METRIOTES. 227 



is minute, elongate, dilated towards the apex ; the second is trans- 

 verse, obliquely truncate at its base, its breadth being equal to nearly 

 twice its length, and more than twice the breadth of the basal joint ; 

 the third is transverse, almost quadrate, cylindrical, about two-thirds 

 the breadth of the second joint, and situated apparently (not, as in 

 other genera, medially, but) towards the side of its apex ; the terminal 

 joint is short and acuminate, in breadth it is distinctly narrower than 

 the third joint. 



Labial palpi (Tab. III. fig. 8 n) somewhat smaller than the maxil- 

 lary palpi ; the second joint is elongate, and attenuate towards the 

 base ; the apical joint is almost as long as the second, more attenu- 

 ate, and acuminate. 



Antennae situated on the line of the lower margin of the eyes, 

 attenuate and filiform ; the third and fourth joints are subequal, 

 and nearly equal in length to the basal joint. 



Eyes lateral, situated at the base of the head, large, in form suffi- 

 ciently globose and suboval. 



Head distinctly produced in front, in this character approaching 

 closely to the form of the genus Rhinotmetus ; above the labrum is 

 an evident, but not abrupt or angulated, transverse depression ; the 

 anterior portion of the head is considerably depressed. 



Thorax broader than the head, transverse, rectangular; the 

 surface is equate; near the basal line is a transverse depression, 

 not broad and shallow as in most other genera, but distinct and 

 narrow, resembling somewhat the thoracic fovea in the genus Mono- 

 platus. 



Scutellum triangular, subelongate, situated in the plane of the 

 elytra. 



Elytra slightly broader than the thorax, elongate, subparallel, and 

 depressed-, the humeral and scutellary angles are very slightly 

 raised. 



Legs : the anterior femora and tibiae subattenuate, the latter being 

 straight, and hardly dilated towards the apex. The tarsi are short ; 

 the third joint is broader than the rest and slightly bilobed. The 

 posterior femora (when seen transversely) are incrassated; in form 

 ovate, attenuate towards the apex. The tibia are elongate, inflected 

 at their immediate base, straight, and slightly thickened towards the 

 apex ; when viewed from behind, the posterior surface is longitudi- 

 nally grooved ; the margination of this groove is armed (from the 

 middle to the apex) on either side with a row of five or six short and 

 sharp spurs, thus closely resembling the tibia of the genus Monopla- 

 tus ; the extreme apex of the tibiae is terminated (as in other genera) 

 below the insertion of the tarsus by two incurved claws. The tarsus 



0.2 



