226 METRIOTES. 



front : eyes situated at the base of the head, extending laterally not 

 so far as the anterior angles of the thorax ; between the eyes and 

 above the base of the antennae is an obsolete oblique fovea in the 

 shape of the letter Y : the surface is finely punctate, and at the 

 inner margin of the eyes subpubescent. Thorax quadrate (slightly 

 elongate) and rectangular ; the sides are marginate and towards the 

 base subsinuate ; near the anterior margin are two oblong tubercles, 

 distinctly and broadly prominent ; the base is transversely depressed ; 

 the surface is punctate and subpubescent. Scutellum small, trian- 

 gular. Elytra broad, deeply and coarsely punctate-striate, with 

 several irregular ridges and depressions ; a broad and deep, obliquely 

 transverse depression (from the shoulders to the middle of the suture) 

 is the most conspicuous ; below this is another, transversely oblique, 

 situated postmedially : the surface is flavo-pubescent ; two irregular 

 and suffused fuscous lines extend obliquely from the suture (slightly 

 in the direction of the apex) to the margination. Antennae robust, 

 incrassated ; the joints first to fifth flavous, sixth to eighth piceous, 

 ninth to eleventh rufo-flavous. Legs flavous, the anterior tarsi and 

 base of the tibiae being piceous, the posterior tibiae rufous, and the 

 base of the posterior femora suffused with fuscous. 



Tunantius, in the district of the River Amazon. 



Genus 36. METRIOTES*. 



PALPI MAXILLARES sat robusti ; art. 2 nd0 latiori quam penultimo, in- 



crassato ; penultimo brevi, quadrate. 

 PALPI LABIALES : art. 2 nd0 et 3 tio elongatulis, 2 nd0 robustiori. 

 ANTENNA attenuatce, filiformes. 

 CAPUT antice productum, depressum. 



THORAX transversus, rectangularis, ad basin transverse lineato-foveo- 

 latus. 



ELYTRA elongata, subparallela, depressa. 



PEDES anteriores attenuati : tibiis posticis elongatis, a retro visis lon- 

 gitudinaliter excavatis ; marginatione undique quinque aut sex 

 calcaribus armata; ung'uicula ultima bifida, simplici, Tiaud 

 dentata. 



Labrum subcircular, narrow. 



Maxillary palpi (Tab. III. fig. 8 m) sufficiently short, robust, di- 

 stinguished in form from those of other genera by having the second 

 joint more broadly incrassated than the penultimate ; the basal joint 



modestia. 



