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 l^egun, 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 

 Congo 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 qnelques Vespides africains nouveaiix on pen connns. Revue 



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

 RouviER, E. L. Les habitudes des Bembcx (monogi'apliie biologiqne). Ann^e 



Psycbologiqne, 1900. 

 P.UYSSON, R. Du. Monograpbie des Gnepes on Vcspa, Bull. Soc. entoni. de 



France, Vol. 72, 1903. 

 7(7. Hymeuopteres nonveanx. Revue d'Eutomologie, 1909, pp. 207-219. 

 Dalla Torke, C. G. de. Catalogns Hymenoptevoruni, Vol. 9. 

 Fabre, J. H. Nonveanx souvenirs entomologiques, 2" serie, Paris, 1882. 

 Ferton, Ch. Notes detacbees sur Tinstinct des Hymeuopteres melliferes et 



ravisseurs, 1" serie. Ann. Soc. entom. France, Vol. 70, 1901. 

 Id. Notes detacbees sur I'instinct des Hymenopteres melliferes et ravisseurs, 



2® serie. Ann. Soc. 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 Polistes. Bull. Soc. zool. France, Vol. 21, 



pp. 15-21, 1896. 

 RotjBaud, E. Recbercbes sur la Biologie des Gnepes solitaires d'Afrique du 



genre i^ynagris. Comptes rendus de FAcademie des Sciences, No. IG. 1008, 



p. 696. 

 Saussure, H. de. Melanges bymenopterlogiqnes. Mem. Soc. Pbys. et Hist. 



uat. Geneve, Vol. 17, 1863. 

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



EXPLANATION OF PLATES. 

 Plate 1. 



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

 E. Rouband. 

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

 Paris. 



3. Nest of 8. sicheliana Sauss. A nest of tbree cells. Brazzaville. E. 



Rouband. 



4. Nest of 8. calida L. Frencb Congo, Fort Sibut, Krebedje. A. Cbevalier, 



Mission Cbari-Tcbad, ]Mnseum of Paris. 



Plate 2. 



Associated nests of 8. sicheliana 8auss. Tbree nests. Brazzaville. E. Rouband 

 and A. Weiss. 



