l^^Ofi FAMILY LXV. RIHPIPTIORlD.iS. 



rated aloii^ the suture; tarsal claws bifid at tip. The larvre are 

 parasitic on the yoimp; of wasps. Foni- of the eight recognized spe- 

 cies have been taken in Indiana, whih^ thiee others may occur. 



KEY TO INDIANA Kl'ECJES OF RHIPIPHOBUS. 



II. Front coxii> not separated by the ])rosternuni. 



I). Front tarsi of male spinnJose beneath; elytra very acute. 



c. I'.asal lobe of thorax with a strong elevation ; male elytra wholly 

 yi'llow. the abdomen black; female elytra yellow, tipped with 

 black, abdomen red. flavipennis. 



CI-, r.asal lobe of thorax transversely notched at tip; elytra of male 

 yellow with black margins and tips; of female yellow with apical 

 third l)lack. 25ol. dimioiatus. 



hi). Frsmt eoxce of male with three .joints pubescent beneath. 



<l. Second .ioint of hind tarsi shorter than third and flat above. 



c. I'.asal lobe of thorax with an obtuse elevation and a deeji pit 



each side: elytra brownish-black at Itase. iukoveati s. 



('('. I'.asal lobe of thorax nut elevated, its surface regularly convex; 



punctures of metasternum separated by at least their own 



diameters; color variable. 2532. pectinatvs. 



(hi. Secoud joint of hind tarsi longer than third, subcylindrical ; lobe 



of thorax neither carinate nor notched. 2r):>;?. cruentus. 



(iti. Front cox;e separated in nearly their entii'e length by the slender process 



of prosternum. 



/. Second joint of hind tarsi longer than half the third and not flattened 



above; piceous, iridescent. linearis. 



//'. Second joint of hind tarsi shorter than half the third and flattened; 



bead and thoi'ax reddish-yellow, tlie Latter with Idack oval spot. 



25?>4. MMBATIS. 



2^)PA (S174). RiiiPTPHORi'S DIM iiiiATis Fall., Spec. Ins.. I. 17S1. ."..".2. 



I'.lack ; elytra pale yellow with ti]is ,and sometimes the outer and su- 

 tural margins black in male: apical third black In female; antenna' of male 

 pale yellow: of female piceous. the two b.asal joints reddish. Thorax with- 

 out ai)ical imi)resslon. the hind lobe emarginate; surface coarsely and dense- 

 ly punctate; elytra flat, sjiarsely |)unctured. rapidly narrower and very 

 acute at ti]). Length .^i-'.i mm. 



Vigo, Knox and Gribson counties; scarce. July 10- August 11. 

 Occurs especially on the flowers of the narrow-leaved mountain 

 mint, Pjicnantheniuin liiiif 'ilium Piirsh. The male is evidently rare, 

 as but one of the ten s])eciinens at hand is of that sex. 



2.").'>2 (8177). Rhipiphorus PKcriNATrs Fab.. Syst. Knt.. 17;iS, 2(;:>. 



Color exceedingly varialde. r.anging fi-oiii body entirely black, except 

 a reddish abdomen, to lil.ack with tliorax and elytra reddish-yellow; an- 

 teniue of male usually reddish with the branches black; those of female 

 black with two basal joints redcFish. Structural characters as given in key. 

 Length 4-7.5 mm. 



