PAEDERUS. 287 



femora blackish, of tarsi brownish. L. 3i 1. Coinmon. 



P. littoralis, Gr. 



h. Antennae blackish, with yellow base ; thorax distinctly 

 narrowed behind, a little narrower than elytra. 



Head black ; thorax and mesosternum red ; elytra blue, 

 not much longer than thorax ; abdomen with first five seg- 

 ments red and apex black ; legs red-yellow, apex of femora 

 blackish, that of tarsal joints and the last joint usually 

 brownish. L. 3f 1. Common. P. riparius, Lin. 



J5. Tibiae and scutellum dark brown or blackish. 



fi» Elytra about half as broad again and half as long 

 again as thorax. 



Coloured like P. riparius, but with mesosternum, scu- 

 tellum, tibiae, and apex of tarsi blackish. Thorax not much 

 narrowed behind. L. 3| 1. Not common. 



P. f'uscipes, Curt. 



h. Elytra not much broader and longer than thorax. 



Elongate. Coloured (except scutellum and legs) like 

 P. riparius. Punctuation diffuse and strong. Thorax 

 slightly narrowed behind. L. 3 1. Moderately connnon. 



P. caligatus, Er. 



STENIDAE, 



A, Tarsi with four joints. 



Labrum very broad, with more or less closely placed 

 sharp teeth in front ; maxillary palpi with first joint elon- 

 gate, not much shorter than second, third almost as long as 

 first and second together, fourth very small and incon- 

 spicuous; ligula broad, entire, paraglossae soldered to ligula; 

 labial palpi, with first joint small and narrow, second rather 

 longer, strongly dilated, third not much shorter, very fine. 

 Antennae inserted at some distance from eyes, which are 

 small. Evaesthetus, Gr. 



-B. Tarsi with five joints. 



a. Paraglossae soldered to ligula throughout. 



Labrum four times as broad as long, margin entire ; 

 maxillary palpi more elongate than in Stemis, with third 

 joint less thickened toward apex ; ligula bilobed, the parts 

 further separated than in Stenus ; labial palpi rather shorter 



