MONOTOMA. 491 



legs rust-red. Elytra broadest at shoulders. L. 1^ 1. 

 Moderately commou. M. angusticollis, Gyll. 



2, Thorax only a little longer than broad. 



Lighter or darker brown. Elytra broadest in middle. 

 L. l| 1. Moderately common. M. formicetorum, Th. 



II* Elytra much broader than thorax. 



Pitch-black ; elytra brown, with reddish shoulders ; an- 

 tennae and legs rust-red. Thorax somewhat longer than 

 broad, with anterior angles sharply pointed ; elytra double 

 as long as thorax. L. 1 1. Moderately common. 



M. spinicollis, Aub. 



b» Thorax not narrowed in front. 



I, Forehead with two depressions. 



1, Anterior angles of thorax not prominent ; elytra 

 punctured in wrinkles. 



Blackish or dark-brown ; antennae and legs rust-red. 

 Thorax with two deiDressions, sides notched. L. f — |- 1. 

 Common. M. picipes, Herbst. 



2. Anterior angles of thorax bluntly prominent; 

 elytra with shallow punctured striae. 



Blackish-brown ; shoulders of elytra yellowish ; antennae 

 and legs reddish. Thorax with two depressions on posterior 

 angles, sides bluntly notched ; elytra short, punctures very 

 diffuse at apex. L. f 1. Not common. M. brevicollis, Aub. 



II, Forehead without depressions. 



Black ; elytra reddish, darker round scutellum ; antennae 

 and legs red-yellow. Thorax with distinctly prominent 

 anterior angles, and two very indistinct depressions at 

 base, sides scarcely notched ; elytra punctured in wrinkles. 

 L. I 1. Eather commou. M. quadricollis, Aub. 



jB. Head and thorax rather finely punctured. 



«. Thorax as broad as long, with four shallow depres- 

 sions (often confluent into two furrows) on disc. 



I, Thorax with broad separate side border. 



Eeddish-yellow. Head gradually narrowed from eyes 

 forward ; elytra rather flat. L. 1 1. Eather common. 



M. rufa, Eedt. 



II. Thorax with narrow, feeble separate side border. 



