450 PHYTOPHAGA. 



convex near the apices ; underside and legs black, glabrous ; the upper margins of the posterior tibiae 

 armed with a row of small teeth ; claws appendiculate. 



Hab. Panama, Volcan de Chiriqui {Champion). 



2. Metriotes flavicollis. 



Pale flavous or flavous, glabrous; antennas nearly as long as the body; head and thorax impunctate; elytra 

 metallic violaceous blue, strongly punctate-striate, depressed below the base. 



Length 2-2± lines. 



Head impunctate, the vertex with a short longitudinal central fovea ; the frontal tubercles strongly developed, 

 elongate, not limited behind by a transverse groove ; the lower part of the face concave, testaceous ; 

 antennas more than two thirds the length of the body, fulvous, the fifth joint slightly longer than the 

 two preceding ones ; thorax of exactly the same shape as in M. nigricollis, the surface impunctate, trans- 

 versely depressed along the base, fulvous or flavous ; scutellum flavous ; elytra much more strongly and 

 more closely punctured than in M. nigricollis, especially within the basal depression, the extreme apices 

 nearly impunctate ; underside and legs flavous ; the posterior tibiae armed at their upper margin with a 

 row of small teeth. 



Hab. Panama, Bugaba (Champion). 



3. Metriotes apicicornis. (Tab. XXVI. fig. 6.) 



Black or piceous below ; the four last joints of the antennae fulvous, the vertex black, the lower part of the 

 face and the thorax flavous ; elytra metallic green or blue, moderately strongly punctured. 



Length 3 lines. 



Head with a small fovea at the vertex, the latter entirely or partly piceous or black ; the frontal tubercles 

 elongate, strongly raised ; the space at the inner sides of the eyes with a few punctures ; the palpi black ; 

 antennae rather more than half the length of the body, the third and fourth joints equal, the first seven 

 joints black, the rest fulvous ; thorax of the same shape as in M. flavicollis, the anterior angles each fur- 

 nished with a single long hair, the surface flavous, impunctate, depressed near the base ; scutellum flavous ; 

 elytra with a distinct depression below the base, the punctuation very distinct but not very strongly 

 impressed, the interstices flat; posterior tibiae armed with a row of teeth, their apices with a 

 double spur. 



Hab. Panama, Volcan de Chiriqui (Champion). 



Separated from M. flavicollis by its larger size, and by the colour of the head and 

 antennae. 



SPARNUS. 



Sparnus, Clark, Cat. of Halticidse, p. 265 (1860). 



The single species (S. globosus), from the Amazons, on which Sparnus was established 

 differs from any of the preceding or following genera by the general roundly ovate shape 

 of its body, in connection with the glabrous upper surface and the dilated antennae. 

 According to Clark, the genus Cyrton, although of similar shape, is distinguished from 

 Sparnus by the simple, not appendiculate claws. 



I refer to this genus three species from Central America ; these are all furnished with 

 appendiculate claws. The range of the genus is from Nicaragua to the Amazons 

 valley. 



