50 GENERA OF HYMENOPTERA. 



Posterior tibia' ami tarsi robust, the tibise scarcely loiijier than tlie femora : 

 anteuuiK robust, about as long as head and thorax; first sul>mar<iinal 



cell receiving only one recurrent nervure AosviiitiiM Latr. 



4. — Me.sothorax trausvereely rugose; anterior tarsi more than twice longer than 



their tibite 5. 



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



tibiiie <>. 



5. — Posterior coxa' as usual, robust, swollen towards base ; al)donien minutely 

 transversely aciculate, that of % convex above, with subcjuadrate seg- 

 ments, not emarginate at apex or channeled RIi.V!>»Na (irav. 



Posterior coxse long, cylindrical; abdomen smooth and shining, that of % 

 long, narrow and flat above, the segnients very much longer llian wide. 

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



apex TlialoMsa Holmgr. 



().— Abdominal segment>s 2 and following with the surface above uneven, due to 

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



is almost even and the body yellow) 7. 



Abdominal segments 2 and following smooth and even 11. 



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



rarely quadrate 8. 



Intermediate segments of the abdomen broader than long 9. 



8. — Areolet triangular; ovipositor as long or longer than the abdomen. 



Tarsi with the last joint not more than twice longer than the i)enultimate : 

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

 that the cell receives the externo-medial nervure at its ui>|ier basal angle. 



Kphialtos (irav. 

 Tarsi with the last 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 nervure at its basal middle. 



IVi'iflKiiiM Holmgr. 



Areolet wanting; ovipositor about half the length of the abdomen ; eyes and 



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



of the head ; face narrow and depressed ; prothorax much narrowed in 



front in the form of a neck ; tarsal claws deei)ly cleft, the ))ul villus very 



large Epinioi-iw Hrnlle. 



9.— Anterior femora entire beneath 10. 



Anterior femora beneath distinctly emarginate in 9- slightly so in % , their 



tibiie .sul)arcuate or curved '^C<>l|>oiiiei'ia Holmgr. 



10. — Ovipositor arising from a ventral cleft 11. 



Ovijiositor arising from tlie apex of the abdomen, tiie lest ventral segment 



reaching that far 12. 



11. Areolet triangular. 



Abdomen smf)oth and shining, impunctured; posicrior femora robust: 



color of body yellow Tln'roiiia Holmgr. 



Abdomen more or less jmnctured ; enlor of Imdy bhuk. generall.\- with 



pale markings I*iiii|»lsi l"al)r. 



Areolet incomplete or wanting. 



Femora slender, not thickened; clyijeus separated. 



l*4»l,VS|>liiii<-fa (hav. 

 Femora thickened; clyixus not separated .Sclii/.op.v^a (irav. 



