CARABIDAE. 1 3 



the inner lobe rounded at the apex, entirely destitute of the usual 

 terminal hook. 



The thorax is usually much narrowed behind, without posterior 

 angles, the chief exception being in Pasimachus, where the angles 

 are distinct; the margin is frequently obsolete; the posterior coxa? 

 are entirely enclosed. The trunk is pedunculate in front, the meso- 

 sternum declivous, the side pieces diagonally divided, with the 

 epimera reaching the coxa?; the side pieces of the metathorax are 

 sometimes short, without epimera (Pasimachus), sometimes long, 

 with distinct epimera. The anterior tibia? are dilated, produced 

 at the apex, and frequently toothed externally; they are deeply 

 emarginate internally, with the inner tooth remote from the apex. 

 The anterior tarsi of the male are rarely dilated. 



This tribe contains two groups, as follows : — 



Group I. — Scarites. 



Basal joint of antenna? very long ; base of maxillae covered. 



These are insects of moderate or large size, found under stones, 

 or {Pasimachus elongatus Lee.) running on the ground. The 

 genus Pasimachus is confined to Xorth America; most of the spe- 

 cies are margined with blue. 



Maxillae rounded at tip ; hind angles of thorax distinct. Pasimachts. 

 Maxilla? hooked ; posterior angles of thorax none. Scakites. 



Group II. — Clivinae. 



Basal joint of antenna? not elongated; base of maxilla? exposed. 

 Species of small size, mostly found in moist places, though some 

 occur under bark of trees. 



Ligula not prolonged into a point. Dyschikius. 

 Ligula prolonged. 



Lateral lobes of the mentum entire. 



Mandibles slender, prolonged ; clypeus truncate. Ardistomis. 



Mandibles fiat, acute ; clypeus emarginate. Aspidoglossa. 



Mandibles flat, acute ; clypeus not emarginate. Clivina. 



Lateral lobes of the mentum emarginate. Schizogenius. 



In Ardistomis and Aspidoglossa the anterior tarsi arc dilated, 

 but more strongly in the males than in the females. These two 

 genera do not occur on the Pacific coast; the others are widely 

 distributed. Acephorus Lee. is suppressed, as not sufficiently 



