54 (lEODEl'llAGA GAKABIDAE. 



side at base, without any I'old ; elytra with a distinct short 

 scutellavy stria. Antennae as long as head and thorax ; 

 sides of latter somewhat contracted behind and curved 

 inward, with sharp angles; elytra not distinctly sinuate 

 before apex, shoulders rounded, but with small teeth ; 

 insect generally apterous. Tooth of mentum broad, 

 moderately deeply emarginate ; anterior male tarsi slightly 

 dilated. Species small. [Arguto7% Meg.] 



A A, Under-side of thorax punctured at sides. 



Pitch-black ; antennae, palpi and legs brown-red. Thorax 

 as long as broad, posterior angles acute ; striae on elytra 

 near suture deep and strongly punctured, the outer ones 

 fine and almost smooth. L. 3 1. Common. 



P. sfrcnuus, Panz. 



JB JB, Under-side of thorax not punctured. 



Black, shining ; antennae, palpi and legs pitch-brown, 

 first joint of the former often reddish. Thorax as long as 

 broad, posterior angles acute ; inner striae on elytra finely 

 punctured, outer ones almost as deep as inner. L. 2| 1, 

 Common. P. diligens, Sturm. 



JI, Episterna of metathorax not much Ijroader than 

 long. 



Thorax toleraljly fiat, the sides somewhat sinuate behind, 

 with sharp posterior angles and a deep longitudinal im- 

 pression on each side; elytra sinuate and bluntly pointed 

 at apex, wdth a row of impressions in the third interstice ; 

 tooth of mentum deeply emarginate. 



1. Upper-side bronze-black ; thorax as long as 

 broad ; antennae slender. 



Under-side black ; palpi, til)iae and tarsi reddish-pitch- 

 brown. Third interstice of elytra with five (rarely four or 

 ,six) impressions. L. 5 1. Patlier common. 



P. ohlo'iKjopHnctatus, Fab. 



2, Upper-side deejo-ldack ; thorax broader than 

 long ; antennae thick. 



Under-side black. Third interstice of elytra with five or 

 six impressions. L. 5 1. Not uncommon. P.vitretis,Dej. 



III. Episterna of metathorax not longer than broad. 



1, Postcnior angles of thorax and generally also 

 shoulders of elytra rounded. ** 



