488 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.58 



6. Ovipositor very short, hardly exserted ; propodeum with a very large, 



almost quadrate areola, and with strong costulae arising at the base of 

 the areola; apical lateral areas of the propodeum very large, perfectly 

 smooth and highly polished within ; legs pale testaceous, including the 



fore and middle coxae; a very small species 5. aletiae Riley. 



Ovipositor at least nearly half as long as the abdomen ; propodeum 

 Ui^ver with a quadrate areola, uhv with the costulae arising at the base 

 of the areola ; at least not combining all the characters not(Kl above 7. 



7. Thorax, abdomen and legs honey-yellow or reddish-testaceous 8. 



Thorax always black; abdomen mostly or entirely black 9. 



8. Length 4 mm.; wings dark fuliginous 6. nigriceps (Ashmead). 



Length 2.5 mm.; wings hyaline 7. imitator (Ashmead). 



9. Posterior polished area on the lateral face of the scutellum large, tri- 



angular in shape, and extending almost to the base of the scutellar disk; 



tegulae always yellowish or transparent-whitish 10. 



Posterior polished area on the lateral face of the scutellum much smaller, 

 usually semicircular in shape, and rarely extending half way toward 

 base of scutellar disk along the side of the latter, the roughened striate 

 area in front very large; tegulae variable in color 21. 



10. Second abdominal tei-gite uniformly roughened and opaque 19. 



Second abdominal tergite smooth and shining, at most with a few 



punctures , 11. 



11. All coxae and second and third abdominal tergites testaceous. 



8. cinctus (Provancher). 

 At least posterior coxae bhu-k; dorsum of the abdomen black 12. 



12. Nervellus straight, not curving at all toward base of wing; posterior femora 



black ; propodeal areola rather circular 9. laevicoxis, new species. 



Nervellus distinctly curving behind toward base of wing 13. 



13. First abdominal tergite smooth and shhiing, with only a median longi- 



tudinal depression on the apical half, and much broader at apex than at 

 base ; posterior femora testaceous ; malar space with a pale spot. 



10. disputahilis (Ashmead). 



First abdominal tergite usually distioctly punctate or rugulose; otherwise 



not combining all the above characters 14. 



14. Posterior femora testaceous in both sexes ; ovipositor sheaths longer than 



the abdomen ; lateral membranous margins along the first and second 

 abdominal tergites blackish 11. paranthrcnidis, new species. 



Posterior femora black or blackish in the male, and usually in the female; 

 when dark testaceous iu the female, then ovipositor slieaths are hardly 

 as long as the abdomen, and the membranous mai'gins along the apical 



half of the first abdomnal tergite are testaceous 15. 



15. First abdominal tergite opaque, rugose; disk of scutellum very flat and 

 wholly impunctate 16. 



First abdominal tergite strongly shining, and only punctate or indistinctly 

 roughened ; disk of scutellum with some punctures along the sides 17. 



16. First abdominal tergite very slender, parallel-sided 12. cpinoliac Viereck. 



First abdominal tergite broad, trapezoidal 13. balthazari (Ashmead). 



17. Ovipositor sheaths projecting hardly half the length of the abdomen ; first 



abdominal tergite very slender, at least twice as long as broad at apex, 

 and indistinctly punctate, the lateral membranous margins blackish. 



14. Icucostigmus (Aslimead). 



Ovipositor sheaths at least almost as long as the abdomen ; otherwise not 



combining all the characters noted above 18. 



