126 THE ENTOMOLOGIST. 



(10) 11. Post-petiole decidedly shorter ; abdo- 

 men also shorter . . . .5. pallidus, Nees. 



12. Antennae with at most thirty joints. 



13. Stigma unicolorous, fiavidous or tes- 

 taceous. 



14. Face piceous or black ; legs often in- 

 fuscate ...... 6. tabidus, Wesm. 



15. Face testaceous or rufescent. 



16. Sternauli deep ; antennae of female 

 thirty-two jointed. 



17. Antennas infuscate or piceous . . 7. pallidipes, Wesm. 



18. Antennge flavidous or testaceous . 8. ictericus, Nees. 



19. Sternauli shallow ; antennae of female 

 twenty-seven jointed . . .9. confinis, Ruthe. 



20. Stigma piceous or infuscate, usually 

 paler basally. 



21. Legs broadly infuscate . . .6. tabidus, supra. 



22. Legs testaceous. 



23. Wings not clouded ; second cubital 

 cell not contracted towards radial 

 nervure. 



24. Wings not lacteous ; abdomen usually 

 pale-marked. 



25. Metathorax smooth . . . .10. vexator, Hal. 



26. Metathorax rugulose (not punctate). 



27. Head broader than thorax ; stigma 

 larger and darker . . . .11. obfiiscatus, Nees. 



28. Head not broader than thorax; stigma 

 smaller and paler . . .12. punctiventris, Euthe. 



29. Wings lacteous ; abdomen nearly to- 

 tally black 13. atrator, Curt. 



30. Wings clouded ; second cubital cell 

 distinctly contracted above. 



31. Second cubital cell strongly con- 

 tracted, subtriangular . . .14. albicornis, Ruthe. 



32. Second cubital cell less contracted, 

 trapeziform . . . . 15. abdominator, Nees. 



3 3 . Recurrent nervure emitted at or beyond 

 apex of first cubital cell. 



34. Length, 2f mm. ; terebra longer than 

 abdomen . . . . .16. jaculator, Hal. 



35. Larger ; terebra not longer than ab- 

 domen. 



36. Stigma piceous, sometimes externally 

 pale. 



37. Stigma unicolorous piceous . 17. mdanostictus, Cap. 



38. Stigma paler, with the outer border 

 stramineous . . . .18. pulchricornis, Wesm. 



39. Stigma pale, with the border some- 

 times darker. 



40. Terebra as long as the abdomen ; male 

 unknown . . . . .19. consors, Ruthe. 



