

 almost wanting anteriorly; antennae with the first three joints sub- 

 glabrous, the next two coarsely punctate and setulose, the last six, and 

 especially the last four, very minutely, densely pubescent, the penulti- 

 mate slightly transverse and a little longer than the preceding joint; 

 mandibles arcuate and convex externally, becoming narrowly grooved 

 toward base only; they are broadly decussate in repose and much 

 shorter than the head ; prothorax narrow, anteriorly pointed from 

 near the middle and impressed at each side toward base; elytra large, 

 quadrate, nearly twice as wide as the prothorax, with the inner edge 

 only very narrowly beveled, the line marking the summit of the bevel 

 being, on each elytron, strongly elevated and cariniform. Length 18.0 

 mm.; width 4.5 mm. Panama * laata n. sp. 



This species cannot be identified with any of those described 

 in the Biologia under the name Sierculia, and Agrodes Nord., 

 and Plochionocerus Shp., are very different in facies though 

 apparently belonging to the same subtribe. 



Metoponci. — The genus Metoponcus, of Kraatz, is one of 

 the most isolated of the tribe and is undoubtedly of full sub- 

 tribal importance ; I know of no associates for it at present. 

 The genus appears to be peculiar to the more southern of the 

 palaearctic faunal provinces, whence I have examples from 

 Greece and Lenkoran, The body in Metoponcus is moderately 

 slender, parallel and convex, nearly as in the genus Gyrohyp- 

 nus of the Xantholini, but the head is remarkably elon- 

 gate, parallel and rectilinear at the sides, the flanks behind 

 the eyes not having two obtuse lines with a flattened area be- 

 tween them, as is generally the casein that tribe, but, on the 

 under surface parallel and close to the sides, there is a re- 



