Species of Fossorial Hymenoptera from Africa. 725 



forewing continued beyond the 



cells, almost reaching the margin. 5. 



3. Basal abdominal segment nodose, 



longer than broad M. stoalei, Turn. 



Basal abdominal segment not no- 

 dose, as broad as long ... 4. 



4. Antennae stout, thickened to the 



apex ; third cubital cell as long 

 as the second on the radius . . M. brannsi. Turn. 

 Antennae slender, not thickened to 

 the apex ; third cubital cell very 

 short, not more than half as long 

 as the second on the radius . . M. dijfirt,is. Turn. 



5. Entirely black M. khigii, Westw. 



Abdomen and pronotum more or 



less banded with yellow ... 6. 



6. The yellow bands on the abdomen 



emarginate or interrupted on 



each side 7. 



The yellow bands on the abdomen 

 entire, not emarginate or inter- 

 rupted laterally 16. 



7. Basal abdominal segment at least 



red 8. 



Basal abdominal segment black . 10. 



8. Basal abdominal segment only red . M. ntfiiiodis. Turn. 

 Two basal abdominal segments red. 9. 



9. Yellow abdominal bands emarginate 



laterally; median segment smooth 



posteriorly M. rufonigra, Bingh. 



Yellow abdominal bands interrupted 

 laterally ; median segment punc- 

 tured-rugose throughout . . . M. consanfjuinea^ Turn.. 



10. Posterior margin of the pronotum 



without a yellow band . . . M. kristenseni, Turn. 

 Posterior margin of the pronotum 



with a yellow band .... 11. 



11. Anterior margin of the pronotum 



without a yellow band ; basal 



abdominal segment globular. . M. constrictiventris, Turn 

 Anterior and posterior margins of 

 the pronotum, both banded with 

 yellow ; basal abdominal segment 



not globular 12. 



3C2 



