rATROBUS. 77 



Patvolnis, 



A . Insect apterous. 



a. Head smooth ; striae on elytra rather indistinct at 

 sides and apex. 



Pitch-brown above, more red beneath ; antennae darker, 

 legs lighter red. Thorax rather convex, contracted behind, 

 heart-shaped, posterior angles sharp right angles or some- 

 what acute, basal depressions deep and strongly punctured ; 

 elytra oblong ovate, with closely punctured striae, tliird 

 interstice with three impressions. On the under-side the 

 prothorax is deeply, the nieso- and metathorax distinctly 

 punctured. L. 3i— 4 1. Connnon. P. excavatics, Payk. 



b. Forehead finely wrinkled transversely ; striae on 

 elytra ellaced behind. 



Similar to P. excavating, but smaller, the thorax more 

 convex, narrower at base ; tliird interstice on elytra much 

 wider than second. L. 3| 1. Eather common. 



P. assi'milis, Chaud. 



JS. Insect w^inged. 



Pitch-black, antennae dark brown, legs rust-red, femora 

 darker. Thorax shorter than in P. excavatus, less narrowed 

 behind ; elytra rather longer and less rounded at sides, 

 striae much finer beneath, tlie prothorax not quite so 

 strongly punctured, sides of metathorax almost smooth. 

 L. 3| — 4 1. Not uncommon. P. septentrionis, Dej. 



I^of/oniis, 



A. Head, and thorax bright green, elytra yellow. 



Under-side bronze-green ; antennae light reddish-yellow ; 

 legs pale yellow. L. 3 — 3i 1. Eather connnon. 



P. luridijyennis, Germ. 



J?. Upper-side unicolorous. 



a. Sides of thorax more rounded ; elytra elongate, sides 



nearly parallel. 

 Bronze-green ; antennae l)rown-black ; legs rust-red, 

 femora darker. Thorax narrowed in front and behind, the 

 sides rounded; elytra with punctured striae, which are 

 feebler at sides and apex. L. 3| 1. Eather common. 



P. littoralis, Duft. 



