amalUs. 1:^1 



and closely punctured ; elytra with deep punctured striae, 

 interstices narrow, even. L. | 1. Not uncommon. 



A. scortillum, Herbst. 



Rhiuoncus, 



A, Thorax with two (or without any) tubercles. 

 <*. Central furrow on thorax indistinct. 



I, Interstices on elytra wrinkled, or granulated in 

 wrinkles. 



1, Body short ovate ; elytra not, or only slightly 

 longer than together broad ; femora clubbed 

 toward apex. 



Black ; antennae and legs brown or rust-red ; under-side 

 and lateral margin of elytra thickly covered with white 

 scales ; upper-side with fine gray hairs, base of suture with 

 a white spot. Thorax very closely and strongly punctured, 

 with a small, indistinct tubercle on each side ; elytra with 

 distinct punctured striae, interstices finely granulated in 

 wrinkles. L. 1^ — 1^ 1. Common. R. pericarpiics, Fab. 



2, Body ovate ; elytra distinctly longer than together 

 broad ; femora slightly thickened near middle. 



Black, sprinkled with white ; under-side and an oblong 

 spot at scutellum covered with white scales ; base of an- 

 tennae, tibiae and tarsi (sometimes also femora) yellow- 

 brown. Thorax almost cylindrical, central line and a line 

 on each side more thickly covered with white scales ; elytra 

 with deep punctured striae, interstices narrow, somewhat 

 wrinkled. L. 1 — 1^ 1. Rather common. 



B. siihfasciatus, Gyll. 



II, Interstices on elytra with distinct tubercles. 



Black ; antennae and legs rust-red ; under-side thickly 

 covered with white scales, sides of thorax and its central 

 line with whitish ones, elytra speckled with small grayish 

 spots (especially behind), with an oblong white, or whitish- 

 yellow, oblong spot at base of suture. Thorax with a 

 blunt tubercle on each side in middle, strongly and closely 

 punctured ; elytra with striae, the side ones distinctly 

 punctured, interstices rough, with many small tubercles 

 behind. L. 1 1. Common. R. castor, Fab. 



h. Central furrow on thorax distinct. 



