182 BRACIIKLYTRA — ALEOCHAEIDAE. 



colouv, shorter elytra and narrower head. L. 1-^- 1. Rare ; 

 Edinburgh. 0. edinensis, Sharp. 



b b. Second joint of antennae distinctly longer 

 than third. 



A a. Antennae lighter at base. 



A 1. Thorax half as broad again as long, 

 with a more or less distinct central 

 furrow. 



Elongate. Brown-black, dull, with silky pubescence ; 

 elytra a little lighter ; base of antennae and palpi dark 

 red-yellow ; legs yellow. Allied to 0. umhrata but with 

 thorax and elytra not quite so finely punctured, former less 

 transverse, and abdomen less pointed at apex. L. 1| 1, 

 Somewhat rare. 0. pcctita, Sharp. 



H 1. Thorax nearly twice as broad as 

 long, without central furrow. 



Black, with silky pubescence ; base of antennae and 

 elytra brown-yellow ; legs red-yellow. Thorax rather 

 short, with a small depression at base ; elytra one-tliird 

 longer than thorax, distinctly punctured. L. 1\ 1. liatlier 

 common. 0. umhrata, Gr. 



2? b. Antennae unicolorous. 



Black, dull, with silky pubescence; legs brownish; body 

 spindle-shaped, very closely punctured. Smaller than 0. 

 umbrata, usually of an uniform sooty-black colour, antennae 

 rather shorter, terminal joint comparatively short and ob- 

 tusely pointed, thorax with a very indistinct central fur- 

 row, elytra rather less strongly notched at posterior outer 

 angle, tarsi (especially posterior pair) shorter. L. 1 1. 

 Not common. 0. niyrina, Wat. 



3, Length f line. 



Black, rather shiny ; thorax and elytra pitch-brown ; 

 apex of abdomen dark red-brown ; antennae blackish- 

 brown, first joint yellow-brown ; legs reddish-yellow. 

 Thorax more than half as broad again as long, slightly 

 convex ; elytra scarcely as long as thorax, rather more 

 closely and less finely punctured ; abdomen distinctly 

 narrowed, closely punctured at base, almost impunctate at 

 apex. 0. exigua, Er. 



