282 BllACHELYTKA — rAEDERIDAE. 



St Ulcus, 



A. Punctuation of thorax close and deep, not wrinkled ; 

 body very slender ; length 3 lines. 



Black ; thorax, scutellum, mesosternum, anterior legs and 

 base of intermediate legs red ; the rest of intermediate legs 

 and the posterior legs pitch-black, tarsi yellow-brown ; 

 antennae red-brown; elytra pitch-black, apical angles or 

 extreme apex yellow. Not uncommon. S. fragilis, Gr. 



J3. Punctuation of thorax more or less wrinkled ; body 

 less slender ; length 2 — 2| lines. 



a» Smooth middle line of thorax efi'aced in front. 



Black, head and thorax dull ; antennae and legs brown- 

 red, coxae dark brown ; elytra dark pitch-brown, gradually 

 lighter at apex, rather diffusely and (especially behind) 

 finely punctured, somewhat shiny. L. 2-| 1. Common. 



S. rufipes, Germ. 



b. Smooth middle line of thorax more or less distinct 

 throughout. 



I, Elytra not lighter at apex. 



Black ; antennae brown-red ; legs red-yellow, hinder 

 coxae blackisli, apex of femora (especially hinder ones) 

 blackish-brown. Punctuation closer than in S. rujipes, tlie 

 difference between that of basal and apical parts of elytra 

 less perceptible. L. 2| 1. Ptather common. *S'. suhtilis, Er. 



II. Elytra pitchy, lighter at apex. 



1, Elytra rather closely and strongly punctured. 



A A. Legs red-yellow, with all coxae pitch- 

 lirown. 



Black ; antennae yellow-brown. Smooth middle line of 



thorax distinctly raised. L. 2^1. Scarce. S. similis, Er. 



J3 jB. Legs clear yellow, apex of hinder femora 

 blackish. 



Black ; antennae yellow-brown. L. 2^ 1. Not common. 



S. geniculatus, Er. 



2» Elytra rather diffusely and finely punctured. 

 A A. Legs yellowish, with apex of femora and 

 the tibiae brownisli. 



