10 Journal New York Entomological Society. t VoL xxvu. 



Head but little longer than wide ; eye removed from posterior margin of 

 head by about its greatest length or less 3 



3. Ovipositor longitudinally aciculate, penultimate joint of antennae quadrate. 4 

 Ovipositor with scattered, elongate punctures; penultimate joint of an- 

 tennae twice as long as thick similis n. sp. 



4. Antennae pale at base ; median stria at base of second abdominal segment 



much longer than the lateral ones quadriceps Ashm. 



Antennae black or piceous throughout ; striae of second abdominal segment 

 nearly equal in length f emoratus Ashm. 



5. Males 6 



Females 19 



6. Some of the basal joints of antennae with a linear process or tooth near 



the middle of the external side 7 



All joints of antennae simple, without any projections or processes ... 15 



7. First flagellar joint simple, cylindrical, second and several following joints 



with a process, legs honey-yellow 8 



First flagellar joint as well as some of the following ones with a process. 9 



8. Antennal flagellum black, eighth joint with a small, but distinct process; 



larger, western species 6 mm. (Fig. 12.) placidus Brues. 



Antennal flagellum brown, no process on eighth joint; smaller, eastern 

 species f uscinornis n. sp. 



9. Antennal flagellum black 10 



Antennal flagellum yellow at base, fuscous apically, eastern species. 



ashmeadi n. sp. 



10. Head decidedly less than twice as broad as thick when seen above ... 11 

 Head approximately twice as broad as long 14 



1 1. Median carina of propodeum complete 12 



Median carina of propodeum not extending to apex ; processes on basal 



flagellum joints acute, dentiform dentaticornis Kieff. 



12. Propodeum with a smooth space on each side of the median carina at 



base 13 



Propodeum without smooth spaces crenaticornis Kieff. 



13. First four flagellar joints with a process externally; fifth with a less dis- 



tinct one fallacicornis Kieff. 



First six flagellar joints with a process, seventh with a faint trace of one. 



Obscuripes Brues. 



14. Only the first five flagellar joints with a carinate process externally; malar 



furrow deeply impressed ; mesopleura irregularly striate anteriorly. 



pleuralis n. sp. 

 Seven or eight flagellar joints toothed or with processes ; mesopleura en- 

 tirely smooth and polished. (Fig. 16.) serricornis Brues. 



15. Head approximately twice as broad as long when seen from above ... 16 

 Head decidedly less than twice as broad as long, strongly narrowed behind 



the eyes 18 



16. Petiole of abdomen long, twice as long as broad; antennae yellow. 



longiceps Ashm. 



