64 FAMILY II. r'AEABID^. 



The internal elytral fold mentioned in the key can only he seen 

 by lifting one of the elytra. Its purpose is to afford a means of 

 support to the edge of the abdomen, and at the point of origin of 

 the fold behind, the last ventral segment is held firmly when the 

 insect is in repose. 



Section I. HARPALISJE BISETOS-i:. 



This section is divided by I-lorn into 2-t tribes, of which 12 are 

 known to be represented in Indiana, while members of two others 

 probably occur. 



KEY TO ISDIAXA TBIBES OF HAKPALIX.E BISETOS.E. 



a. Mandibles with a bristle-bearing puncture in the groove (scrobe) on 

 the outer side. 

 h. Antennae slender, with at most two basal joints glabrous; abdominal 

 segments entirely corneous or horn-like. 

 c. Last joint of palpi awl-shaped ; mesosternal eiJimera wide ; length 

 less than S mm. Tribe lY. BEMEnnxi. p. 67. 



cc. Last joint of palpi slender, eloni^rate or subcylindrical : mesoster- 

 nal eplmera narrow. Tribe V. Pogo?si^i. p. S6. 

 hh. Antennfe monlliform or bead-lilie. four basal joints glabrous : al> 

 dominal segments 3. 4 and o narrowly coriaceous or leather-like 

 on their hind margins. Tribe II. Xomiixi. p. i;0. 

 aa. Mandibles without a bristle-bearing puncture in the scrobe. 



d. Margin of elytra interrupted at posterior third and with a distinct 

 internal fold, 

 e. Four basal joints of antennie glabrous : body slightly pedunculate : 

 antennae monlliform ; front tlbise dilated ; length 12-1(5 mm. 



Tribe III. Morioxi>-i. p. 66. 

 ce. Three (or fewer) basal joints of antennne glabrous. 



f. Head constricted behind the eyes, then dilated to a semi-globu- 

 lar neck ; last joint of maxillary palpi arising oblitiuely from 

 the preceding joint. Tribe I. PAXAG.i:ixi. p. O.",. 



//. Head not constric-ted behind the eyes: last joint of maxillary 

 palpi arising normally from the end of the preceding joint. 



Tribe VI. Ptebostichixi. p. ss. 

 dd. Margin of elytra not interrupted posteriorly and without an internal 

 fold. 

 g. Front of head short ; labrum impressed. 



Tribe VII. Licixi^i, p. 112. 

 gg. Front of head normal. 



li. Next to last joint of labial palpi with liut two bristly hairs. 

 /. Head elongate, prolonged behind the eyes: neck constricted 

 and dilated behind into a semiiilnbular knob. 

 j. El.vti-a entire. Trilie X. CTE>;onACTi-T,ixi. p. i:',T. 



JJ- Elytra truncate'; tbiet- b:is:il joints of ant<?nn:e glabrous. 



Tribe XL Odacasthini. p. las. 



