RHIZOPHAGUS. 447 



Mh i^oph af/ns, 



A, Elytra unicolorous brown-red or rust-red. 



a. Thorax finely punctured ; second interstice on elytra 

 widened and irregularly punctured in front. 



Eather flat. Light red-l^rown. Thorax rather longer 

 than broad, all angles rather blunt. L. 1 — 2 1. Kather 

 common. B. depress^ifi, Eab. 



h. Thorax strongly punctured ; second interstice on 

 elytra not punctured. 



I, Thorax not longer than broad ; sides of elytra some- 

 what dilated. 



Eather flat. Light brown-red or rust-red. Thorax 

 somewhat narrowed behind, anterior angles somewhat pro- 

 minent, more diffusely punctured than in 11. fcrruy incus ; 

 elytra with strong punctured striae. Knob of antennae 

 truncate at apex. L. If 1. Not common. 



M. crihratus, Oyll. 



II. Thorax a little longer tlian broad ; sides of elytra 

 not dilated. 



1. Length If — 2 lines. 



Somewhat convex, almost cylindrical. Eust-red. Thorax 

 scarcely at all narrowed behind, anterior angles rather 

 sharp, not very closely punctured ; elytra with strong punc- 

 tured striae. Common. B. ferruglneus, Payk. 



2, Length 1| lines. 



Eather broad, flat. Eust-red. Thorax scarcely nar- 

 rowed behind, anterior angles prominent, punctures dif- 

 fusely placed, large, oblong, rather shallow ; elytra with 

 rather fine punctured striae. Knob of antennae oval. 

 Eather common. B. perforatus, Er. 



J5. Elytra with disc black or brown, margins lighter. 



Second interstice on elytra not punctured ; sides of 

 thorax not dilated. 



a. Elytra without lighter spots. 



I, Thorax ratlier longer than broad. 



Eather flat. Eed-brown, disc of thorax and elytra, breast 

 and base of abdomen more or less brown or l)lackish; tlie 

 lightest specimens unicolorous brown-red. Thorax scarcely 



