46 



6. Length over 5 lines. 



Head and thorax not punctured ; elytra with golden pubescence 



- - ruficornis. 



(Scybalicus oblongiusculus, a species recently introduced as British, resem- 

 bles H. ruficornis in appearance, but has the posterior angles of the thorax 

 rounded, whereas ruficornis'has these angles right angles?) 



Group II. — Upper side not punctured (except the base of the thorax and 

 the outer interstices of the elytra occasionally). 



a. Thorax broader in front than behind, 



1. Outer interstices of elytra punctured; elytra deeply sinuate before the 



the apex ; colour bronze, green, blue, or black - - proteus. 



2. Outer interstices not punctured ; elytra not deeply sinuate behind. 



Antennae and legs black or pitchy ; colour like proteus - ignavus. 

 Antennae and legs red; colour more or less pitchy - - consentaneus. 

 All the above measure from 3£ to 5 lines in length. 



b. Thorax about as broad in front as behind. 



Legs pitchy black ; length \ inch : cupreus. 



Legs partly or wholly red. 



1. Legs entirely red. 



Upper side greenish ; margins of thorax and elytra red ; length \ inch 



- - discoideus. 

 Upper side greenish or black ; margins of thorax only often red - 



rubrlpes. 



Upper side black ; third interstice of elytra without distinct impres- 

 sions ; side margin of the thorax red - latus. 



Upper side bluish black ; third interstice of elytra with two or three 

 deep impressions ; thorax without a red margin - quadripunctatus, 



2. Legs more or less pitchy. 



Length 3^ lines ; thorax with a deep longitudinal depression at the 

 base ; sides of thorax rounded - neglectus. 



Length 4 to 5 lines ; thorax with the sides not rounded and without 

 a deep depression at base - tenebrosus. 



c. Thorax narrower in front than behind. 



1. Antennae and palpi entirely red. 



Flat; length under 4 lines; thorax with the base slightly emarginate 



- - servus. 



Convex; .length lines; base of thorax straight - - tardus. 



2. Antennae and palpi more or less pitchy. 



Length under 3 J lines - • - » anxius. 



