22 Journal of the Asiatic Society of Bengal. [N.S., XVIII, 
himself thought it an Aculeate closely related to the Scoliidae. 
In 1917 Turner and Waterson! added the genus Olixon 
Cameron, which had been placed by its author in the Braco- 
nidae to the family, and remarked that the genitalia showed a 
very close relationship to that of the Eumenidae and was 
male and female prove), in certain respects related to both the 
Fossores and the Diploptera. But even if we grant this we 
can do little more than say with that great hymenopterist, 
Frederick Smith :—‘“ Place Sibyllina (= Rhopalosoma) in any 
group of the Hymenoptera and it will as it were stand alone ; 
it has little affinity that I can discover, certainly it has no 
I 
The Rhopalosomidae is widely distributed and consists at 
present of two genera : Rhopalosoma , of which two species are 
known, ¢.g., R. poeyi from Cuba and R. abnormis from Calcutta 
and Ceylon ; and Olizon, the type of which is O. testaceum 
Cam., from Panama. Judging from the description and 
Cameron’s figure this species seems to be abundantly different 
from Rhopalosoma. 
Family Eumenras. 
About 80 new species and a new genus have been de- 
scribed since 1897. Meade-Waldo’s papers on Oriental forms 
will be found in Ann. Mag. Nat. Hist., 1910-14. The other 
papers are scattered and Mr. Aiyar’s catalogue should be 
consulted, magnificent monograph of the Kumenidae and 
by Dr. J. Bequaert in Bull. Amer. Mus. Nat. Hist. XXXIX, 
1918. This paper contains a classification of the diplopterous 
wasps with notes on specific characters and a list of Ethiopian 
species. Some notes on Indian species are given, the generic 
name of his Icaria been changed to Ropalidia, and Rhyn- 
chium is sunk as a subgenus of Odynerus. 
Family VEsprpag. 
More than 30 new species have been added to the Oriental 
fauna. Du Buysson monographs the family in Ann. Soc. Ent. 
France, 1904. The genera and Species are listed in Genera 

' Ann. Mag. Nat. Hist. XX, p, 101, 1917. 
