CARABIDAE. 1 1 



or between the first and second striae ; the interval between the 

 second and third striae is usually marked with one or more deep 

 punctures. The apex of the elytra is truncate, sinuate, or rounded. 

 The numerous genera found in the United States indicate the 

 following tribes, which, with the exception of the first four and the 

 last, are separated by very indistinct and indefinite characters: — 



Abdomen with seven ( 9 ) or eight ( % ) ventral segments. I. Brachinini. 

 Abdomen with six ventral segments in both sexes ; 



A. Elytra without ocellate punctures (paraglossae wanting). 



II. PaNAGjEINI. 



B. Elytra with ocellate marginal punctures ; 



A. Paraglossae wanting ; antenna much compressed, or moniliform ; 

 anterior tibiae dilated ; 

 Elytra entire. III. Morionini. 



• Elytra truncate. IV. Helluonini. 



b. Antenna? filiform, or nearly so ; paraglossa? free or connate ; 



a. Head with a slender neck ; antennae with the first joint elon- 



gate ; elytra truncate. V. Dryptini. 



b. Antennas with the first joint not elongate, joints 1 — 3 glabrous ;* 



Elytra truncate or rounded ; head usually with a slender 



neck ; ligula free at the apex. VI. Odacakthini. 



Elytra truncate ; neck either indistinct or moderately slen- 

 der ; ligula not free at the apex. VII. Lebiini. 

 Elytra obliquely sinuate ; abdomen not pedunculated ; 

 Anterior tarsi of £ with two series of papillae. 



VIII. Pterostichini. 

 Anterior tarsi of % densely spongy-pubescent ; 



Labrum emarginate and impressed. IX. Licinini. 



Labrum not impressed. X. Chljeniini. 



c. Antennae with the first joint not elongate ; joints 1 — 4 glabrous; 



Elytra rounded ; abdomen pedunculated. XI. Broscini. 



d. Antennae with the first joint not elongated, third jo.lit more or 



less pubescent ; 

 Anterior tarsi of % (?) with one joint dilated ' 



XII. Ste;;omorphini. 

 Anterior and middle tarsi of £ with four joints or none 



dilated. XIII. Harpaliki. 



Anterior tarsi of % with two joints obliquely dilated ; 

 Palpi with the last joint cylindrical, truncate. 



XIV. Patrobini. 

 Palpi with the last joint conical acute. XV. Trechini. 

 Palpi with the last joint small subulate. 



XVI. Bembidiini. 



* Except in certain foreign species of Pterostichini, and in Trechicus. 

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