'I'lii- V \i,'i !•:(;. \'i'i:r Airii-i.(t\-i\(, i;i;i;'ri ks. 663 



presence or ;il)S"iife oi" the posi -iih mko./iiI Inn . This is ;iii eh'\;ile<I 

 line on the niet;isternuiii wliirh "l)e,iiins ;il llic iiiiddh' nl' \\\r hind 

 bni'dei- ol' file middle eoxa' ;iiid ''\1ends ()i)li(|iiel v luickw ;ii'd. jdinincr 

 ihe suture lietween llle Uiet ;ist en i ll!li ;illd its <'| )is1 el'lMI ill. ' " Tile 



first venti'id se^meiil hears a sliMdidatini'' oi'jiaii in tlie shape i>l' an 

 ( levated curved rido-s' \\hieh is fiiiely sli-iale ti'ansvei'sely. and when 

 rnhhed hy the hind leiix. pi'odnces a ipiile distinct sonnd. ()!' Ilie 

 11 species I'ecDgnized hy Ilnrn, seven ha\-e been taken in Indiana, 

 w Idle anollier may ciceur. 



KKV TO INDIANA SI'KeiT'.S OF UKIKHOCKKl S. 



(t. 'I'lierax with a pale median stripe; stridiiiatiiiir ridj^e of lirst ventral 

 soiTineiit complete, loniiini:- nearly a seiiiicirele : an elevated oldiiiiii' 

 line on the epiplenra near the base. ( Fi.i;. 2r)(;. e.) 



1.">(>2. AlHOM ICANS. 



an. Thora.x without a pale ine<li;in stripe: stridnlaf in,^' ridire of tirst ven- 

 tral iiiconiidete. extendiii.^ IVeiii lh(> fmnt aiii,Me in a curved line to 

 hind herder; epipleui'a without an oldiiine elevated line near tlu' 

 base. 

 h. Metasteriiuin without a post-inesocoxal line; elytra never with a spot 

 at base near suture 

 c. Labruni of male narrowed at tii) and ]irolon.i_'ed forward in a 

 process; size larger, 6 nun.; elytra obsoletely sulistriate. 



1. '>();{. VENTRALIS. 



(v. Lalii'uin of male iinf prolonged forward in a process; size smaller, 

 n(.t over 4..") mm.; elytra usually distinctly substriate. 



i;504. X'NDAILS. 



hb. .Mctastermim willi ;i iiost-inesocoxal liiu'. 



(/. JClytra usually browinsh or jiicecus, always with more or less dis- 

 tinct dull yellow sjiots or markings; mandibles of male without 

 basal lolte extending over the labruni. 

 c. Elytra withtait a pale spot at base near suture. 



/. Elytra usually substriate. the iiale markings miicli bmken ; 

 legs more or less piceous ; larger, ;;.5-4 mm. 



1. ">(».">. BRL'NNRIS. 



ff. Elytra not substriate. the markings well defined and broad; 

 legs wholly jiale; length not over :'. mm. sc iiWAKZr. 



re. Elytra with a jialc spot at base near suture. 



g. General color nf u|i]per surface brownisli or pale; thorax mere- 

 ly slightly darker at middle: mandililes of male with an 

 angulate basal lobe ou outer side. l.'tOO. coltaris. 



gg. Genera.l cnlor iiiceous; tlmrax iiiceous. often sliarply bordered 

 with jiale; mandibles of male not iirominent at base. 



1.">()T. TIUSTIS. 



(hJ. Elytra jiale without yellow marks, often with a bi-oad fuscous 

 sutural si)ace; nuindibles of male with a basal lobe extending 

 over the base of labrum. \'\0'A. pusitLUS. 



