ocYrrs. 257 



J5 B, Legs red-yellow. 



Black, dullish ; base and last three joints of antennae 

 red-yellow. Thorax almost lialf as long again as elytra, 

 with a smooth central line. L. 5 — 7 1. Rather common. 



0. hrunnipes, Fab. 



II. Head and thorax more or less bronze. 



1, Thorax rather difliisely, finely punctured ; an- 

 tennae black. 



Winged. Head and thorax black-bronze, shiny ; elytra 

 and abdomen black, dull ; legs black, tarsi pitch-brown. 

 Penultimate joints of antennae rather broader than long ; 

 thorax about as long as elytra. L. 5 — 6 1. Not common. 



0. fuscatus, Gr. 



2, Thorax very closely, finely punctured, with a 

 smooth, raised central line ; antennae red-brown, 

 often blackish at base. 



Winged, somewhat shiny. Head and tliorax bronze ; 

 elytra brownish ; abdomen black ; legs black-brown, tarsi 

 (and sometimes til)iae) red-brown. Upper-side covered 

 with rather long yellow-gray hairs, forming five longitudinal 

 lines on abdomen. L. 4^ — 7 1. Common. 



0. cupreus, Rossi, 



6. Last joint of labial palpi hatchet-shaped. 



I. Head and thorax closely, coarsely punctured, often 

 with smooth central line ; antennae red-brown, 

 often pitchy in middle. 



Black ; legs red-brown. Elytra not much longer than 

 thorax, somewhat bluish. L. 9 — 10 1. Not common. 



0. 2Jedator, Gr. 



II, Head and thorax diffusely and strongly punc- 

 tured, with smooth central line; antennae black, 

 often red-brown at apex. 



Black ; tarsi pitch-brown. Elytra rather longer than 

 thorax. L. 6 — 8 1. Rather common. 0. ater, Gr. 



B. Mandibles without any tooth in middle. 



a. Antennae black, usually rust-brown at apex ; legs 

 black, with tarsi (and often tibiae) rust-brown. 



Black, dull. Head generally broader than thorax, punc- 

 tured more diffusely in front than l^ehind ; thorax rather 



