296 BKACHELYTKA — STENIDAE. 



The variety littoralis, Th., is smaller, with legs pitchy, 

 and punctuation rather closer and stronger. 



2, First joint of posterior tarsi scarcely longer than 

 second. 



Deep black, dull ; first joint of palpi yellow ; antennae 

 brown; legs brown-red. Forehead almost entirely even; 

 thorax broadest in middle ; abdomen distinctly narrower 

 than elytra, latter very closely, former rather closely punc- 

 tured. L. 1\ 1. Not uncommon. S. opticus, Gr. 



II. Abdominal dorsal segments without basal ridges. 



1, Legs black. 



Elongate, cylindrical. Black, with some gray reflection, 

 not very shiny ; first joint of palpi yellow ; antennae 

 blackish. Frontal furrows shallow, interstice slightly 

 convex ; elytra rather longer tlian thorax ; abdomen long, 

 closely and strongly punctured. L. 2 1. Not very com- 

 mon. S. nigritulus, Gyll. 



2, Legs (except knees) red-brown. 



Similar to S. nigritulus but deeper black, antennae red- 

 brown, black at base, frontal furrows deep, interstice 

 convex, punctuation of fore parts not quite so close, and 

 elytra scarcely as long as thorax. L. If 1. Common. 



S. unicolor, Er. 



H, Fourth tarsal joint bifid to base, broader than third 

 joint. 

 a. Abdomen bordered. 



I. Legs black (tarsi and sometimes femora rather 

 lighter). 



Disc of thorax with two oblique depressions. 



1, Maxillary palpi black-brown, with first joint 

 yellow. 



A A. Abdomen narrowed at apex only. 



a a. Antennae red-brown ; sixth abdominal 

 segment of male with a deep triangular 

 - notch. 



Leaden-black, somcwliat dull, pubescence close ; antennae 

 red-brown, with first joint black ; tarsi blackish-brown. 

 Frontal furrows shallow; punctuation rather close and deep ; 



