TYCHIUS. 151 



1, Posterior femora with a strong, sharp tooth. 



Black ; antennae and tibiae red-brown ; under-side 

 covered with white scales, upper-side with coppery or 

 brassy ones, central line of thorax, suture and two spots on 

 each elytron (composed of short lines) white. L. 1^ — If 1. 

 Not common. T. quinquepunctattis, Lin. 



2, Posterior femora very obtusely toothed. 



A A. Thorax much narrower than elytra, only 



slightly narrowed behind and scarcely rounded 



at sides. 



Ovate. Black ; apex of rostrum, antennae, tibiae and 



tarsi rust-red; under-side with white scales, upper-side 



with gray and brown hairlike scales, central line and sides 



of thorax, suture ajid a broad longitudinal streak (formed of 



several confluent lines) at sides of elytra white. L. 1| — If 1. 



Eather common. T. venustus, Fab. 



S JB, Thorax a little narrower than elytra, more 

 or less narrowed behind, sides distinctly 

 rounded. 



a a. Scales narrow, hairlike. 



Elongate ovate. Black ; apex of rostrum, antennae, 

 tibiae and tarsi rust-red; under-side with white, upper-side 

 with hairlike brown scales, central line of thorax, suture 

 and alternate interstices on elytra whitish. L. 1^ 1. Pare. 



T. jpolT/lineatus, Germ. 

 b b. Scales roundish. 



Ovate. Pitch-brown ; greater part of rostrum, the an- 

 tennae and legs reddish-yellow; under-side with chalky- 

 white, upper-side with straw-coloured rounded scales. 

 L. 1| 1. Moderately common. T. squamulatus, Gyll. 



3, Femora not toothed. 



A A. Antennae red-yellow at base, black at 

 apex. 



a a. Eostrum gradually and slightly narrowed 



toward apex. 



Elliptic, not very convex. Black or brown; base of 



antennae, tibiae, tarsi, and often apex of rostrum red ; 



under-side closely covered with white, upper-side with 



hairlike, whitish-gray or yellowish scales, placed more 



