AGABUS. 119 



a a. Elyti-a very finely wrinkled; body oblong. 



Black ; liead red in front, with two pale spots behind ; 

 thorax pale reddish-yellow, with anterior and posterior 

 margins black, (or nearly black, with sides alone pale) ; 

 elytra brown, side margin pale ; margins of abdominal 

 segments and the legs red-yellow ; sternum dull red. 

 L. o| 1. Eatlier common. A. arcticus, Payk. 



b b. Elytra with very tine network ; body 

 oval. 

 Slightly convex, not very shiny. Head and thorax 

 black, sides of latter light brownish -yellow ; elytra brown, 

 base and sides brownish-yellow ; under-side black ; legs 

 red-brown, posterior femora pitch-black. Male with swim- 

 ming hairs beneath all joints of posterior tarsi. L. 3 J- 1. 

 Conimou. A. Sturnii, Scliouh. 



II. Head and thorax without a network of scratches. 



1. Disc of elytra lirownish-black, very finely punc- 

 tured (besides the very distinct irregular rows) ; 

 male with swimming hairs beneath all joints of 

 posterior tarsi. 



Ovate, convex. Brownish-black, shiny ; sides of thorax 

 and elytra and the legs reddish. Upper-side veiy finely 

 punctured. Male with outer claw of anterior tarsi double 

 as broad as inner one, deeply notched at base and with a 

 strong, short tooth in middle. L. 3| 1. Not uncommon. 



A. uliginosus, Lin. 



2. Disc of elytra acorn-brown, without punctures 

 (except usual rows) ; male with swimming hairs 

 beneath first two joints of posterior tarsi. 



Oval, flatly arched, very shiny. Head and thorax black, 

 sides of latter red ; elytra acorn-brown, with sides light 

 brown ; under-side black ; reflexed margin of elytra light 

 brown ; legs brown-red, all femora and hinder tibiae black. 

 L. 3f 1. Common. A. intludosus, Fab. 



b. Elytra either black, with two light spots on each, 

 yellowish with black markings or entirely brown-red. 



J. Length 3f — 4 lines. 



1. Thorax black. 



xi A, Anterior liglit spot on elytra round. 



