A7ichomeim.<t.'\ ADEriiAOA. 87 



thorax strongly raised towards 

 base ; posterior angles obtuse 



bat plain A. GRAClLirES, Dufl. 



B. Colour black or black with a very 

 slight metallic lustre. 



a. Concave bowler of thorax narrow . A. ateatus, Duft. 



b. Concave border of thorax broad, 

 a*. First ami second joints of (los- 



terior tarsi dull with a strong keel 

 on their upper side ; strise strong, 



interstices convex A. VlDVrs, Ptinz., v. luoesf us, Duft. 



h*. Fii'st and second joints of pos- 

 terior tarsi shining, simply convex ; 



stiiffi weaker, interstices flat . . A. TEU3UTUS, Gj/IL 

 11. Antennae with first two joints and lower part 

 only of the third joint glabrous ; upjier 

 part of third joint and the remaining joints 



strongly pubescint. 

 i. Thorax cordiform ; head and thorax green ; 

 elytra yellow with green, or greenish blue 



markings A. DORSALIS, Miill. 



ii. Thorax not cordiform ; head and thorax 

 black or pitciiy. 



1. Thorax not longer than broad. 



A. Concave margin of thorax strong, 

 especially at base ; elytra with slight 

 greenish metallic reilection. 



a. Thorax slightly broader in front 



than behind A. micanp, J\7c. 



b. Thorax considerably broader in front 



than behind. A. sciXULUS, l>y. 



13. Concave margin of elytra rather 

 narrow ; elytra without metallic re- 

 flection. 



a. Basal margin of elytra slightly 

 sinuate ; shoulders slightly jiro- 

 jeeting; posterior angles of thorax 



rounded but traceable A. FCLIGINOSUS, Fanz. 



b. Basal margin of elytra strongly 

 sinuate; shoulders distinctly pro- 

 jecting. 



u*. Elytra and legs black ; posterior 



anglcsof thorax completely rounded A. GUACIL13, Gt/IL 



b*. Klytra autl legs lighter or darker 

 pitchy brown ; posterior angles of 

 thorax rouuded but traceable . . A. riCEUS, L. 



2. Thorax plainly longer than broad. 



A. Elytra lighter or darker reddish 

 brown, sides nearly parallel ; striie 



weaker A. TiiOREYi, D^/. 



B. Elvtra pitch-black, sides slightly 



rounded; stria; stronger A. ruKLLUS, D&j. 



Group T. (Siib-(!t'n. Platynus, I'.oiiclli.) 

 A. ang-usticollis, F. {a.-^.-^iini/if!, JXyk., juiirtus, Srop.). Black, 

 pliiuiiiLj ; antenna' antl palpi ])itchy ; tliunix narrow, corcliforni, rutnitk'd 

 iu IruiiL, and rather stroni^dy narnnvud behind, with [icsteriur angles 



