TANTMECUS. 



segment angulate externally ; 

 2 with a very deep round 

 lateral impression at each side 

 of third segment pertusiventris, Fst., p. 81. 



22 (21) Apical margin of second ventrnl 



segment truncate latenilly ; 5 

 without ventral impressions. 



23 (28) Rostrum with n distinct central 



carina. 



24 (25) Colour metallic green ; J with a 



long pencil of orange hairs at 



apex of elytra henu/es, Desbr,, p. 82. 



25 (24) Colour dull brown or grey brown; 



(5 without pencil of hairs. 

 2(3 (27) Elytra strongly narrowed from 

 shoulders to apex ; scutellum 

 not paler than elytra ; hind 

 tibiae of (5 not denticulate in- 

 ternally obscurifs, sp. n., p. 83. 



27 (26) Elytra gradually narrowed be- 



hind, more obtuse posteriorly ; 

 scutellum paler than elytra ; 

 hind tibiaj of J' denticulate in- 

 ternally si7>iple:r, sp. n., p. 83. 



28 (23) Rostrum witliout a distinct 



carina. 



29 (32) Legs black ; anal segment of 2 



compressed to a point at apex. 



30 (31) Tibia3 not denticulate internally ; 



prothorax as long as broad ; 

 punctiu-es on elytra large and 

 deep vmithurus, Cliev., p. 84. 



31 (30) Tibi« denticulate; prothorax a 



little longer than broad ; punc- 



tation on elytra finer mi.rtus, Est., p. 84. 



32 (29) Legs reddish, the front tibiaj not 



or scarcely denticulate ; anal 



segment of J rounded at apex, vuirf/inalis, Gyl., p. 85. 



33 (20) Left mandible witli its edge trun- 



cate or rounded, and with a 

 dorsal transverse impressed line, 



34 (35) Prothorax narrower at base than 



at apex ; elytra rounded behind ; 

 antennal club compact and 

 ovate arenaceus, sp. n., p. 86. 



35 (34) Prothorax not narrower at base 



than at apex ; elytra acuminate 

 behind ; antennal club rather 

 loose and narrowly elongate. 

 30 (39) Scape reaching the posterior mar- 

 gin of eye ; prothorax much 

 narrower at apex than at base ; 

 shoulders sloping. 



37 (38) Striae 1-3 not broader or deeper 



at apex than on disk ; apices of 



elytra not divergent in J ■ • • • kntus, Est., p. ^<i. 



38 (37) Stri"^De 1-3 much broader and 



71 



