OCTOGONOTES.— METEIOTES. 449 



2. Octogonotes Mvomarginatus. (Tab. XXVI. figg. 4, 11, 12.) 



d . Below fulvous ; head rugose-punctate, the vertex black ; antennae scarcely thickened ; thorax angulate at 

 the sides, piceous, margined with fulvous ; elytra clothed with yellow pubescence, piceous, the margins 

 narrowly fulvous. 



$ . Antennse incrassate at the terminal joints ; thorax more transverse than in the male. 



Yar. a. Elytra fulvous, a spot at the base and another near the apices piceous. 



Var. 6. Entirely fulvous, the sixth to the tenth joints of the antennse black. ( ? •) 



Length 2 lines. 



Head strongly rugose-punctate at the vertex, the latter with a triangular black spot ; antennae rather robust, 

 half the length of the body, fulvous, stained with fuscous, the third and fourth joints of equal length, 

 rather long, the apical joints much shorter ; thorax twice as broad as long, the sides strongly angulate at 

 the middle, the surface with three obsolete tubercles, depressed near the base and at the sides, rugosely 

 punctured, piceous, the lateral margin rather broadly fulvous, the disc thinly clothed with short yellow 

 pubescence ; scutellum fulvous ; elytra distinctly depressed below the base, clothed with long yellow 

 pubescence, rather strongly punctate-striate, the disc with a longitudinal broad piceous or black band 

 from the base to the apices, the margins narrowly fulvous ; posterior tibiae with a double spur ; claws 

 somewhat appendiculate, the inner division rather long. 



Hab. Panama, Volcan de Chiriqui (Champion). 



0. fulvomarginatus is well distinguished by its coloration and the sculpture of the 

 thorax; in the variety a the elytral black bands are interrupted medially, so as to form 

 a basal and apical spot. The specimen I refer to the female differs, apart from the 

 coloration, in the incrassate terminal joints of the antennae and the much more trans- 

 versely-shaped thorax ; it agrees in all other respects with the male insect. 



METEIOTES. 



Metriotes, Clark, Cat. of Halticidse, p. 226 (1860). 



Like Monoplatus, Metriotes is distinguished from all other genera of this section of 

 the Halticinse by the dentate exterior margin of the posterior tibiae ; it differs, however, 

 from Monoplatus in the incrassate (not filiform) palpi and the want of the thoracic 

 groove. 



The genus was established upon a single species (M. robinsoni) from Rio Janeiro ; 

 we now add three others from Central America. 



l. Metriotes nigricoUis. (Tab. XXVI. fig. 5.) 



Black, glabrous ; head and thorax impunctate ; elytra metallic blue or violaceous, depressed below the base, 

 distinctly punctate-striate. 



Length 3 lines. 



Head entirely impunctate ; the frontal tubercles narrowly elongate, bounded behind by a fovea, not by a 

 transverse groove; labrum obscure dark fulvous ; the penultimate joint of the palpi incrassate ; antennse 

 slender, half the length of the body, black, the fifth joint slightly longer than the two preceding ones, 

 which are equal ; thorax twice as broad as long, black, very shining, all the margins perfectly straight, 

 the angles not produced and scarcely thickened, the surface with an obsolete transverse shallow depres- 

 sion near the base and entirely impunctate ; scutellum black ; elytra with a distinct depression below the 

 base, the latter slightly swollen, the surface regularly and distinctly punctate-striate, the interstices rather 



biol. CENTE.-AMEE., Coleopt., Vol. VI. Pt. 1, June 1886. 3 m 



