60 OENEKA OF HYMENOITERA. 



Posti-rior tihiiv and tin-si robust, the tibin' scarcely loiijter than tho femora ; 

 antvnni« rohuHt, aliout as long as head and thorax ; first su)>niar);ina1 



cell receiving only one recurrent nervure ActPliitiiM Latr. 



4.— Mewithorax transversely rugose; anterior tarsi more than twice longer than 



their tihiie 5. 



Mesothorax not transversely rugose ; anterior tarsi not twice as long an their 



tibiw <j. 



5. — Posterior coxie as usual, robust, swollen towards biuse ; abdomen minutely 

 transvei-sely aciculate, that of % convex above, with sub»iuadrate seg- 

 ments, not eniarginate at apex or channeled RhysNtt (Jrav. 



Posterior cone long, cylindrical; al)domen smooth and shining, that of % 

 long, narrow and flat above, the segments very much longer than wide, 

 with 3-7 above more or less grooved longitudinally and eniarginate at 



apex TlialeHsa llolmgr. 



H. — Abdominal segments 2 and following with the surface above uneven, due to 

 tubercles or depressions or both (except in Therouia where the surface 



is almost even and the body yellow) 7. 



Abdominal segments 2 and following smooth and even 14. 



7. — Intermediate segments of the abdomen (at least of % ) longer i broad, 



rarely quadrate 8. 



Intermediate segments of the abdomen broader than long 9. 



8. — Areolet triangular; ovipositor as long or longer than the abd<»inen. 



Tarsi with the last joint not more than twice longer than the penultimate : 

 ujiper nervure of third discoidal cell not at all or but slightly arched, so 

 that the cell receives theexterno-medial nervure at its upper basal angle. 



Ephialte!>i (xrav. 

 Tarsi w'ith the la.st joint three or more times longer than the penultimate ; 

 upper nervure of third discoidal cell abruptly bent near the base, so 

 that the cell receives the externo-medial nei"vure at its l)asal middle. 



PerithouN Holmgr. 



Areolet wanting ; ovipositor about half the length of the abdomen ; L'ves and 



ocelli very large and prominent, the former occupying the entire sides 



of the head ; face narrow and depressed ; prothorax mu<-h narrowed in 



front in the form of a neck; tarsal claws deeply cleft, the pulvillus very 



large .\ EpJineciM Hrulle. 



9. — Anterior femora entire beneath 10. 



Anterior femora beneath distinctly eniarginate in 9 • slight!,, so in % , their 



tibiffi subarcuate or curved -Colpoineria Holmgr. 



10.— Ovipositor arising from a ventral cleft 11. 



Ovipositor arising from the apex of the abdomen, the lest ventral segment 



reaching that far. 12. 



11. -Areolet triangular. 



Abdomen smooth and shining, impunctured ; posterior femora robust ; 



color of body yellow Theroiiia Holmgr. 



. Abdomen more or less punctured; color of body black, generally with 



pale markings Pimpla Fabr. 



Areolet incomplete or wanting. 

 Femora slender, not thickened; clypeus separated. 



Polysphincta Grav. 

 Femora thickened ; clyjieus not sejiarated ^ichizopyga Grav. 



