Species of Fossorial Hymenopteo'a from Africa. 723 



Stigma situated at or beyond one- 

 third from the base of the fore- 

 wing ; second dorsal segment 

 without a white band. Wings 

 sometimes short, usually of 

 normal length 2. 



2. Second cubital cell absent .... 3. 

 Second cubital cell present ... 10. 



3. Third cubital cell absent, the neura- 



tion not extending beyond the 



stigma M. perniciosa. Turn. 



Third cubital cell present .... 4. 



4. Entirely black ; size 17 mm. or 



more, very robust 5. 



More or less marked with red or 

 ferruginous, smaller and less 

 robust 6. 



5. Forewing scarcely longer than the 



thorax and median segment com- 

 bined, mandibles with a tooth 

 bent sharply inwards close to 

 the apex; apical dorsal segment 



aciculate M. infradentata, Turn. 



Forewing as long as the head, 

 thorax and median segment com- 

 bined ; mandibles without a 

 tooth bent inwards ; apical dorsal 

 segment smooth M, khujii, Westw. 



6. Median segment with a median 



sulcus or carina 7. 



Median segment without a sulcus 



or carina 9. 



7. Head and pronotum red, abdomen 



black ; size about 15 mm. ; wings 



of normal length -8. 



Head and thorax ferruginous, ab- 

 domen ferruginous at the ba.=e 

 with white lateral spots ; size 

 about 10 mm. ; wings short . . 31. perornata, Turn. 



8. Legs red ; apical dorsal segment 



smooth M. seminifa, Gerst. 



Legs black; apical dorsal segment 



punctured-striate M. rufosplendida, Turn. 



9. Pronotum red M. sublevis, Turn. 



TRANS. ENT. SOC. LOND. 1912. — PART IV. (FEB.) 3C 



