1366 



FAMILY LXV. RHIPIPHORID^. 



rated along the suture; tarsal elaws bifid at tip. The larva; are 

 Parasitic 011 the young of wasps. Four of the eight recognized spe- 

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



KEY TO INDIANA SPECIES OF EHIPIPHOKLS. 



fl. Front coxw not separated by the presternum. 



''• Pront tarsi of male spinulose beneath : elytra very acute 



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

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

 black, abdomen red. 

 r.r. T 1 i n , flavipexxis. 



cc. Basa lobe of thorax transversely notched at tip: elytra of male 

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

 third black. _ _, 1 



bb. front coxae of male with three joints pubescent beneath 



<f. Second joint of hind tarsi shorter than third and flat above 



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

 each side: elytra brownish-black at base. bieoveattis 

 ce. Basal lobe of thorax not elevated, its surface regularly convex • 

 punctures of metasternum separated by at least their own 

 diameters : color variable. 2532 fectinatus 



Second joint of hind tarsi longer than third, subcylindrical ; lobe 

 of thorax neither carinate nor notched. 9533 cbtjentus 



aa. Front coxae separated in nearly their entire length by the slender process 

 of prosternum. 



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



above; piceous, iridescent. 

 ff. Second joint of hind tarsi shorter than half the third and fl^utened- 

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



2534. L1MBATUS. 



2531 (8174). Rhipiphobus dimidiatus Fab.. Spec. Ins.. I. 1781 332 



rnrif^f ■ el '; t 1 1 ' a i Pale yellow with ^ and sometimes the outer and su- 

 tu al margins black in male: apical third black in female: antennae of male 

 pale yellow: of female piceous, the two basal joints reddish. Thorax with- 

 out apical impression, the hind lobe emarginate : surface coarsely and dense- 



Z^TtU 1 T^l^; PmiCtUred - 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 Pycnanthemum Unifolium Pursh. The male is evidently rare 

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



2532 (8177). Rhipiphobus pectinatus Fab.. Syst. Ent.. 1798. 263. 



Color exceedingly variable, ranging from body entirely black, except 

 a reddish abdomen. .to black with thorax and elytra reddish-yellow an- 

 tenna* ot male usually reddish with the branches black; those of female 

 clack with two basal joints reddish. Structural characters as given in key 

 Length 4-7.5 mm. 



