144 E. T. CRESSON. 



PIMPLA, Fabr. 

 The species of this j^eniis, as far as known to me, may be dis- 

 tinguished by the characters given in the following table. 



Body black. 



Legs black, anterior pair pale in front; scutellutn white 1. maura, n. sp. 



Legs yellowish-red, posterior pair varieilwith black and white. 



Coxae black 2. atrocoxalis, u. sp. 



Coxae yellowish-red. 



Posterior tibiae and tarsi entirely black or fuscous. 



Wings hyaline ; abdomen sparsely punctured .T. pedalis, Cress. 



Wings fuliginous ; abdomen finely granulated 4. texana, n. sp. 



Posterior tibiae black, annulated with white. 

 Posterior tarsi entirely black or fuscous. 

 Scutellum black, tegulae and anterior coxte black..5. tenuicornis, Cress. 

 Scutellum black, tegulse white, anterior coxae 



yellowish-red 6. annulipes, Brulle. 



Scutellum white 7. aquilonia, n. sp. 



Posterior tarsi %vith basal half of first joint only, white. 

 Posterior tibiae black, with a white annulus near base. 

 Antennae black above, fuscous beneath ; mesothorax entirely 



black; tip only of scutellum white 8. Ontario, n. sp. 



Antennae fuscous above, pale luteous beneath with black incisures ; 

 mesothorax with two short discal white lines : scutellum 



white 9. picticomis, n. sp. 



Posterior tibiae with narrow annulus at base and stripe beneath, 



reaching to apical third, white 10. novita. n. sp. 



Posterior tarsi with two basal joints white tipped with black, scape 



white; size small, slender 11. indagatrix, Walsh. 



Posterior tarsi white, the joints tipped with black. 



Antennae pale luteous, incisures black 12. annulicornis, Walsh. 



Antennae unicolorous, brown or ferruginous. 

 Abdominal segments with narrow white 



apical margins 1?>. conquisitor, Say. 



Abdominal segments entirely black. 



Areolet of anterior wing incomplete l-J. incompleta, n. sp. 



Areolet of anterior wing complete. 

 Head entirely black ( 9 )» face white 



{%); tegulae white 15. inquisitor, Say. 



Clypeus only, scape beneath, tegulae and most of four ante- 

 rior legs white {%) 16. alboricta, n. sp. 



Clypeus, more or less, anterior orbits, tegulae, line before, and 

 tip of scutellums, wjiitej pleura more or less red. 

 Pleura almost entirely red ; two dots below insertion of an- 

 tennae, clypeus entirely and dot on each side of metatho- 



rax behind, white 17. rufopectus, n. sp. 



Pleura red only before middle coxae; tip of clypeus more or 

 less blackish; no white dots below insertion of antennae; 

 metathorax immaculate 18. scriptifrons, Walsh, 



