SITONES. 233 



convex, elongate and almost parallel-sided ; eyes toler- 

 ably prominent. 



a. Upper-side with short, silky, recumbent pubescence. 



J. Sides of elytra parallel. 



1, Thorax as long as broad. 



Oblong. Black ; base of antennae, tibiae and tarsi red- 

 yellow ; unequally covered with white, silvery or slightly 

 greenish scales ; thorax with three badly defined light 

 lines ; elytra with scales placed more closely on suture, 

 side and some streaks on disc. Thorax about as broad as 

 long, sides more rounded than in S. lineelhis, less deeply 

 punctured; elytra with distinct punctured striae. L. 1| 1. 

 Common. S. tibialis, Herbst. 



2, Thorax broader than long. 



Oblong-ovate. Black; antennae (except club) and tibiae 

 red-yellow ; scantily and nearly evenly covered with 

 whitish scales, placed a little more closely toward sides of 

 thorax. Thorax much broader than long, more rounded at 

 sides than in >S'. lineellus, more closely punctured in wrinkles ; 

 elytra with deep punctured striae. L. 1^ — IJ 1. Not 

 common. S. hrevicollis, Schoenh. 



U, Elytra narrower at base than in middle. 



Oblong. Black; antennae, tibiae and tarsi rust-red 

 covered with brown scales, with three well defined white 

 lines on thorax, and on elytra sides and a dorsal streak or 

 lines white. Thorax as long as broad or rather longer, 

 deeply punctured, sides somewhat rounded; elytra with 

 moderately strong punctured striae, with some short 

 bristles behind. L. 1| 1. Eare. S. lineellus, Gyll. 



6. Elytra with erect hairs behind. 



I. Interstices on elytra convex, not all equally raised. 



Elongate. Black, scantily covered with gray scales ; 

 antennae and legs red-yellow. Head broad, coarsely punc- 

 tured, with strong furrow, reaching to middle of rostrum, 

 latter about as long as head and not much narrower ; eyes 

 very prominent ; thorax oblong, slightly dilated at sides, 

 flat, sides more or less closely covered with scales, disc 

 sometimes glabrous ; elytra with deep punctured striae, 

 interstices very narrow, convex, wrinkled, second and fourth 

 distinctly raised and more or less covered with gray and 



