64 I'AMILV II. (/A 



The internal elytral fold mentioned in the key can only be 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. HARPALiy.V Zf/tfflTON.7-,'. 



This section is divi<!< <1 by Horn into 2 -I tribes, of which 12 are 

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

 probably occur. 



KEY TO INDIAXA TRICES OF HARPAUX.E BISETOS.K. 



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



the outer side. 

 /*. Antenna- slender, with at must twi> basal joints glabrous; abduininal 



segments entirely conic; <ns or hi.rn-like. 



c. Last joint of palpi awl-shaped: mesnsternal epimera wide; length 

 less than S mm. Tribe IV. BEMBIDIINI, p. 67. 



re. Last joint of palpi slender, elc.ngale or subcylindrical : mesoster- 

 nal epimera narrow. Tribe V. POOOXIXI, p. 80. 



lib. Antenna- monilifcrm or bead-like, d ur basal joints glabrous; ab- 

 dominal segments :\. 4 and 5 narrowly coriaceous or leather-like 

 on their hind margins. Tribe II. NOMIIXI, p. lit;. 



(ia. Mandibles without a bristle-bearing puncture in the scrobe. 



<1. Margin of elytra interrupted at posterior third and with a distinct 



internal fold. 



e. Four basal joints of antenna? glabrous; body slightly pedunculate: 

 antenn.-e moniliform ; front tibi;e dilated; length 12-ir, mm. 



Tribe III. MORIOXIXI. p. <;<;. 

 <'. Three (or fewer) basal joints of antenna 1 glabrous. 



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

 lar neck; last joint of maxillary palpi arising obliquely from 

 the preceding joint. Tribe I. PANAG.EIXI, p. >.">. 



//. Head not constricted behind the eyes: last joint of maxillary 

 palpi arising normally from the end of the preceding joint. 



Tribe VI. PTEROSTICHINI. p. ss. 

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



fold. 

 {/. Front of head short; labrum impressed. 



Tribe VII. LICIMM. p. 11 

 ////. Front of head normal. 



//. Next to last joinl of labial palpi \vith but two bristly hairs. 



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



and dilated behind into a semiglohular knob. 

 j. Elytra entire. Tribe X. < 'i r-:\onA( TYLINI, p. l.'JT. 



/'/. Rlyti'a truncate: three basal joints <>! aiiteinre glabrous. 



Tribe XI, OUACANTHINI, p. .i:;s. 



