54 TETRAGONOTES. 



broader and longer than the basal joint, dilated slightly anteniedially, 

 truncate at the apex ; the third longer than the second, ovate ; the 

 apical joint elongate, narrower at its base than the apex of the third, 

 conical. 



Labial palpi (Tab. II. fig. 3 n) ovate, elongate ; the second joint of 

 greater length than breadth, broader than the first; the apical joint 

 short and conical. 



Antennae filiform, sufficiently robust ; contiguous, situated imme- 

 diately below and between the eyes ; in the males rather more elon- 

 gate than the females ; the first joint broad, dilated and deflected 

 outwards towards the apex ; the second short, ovate ; the third sub- 

 attenuated at the apex, gradually incrassated, longer than the first, 

 in the <5 more evidently longer than in the $ ; the fourth joint in 

 the females is manifestly short ; the fifth to the eleventh are of the 

 same form and size, subcylindrical, slightly attenuated towards the 

 apex ; the apical joint is more attenuated and tapering. 



Eijes tolerably large, very globose, prominent, situated at the base 

 of the head, and extending laterally almost beyond the anterior tho- 

 racic angles. 



Head short, transverse, broadly produced in front (but not produced 

 so far as in Bhhiotmetus), depressed at an obtuse angle to the plane 

 of the elytra ; generally deeply longitudinally carinated. 



Thorax broader than the head, elongate, rectangular, anteriorly 

 not emarginate ; the anterior angles are much depressed and acute 

 (not, as in BJiinotmetus, rounded and obsolete) ; the sides are broadly 

 marginate, and produced antemedially into a lateral tooth-like pro- 

 jection (of the same form as that in Octogonotes) ; the anterior portion 

 of the disc is generally more or less raised, and at the base trans- 

 versely depressed. 



Scutellum triangular, generally impubescent. 



Elytra broader than the thorax, subparallel, slightly attenuated 

 at the apex, at the sides finely marginate ; generally punctate-striate. 



Legs : the anterior femora robust, medially slightly dilated when 

 viewed transversely. The tibial are subincurved, and slightly dilated 

 towards the apex ; the hollowed socket, admitting the base of the 

 tarsus, is simple (not armed with a claw, or comb-like teeth, as in 

 Rhinotmetus). The tarsus (Tab. II. fig. 4 d) is short, the basal joint 

 broader than the tibia (in the males), and triangular ; the second 

 triangular, but more minute ; the third broad, and distinctly bilobed ; 

 these three are thickly clothed on the inner surface, and fringed at their 

 margins with close and strong pubescence ; the apical joint is atte- 

 nuated, elongate, and slightly incurved, admitting at its subdilated 

 apex the terminal claw, which is bifid, and armed at the inner base 



