POLYDROSUS. 231 



large, strongly convex behind ; posterior femora feebly 

 toothed. L. 3| — 4 1. Eather common. P. mi cans, Fab. 



Metallites, 



Pitch-black; antennae and legs reddish-yellow-brown; 

 rather closely covered with gray, slightly metallic hairs. 

 Tliorax as long as broad, sides moderately dilated ; scutel- 

 lum miich broader than long, truncate ; elytra with deep 

 punctured striae, interstices double as broad as punctures ; 

 anterior femora with pointed tooth, punctuation close. 

 L. 1-^ — If 1. Eather common. 3£. marginatus, Steph. 



Sitones. 



A . Thorax truncate in front and behind, moderately dilated 

 in middle, sides rather angular than rounded ; elytra 

 convex, narrowed in posterior third-part and somewhat 

 pointed at apex. 



a. Elytra elongate, more than twice as long as together 

 broad. 



Elongate. Black ; covered with brown scales, thorax 

 with three indistinct lines, elytra with a broad common 

 spot (spotted with black on each side) of gray scales ; 

 femora with whitish scales and a brown band before apex. 

 Thorax almost broader than long, punctured in wrinkles, 

 with central furrow, sides rounded in middle : i-lytra nearly 

 two and a half times as long as thorax, A\'iihout erect 

 bristles. L. 3 1. Eather common. S. ;/ '■iseus,Ya,'b. 



b. Elytra not elongate. 



I, Eyes flat, or, if somewhat promineju thorax dis- 

 tinctly longer than broad. 



1. Upper-side with gray, brown, or greenish scales ; 

 interstices on elytra more or less convex. 



A A. Anterior margin of thorax not raised, 



a a. Thorax as broad as long. 



Oblong. Black ; base of antennae and tibiae rust-brown ; 

 closely covered on upper-side with gray or brown, on under- 

 side with whitish-gray scales. Thorax with three lines of 

 light scales ; elytra with or without alternate interstices 

 lighter, sometimes partly checkered with black. Thorax as 

 long as broad, very finely punctured, broadest in middle ; 



