270 The late Mi-. F. Bates's Revision 



basal lobe narrow : scutellum wider than long, smooth : elytra with 

 irregular, faintly-impressed, striae, which are irregularly — and more 

 or less vaguely — punctate ; there are also two rows of minute, but 

 distinct, black points near the suture, two others (abbreviated behind) 

 on the disc, with others — irregularly placed — between the rows ; the 

 two dorsal intervals a little dusky : pygidium more or less convex 

 and declivous, delicately aciculate-rugulose, the sides and base green, 

 the apex testaceous (not well-defined) : under-side shining greenish- 

 castaneous ; sides of metasternum and of abdomen rather thinly 

 pilose ; middle of abdomen metallic, almost smooth, the last segment 

 very finely rugulose-punctulate, the sides and hind border testaceous : 

 legs and antennae testaceous. 



9 . Form more robust and convex, less shining : clypeus longer, 

 with the front subtruncate (angles rounded) and more reflexed, and 

 the sides sinuate : thorax, head behind, and scutellum, with distinct 

 green reflections : elytra more expanded behind : pygidium less 

 abruptly declivous, entirely dark green, more coarsely sculptured : 

 under-side greener, the 5th abdominal segment well punctured in 

 the middle, the last unicolorous, closely and entirely aciculate- 

 rugulose : legs darker, and more tinged with green. 



Long. $. 23-25-25.5 mm.; $. 25.5 mm. Lat. ^. 13mm.; $. 

 14 mm. 



Hab. Guiana and Venezuela (Manoa). 

 There are individual differences in colour and brightness 

 of head, thorax, and under-side. 



Received from various sources with this name. 



Mecopelidnota, n. gen. 



^ . Clypeus semicircular, all the margins well and evenly reflexed, 

 front margin entire : mandibles deeply notched externally : eyes 

 large : base of thorax distinctly margined, narrower than base of 

 elytra, the median lobe broad : scutellum wider than long, sides 

 curvilineate : elytra rather abruptly declivous behind, the apical 

 callus large and prominent : pygidium rapidly declivous, convex at 

 apex : hind legs not elongated, their tibiae abruptly widened inter- 

 nally behind the base, setose on inner face : intermediate tibife 

 similarly formed but the emargination smaller: hind tibial s^iurs 

 long and very acute, especially the inner one : hind tarsi rather 

 slender, the claw joint not incrassated nor toothed beneath, the outer 

 claw widened and sinuated along the lower edge, the extremity very 

 acute ; front outer claw long and moderately stout, its extremity 

 entire and acute : prosternal process small and narrow ; meso- 



