MONOPLATUS. -> 



than, and similar in form to, the third ; the rest somewhat shorter, 

 subequal, oblong, the last (the terminal joint) being more elongate 

 and subacute. 



Eyes round, globular, prominent, not extending in either sex, 

 laterally, so far as the anterior angles of the thorax ; in the males 

 situated at some little distance in front of, in the females immediately 

 in front of, the base of the head. 



Head (Front, fig. 1 a) slightly produced (not so distinctly as in 

 Ehinotmetus) and subattenuate in front ; in the males narrower and 

 rather more elongate than in the females (in which it is broad and 

 transverse). 



Thorax broader than the head, transverse, rectangular ; the ante- 

 rior angles depressed, the sides rectilinear and marginate ; at the 

 base (apparent in every species) is a narrow transverse regular groove 

 (running exactly parallel to the line of the margin), which terminates 

 abruptly (before it reaches the posterior angles) by being deflected 

 at right angles towards the basal line ; the surface generally almost 

 impunctate and glabrous. 



Scutellum triangular, impunctate. 



Elytra broader than the thorax, parallel, subcylindrical ; in the 

 females broader and much more robust than in the males ; more or 

 less transversely depressed from the antemedial suture towards the 

 shoulders (by which an appearance of prominence is given to the part 

 near the scutellum), punctate-striate or punctate, more or less di- 

 stinctly ; impubescent and brightly coloured. 



Legs, in the males, longer and more robust than in the females. 

 The anterior femora robust, subdilated medially, impubescent. The 

 tibia} straight, at the immediate apex incurved downwards, slightly 

 thickened towards the base, truncate at their termination. The tarsi 

 (Front, fig. 2 d) short ; the basal joint broad and produced, broader 

 than the apex of the tibiae, ovate at the base and abruptly truncate 

 at the apex ; the second is minute, triangular and subelongate, in 

 length not more than one-third of the basal joint, and in greatest 

 breadth not one-half the breadth of the basal joint ; the third joint 

 is distinctly and broadly bilobed, in length not equal to the second 

 joint, but transversely broader; the terminal joint is elongate, 

 slender, slightly incurved, and gradually increasing in thickness 

 towards its apex. The terminal claw (Front, fig. 2 e) is bifid and 

 minute ; the three basal joints are completely and densely fringed 

 with thick pubescence. The posterior femora (Tab. I. fig. 1/) 

 are incrassated, extending in the males nearly to the apex of the 

 abdomen ; at the apex (at the insertion of the tibiae) they are ob- 

 liquely truncate. The tibice (Tab. I. fig. 3 y) are robust, straight, 



b2 



