SOLITARY WASPS OF GENUS SYNAGRIS ROUBAUD. 525 



Plate 3. 



Fig. 1. Nest of S. cornuta L. A nest of three cells, the binding cement of which 

 has been partially destroyed by commensals after completion. 



2. Initial cell of 8. cornuta L. Congo, forest of Ababouas, valley of the 



Roubi. Mission of Bonrg de Bozas, L. Didier, 1903. Museum of 

 Paris. 



3. Linear nest of four cells, of the same species. Brazzaville. E. Roubaud. 



4. Complete nest, with cells superimposed, of the same species. Brazza- 



ville. E. Roubaud. 



Plate 4. 



Fig. 1. Full-grown larva of 8. cornuta L. and its food-paste. X 5. 



2. Larva of Osprynchotus flavipes Brulle. X 5. 



3. Larva of the Chalcidid parasite of 8. cornuta L. 



4. Larva of 8. calida L. X 5. 



5. Egg of 8. calida. X 5, 



