No. III.— HYMENOPTERA, DIPLOPTERA. 



By Geopkkey Meade-Waldo, B.A. 

 (Communicated by Professor J. Stanley Gardiner, M.A., F.R.S., F.L.S.) 



Read 15th June, 1911. 



Fain. Eumenidse, Westw. 

 Eumenes, Fabr. 



1. Eumenes alluaudi Pdrez, Ann. See. Ent. France, Ixiv, p. 206 (1895); Cameron, 

 Trans. Linn. Soc. London, ser. 2, ZooL, xii, p. 71 (1907). 



Seychelles. Mahe, Praslln (1905) ; Mahe, Silhouette, Dennis Island, Praslin (1908—9) ; 

 also mud cells. 



This insect very often makes its cells in rooms : it was not observed in the highest 

 forests. 



Odynerus, Latr. Subgenus Leionotus, Sauss. 



2. Odynerus trilohus (Fabr.); Lepel., Hist. Nat. Ins. Hymen., ii, p. 635 (1841). 



Odynerus chagosensis Cameron, op. cit., p. 73. -^ * • 



Odynerus ccenocephalus Cameron, op. cit., p. 72. 



Odynerus chagosensis Cam. $ is a variety of 0. trilohus, viz. Var. B, Sauss., Etud. 

 Fam. Vespid. i, p. 186 (1852), recorded from Mauritius, with yellow markings on the 

 disc of the mesonotum ; the clypeus differs from that of typical O. trilohus in being 

 entirely yellow. Odynerus ccBnocephalus Cam. is typical 0. trilohus (Fabr.). 



Chagos Group: Salomon Atoll and Peros Banhos (1905). 



0. trilohus is a common and widely distributed species, and is known from Madagascar, 

 Mauritius, Reunion and S. Africa. The species has doubtless found its way to the majority 

 of the islands in the Indian Ocean. 



3. Odynerus farquharensis Cameron, op. cit., p. 74, ?. 



Type from Farquhar Atoll (1905) ; a large series of females and one male from Aldabra 

 (Fryer, 1908—9). 



4. Odynerus seychellensis Dalla Torre, Genera Insectorum, Fascic. 19, p. 54 (1904). 

 Odynerus cylindricus P<5rez (nee Saussure), Ann. Soc. Ent. France, Ixiv, p. 207 



(1895) ; Cameron, op. cit., p. 72. 



Amirantes : Desi-oches Island and Poivre Island (1905). 



Seychelles : Mah^, Silhouette, Praslin ; not from the high damp nu)untain-fbrest3 

 (Hugh Scott, 1908—9). 



Also Mauritius. 



6—2 



