330 HETEROMERA — TENEBRIONIDAE. 



slightly beMnd middle, punctuation nearly uniform. L. 

 2| 1. Kather common. A. piceus, 01. 



Tenebrlo. 



A. Upper-side dull; third joint of antennae nearly as 

 long as fourth and fifth together, apical joint transverse 

 oval. 



Black ; abdomen sometimes brown. Thorax with a 

 narrow transverse elevation (often indistinct), bounded by 

 a furrow at each end, before middle of base ; interstices on 

 elytra very slightly convex, each with a row of small 

 granules ; femora very slightly thickened in middle, an- 

 terior pair with a rudimentary tooth beneath. L. 6 J — 8 1. 

 Eather common. T. oh s cur us, Fab. 



^. Upper-side shiny ; third joint of antennae distinctly 

 shorter than fourth and fifth together, apical joint rather 

 longer than broad. 



Upper-side black or black-brown, under-side rather 

 lighter. Thorax with few or no traces of transverse 

 elevation before base ; interstices on elytra somewhat con- 

 vex ; femora distinctly thickened in middle. L. 7 1. 

 Common. T. mo lit or, Lin. 



JBTelops. 



A. Under-side black ; raised side margin of elytra almost 

 interrupted near apex. 



Upper-side dark blue or bluish-violet. Thorax a little 

 broader than long, truncate or nearly so at base, punctured 

 in wrinkles, sides with a thick raised border ; under-side of 

 femora not fringed. L. 6 — 8 1. Moderately common. 



H. coeruleus, Lin. 



-B. Under-side reddish-yellow or red-brown ; raised side 

 margin of elytra uniform. 



a. Femora strongly fringed beneath; sides of thorax 

 sinuate before base. 



Reddish-yellow ; eyes black. Thorax much broader than 

 long, truncate at base, rather finely punctured, sides with a 

 narrow slightly raised border. L. 2| — 3| 1. Not un- 

 common. H. pallidus, Curt. 



