Pferosfichiis.] adephaga, 61 



2. Elytra without scutellary stria Pkdius, Mots. 



ii. Tarsi witli a distinct furrow ruiniing along the middle 

 of their dorsal surface; elytra without scutellary 



stria Lagarus, Chaud. 



II. Elytra without pores on the third interstice; seventh 



interstice raised, somewhat costiforin at base .... Abax, Bon. 



Tlie sub-genus Ptero.dichus may be further subilivided as follows:— ^ 



I. Metathoracic episterna as broad or almost as broad as 



long. 



i. Posterior angles of thorax rounded ; elytra witli a dis- 

 tinct stria between the series] of large pores and 

 side margin Steuopus, Meg. 



ii. Posterior angles of thorax well marked ; elytra with- 

 out distinct stria between tlie series of large pores and 

 side margin. 



1. Metallioracic episterna a little lonijer tlian broad ; 

 upper surface lighter or darker bronze ; a|)ex of 



elytra produced Platysma, Bon. 



2. Metathorncic episterna fully as broad as long; 

 elytra black with iridescent reflection ; apex of 



elytra not produced PxEEGSTlcnus, i. sp. 



II. Metathoracic episterna distinctly longer than broad. 



i. Apical joint of palpi cylindrical, truncate ; lateral 

 margin of thorax as a rule broad with a distinct chan- 

 nel on its inner side ; species larger. 



1, Thorax with posterior angles rounded or almost 



rounded ; shoulders of elytra rounded simple . . . Ltperus, Chaud. 



2. Thonix with ])Osterior angles very distinct, usually 

 sharp and pointed ; shoulders of elytra rounded, fur- 

 nished with a small tooth OjiaSKUS, Ziegl. 



ii. Apical joint of palpi long oval, hardly truncate ; lateral 

 margin of thorax narrow without channel ; species 

 smaller Aegutoe, Meg. 



(Sub-Gen. Poeoilus, Bonelli.) 



I. Lateral border of thorax explanate at base. 



i. Head thickly punctured P. crPHETS, L. 



ii. Head smooth or almost smooth P. VEESICOLOH, Sturm. 



II. Lateral border of thorax not explanate. * 



i. 'I'horax co])pery red, elytra green, the former not or 



scarcely contracted behind P. DIHIDIATUS, 01. 



ii. Thorax and elytra concolorous, the former distinctly 



contracted behind P. LEPIDU8, F. 



P. cupreus, L. Oblong, female ntore oval, winged ; colour very 

 vaiiable, green, brassy, coppery, purplish, or nearly black ; antennjp, 

 black with two joints at base red; thorax subquadrate narrowed in front, 

 sides moderately rounded, broadly margined, posterior angles not quite 

 right angles, with plain central furrow and two depressions at base, the 

 outer one somewhat obsolete and close to angle; elytra broader than 

 tliorax, rather flat, moderately deeply striated, the third interstice with 

 three distinct pores behind ; legs black. L. 10-12 mm. 



