1366 FAMILY LXV. — RHrPIPHOEID.E. 



rated along the suture; tarsal (.'laAvs bifid at tip. The larvaj are 

 parasitic on the young ol' wasps. Four of tlie eight recognized spe- 

 cies have been taken in Indiana, while three others may occur. 



KEY TO INDIANA SPECIES OF KHIPIPHOEUS. 



o. Front coxiv not sepiii-ated liy the pi-osternum. 



h. Front tarsi of in;Ue spinulose beneath ; elyti'a very acute. 



.'. Basal lobe of thorax with a strong elevation ; male elytra wholly 

 yellow, the abdomen black; female elytra yellow, tipped with 

 black, abdomen red. flavipennis. 



<-i: Basal lobe of thorax transversely notched at tip; elytra of male 

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

 third black. 2531. DiMiniATU.s. 



Jih. Front (/oxie of male with three .joints pubescent beneath. 



(/. Second .ioint of hind tarsi shorter than third and flat above. 



r. Basal lobe of thorax with an olitnse elevation and a deep pit 



each side; elytra brownish-black at l)ase. bifoveatus. 



fc. Basal lobe of thorax not elevated, its surface regularly convex ; 



jiunctures of metasternum seiiarated liy at least their own 



diameters ; color variable. 2532. pectinatus, 



(111. Se<'nnd joint of hind tarsi longer than third, siibcylindrical ; lobe 



of thorax neither carinate nor notched. 2."i.j:i. cRrExxus. 



iia. Front coxip separated in nearly their entire length liy the slender process 



of prosternum. 



/. Second joint of hind tarsi longer than half the third and^iot flattened 



above; picoous, iridescent. linearis. 



ff. Second joint of hind tarsi shorter than half tlie third and flattened ; 



head and thorax reddish-yellow, the latter with lilack oval spot. 



2534. LIMR.\.TUS. 



2.":!1 (S174). Rhipiphorus di.midiatus Fab., Spec. Ins., I, 17S1. H^^^2. 



Black; elytra pale yellow with tips and sometimes the outer and su- 

 tnral margins black in male; apical third black in female; antenn.^i of male 

 jiale yellow; of female piceons, the two basal joints reddish. Tliorax with- 

 out apical impression, the hind lobe emargiuate; surface coarsely and dense- 

 ly punctate; elytra flat, sparsely punctured, rapidly narrower and very 

 acute at tip. Length 5-9 mm. 



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

 Occurs especially on the flowers of the narrow-leaved mountain 

 mint, Pijcnaiithcinum liiiifoJiiim Pursh. The male is evidently rare, 

 as but one of the ten specimens at hand is of that sex. 



2.5.12 (8177). KinriPHORiis pectinatcs Fall.. Syst. Knt., 17!)S. 2(;.">. 



Color exceedingly variable, ranging from body entirely l)lack, except 

 a reddish abdomen, to black with thorax and cl,\'tra reddish-yellow; an- 

 tenna! of male usually i-(Mldisb wltli the branches l>lack: those of female 

 black witli two basal joints reddish. Structural characters as given in key. 

 Length 4-7.5 mm. 



