246 JOHN L. LE CONTE, M. D. 



Group C First four joints of middle and hind tarsi with lateral grooves; 

 elytra without yellow margin : 

 a. Elytra deeply striate, with 4 or more dorsal punctures. — {fonsigcr.) 

 h. Elytra deeply striate, with 3 dorsal punctures, the 1st and 2nd near 



the 3rd stria. — {mdanarius, Iccvis.) 

 C. Elytra finely striate, with 3 dorsal punctures, the 2nd and 3rd near 

 the 2nd stria. — {coUaris, Harrisii, dixianus •■■Zimm.) 

 Series III. Tarsi without medial groove; claws bent somewhat backwards. 

 {Sericoda Kirby, Rhytiderua Chaud.) 

 Group A. Lateral grooves of tarsi very faint, sometimes visible only on the 

 basal joint : 



a. Elytra with 3 dorsal punctures. — (obsoktus.) 



b. Elytra with fovece on the third interval. — {bembidioides, stigmosus.) 



The species of division B — e have but three dorsal punctures, which 

 in general are not connected vrith the striae, but stand free upon the 

 3rd interval ; but few are thus far known, which may be grouped thus : 



Series I. Tarsi without medial groove: 



Group A. Tarsi without distinct lateral grooves. — {limbatus.) 

 Group S. First three joints of middle and hind tarsi with fine lateral 

 grooves. — [punctiformis, rubripes Zimm. ) 



Division B — f presents no special characters for grouping the spe- 

 cies, of which seruginosus and striatopunctatus may be taken as exam- 

 ples. 



In the species of C — g the lateral grooves of the first three joints of 

 the middle and hind tarsi are visible, but finer than usual; according 

 to the form of the prothorax the following groups are indicated : 



a. Prothorax nearly quadrate, or feebly cordate, with distinct though obtuse 

 hind angles. — {micans &c. of Europe.) 



6. Prothorax rounded oval, without distinct hind angles. — {lenis, picipennis, 

 lutulcntus.) 



Dic^LUS. — The species may be arranged as follows : 



A. Upper surface violet, or copper colored : 



a. Left mandible with a tubercle on the inner margin; — I. purpuratus ; 2. 



chah/beus; 3. violaceus, {cyaneus Dej. cortfusus Lee); 4. iricolor Lee. 

 6. splendldxis. 



B. Upper surface pure blcck : 



b. Both mandibles without tubercles. 



a. Elytra deeply striate, 2nd, 4th and 6th interval interrupted by an- 

 nular punctures : 6. sculptilis. 



h. Elytra deeply striate, all the intervals smooth; 7. dilatatus (of 

 which Dcjeanii is a larger Southern race,) 8. elongatus. 



c. Left mandible tuberculate at the middle : Q.furuits. 



d. Right mandible tuberculate on the outer margin; 10. teter. II. politus 



Dej. {Leonardi Harris.) 



[* I think this is merely au individual variation of mcercns Dej.] 



