524 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1910. 



sites of Synagris also exist, and one may expect to ascertain very 

 interesting facts regarding their life history. It would be desirable 

 to extend the study, which is scarcely more than begun, as well as 

 to confirm the history of the different species of these solitary wasps. 

 The brief researches which I was able to make during my stay in the 

 Conge lead me to hope for considerable discoveries in the future in 

 connection with this subject. I shall be happy to have turned in this 

 direction the efforts of African naturalists. 



BIBLIOGRAPHY. 



Andre, E. Sur quelques Vespides africaius nouveaux ou peu comma. Revue 



d'Entomologie, Vol. 14, 1895, p. 352. 

 Bouvier, E. L. Les habitudes des Brmhcx ( monographie biologique). Annee 



Psychologique, 1900. 

 P.uysson, R. du. Monographie des Guepes ou Vesya. Bull. Soc. eutom. de 



France, Vol. 72, 1903. 

 Id. Hyrnenopteres nouveaux. Revue d'Entomologie, 1909, pp. 207-219. 

 Dalla Torre, C. G. de. Catalogus Hymenopterorran, Vol. 9. 

 Fabre, J. H. Nouveaux souvenirs entomologiques, 2 e serie, Paris, 1SS2. 

 Ferton, Ch. Notes detachees sur rinstim-t des Hyrnenopteres ruelliferes et 



ravisseurs, l re serie. Ann. Soc. entoru. France, Vol. 70, 1901. 

 Id. Notes detachees sur 1'instinct des Hyrnenopteres ruelliferes et ravisseurs, 



2 e serie. Ann. Soe. entom. France, Vol. 71, 1902. 

 Latreille. Hist, naturelle crust, et insectes. 1802, Vol. 3. 

 Maindron, M. Moniteur du Senegal et Dependances, April 15. 1879. 

 Marchal, P. Observations sur les Polistcs. Bull. Soc. zool. France, Vol. 21, 



pp. 15-21, 189G. 

 Roubaud, E. Recherches sur la Biologie des Guepes solitaires d'Afrique du 



genre Synagris. Comptes rendus de l'Academie des Sciences, No. 16. 190S, 



p. 696. 

 Saussure, H. de. Melanges hymenopterlogiques. Mem. Soc. Phys. et Hist. 



nat. Geneve, Vol. 17, 1S63. 

 Id. Etude Fam. Vespides, I, Eumenides, 1852. 



EXPLANATION OF PLATES. 

 Plate 1. 



Fig. 1. Nest of Synagris sicheliana Sauss. A nest of five cells. Brazzaville. 

 E. Roubaud. 

 2. Nest of S. calida L. Mozambique, Guengere. G. Vasse, 1906, Museum of 

 Paris. 



3. Nest of S. sicheliana Sauss. A nest of three cells. Brazzaville. E. 



Roubaud. 



4. Nest of S. calida L. French Congo, Fort Sibut, Krebedje. A. Chevalier, 



Mission Chari-Tchad, Museum of Paris. 



Plate 2. 



Associated nests of S. sicheliana Sauss. Three nests. Brazzaville. E. Roubaud 

 and A- Weiss. 



