456 ARKIV FÖR ZOOLOGI. BAND 1. 



The wings are by both sexes hyaline with a brownish 

 yellow tinge. A little grayish at the ends. The legs are 

 red brown with the tibise and tarsi blackish. 



The description above diiFers from that of B. dubins pu- 

 blished by Kohl by wanting of straw-coloured bands on the 

 clypeus by the female. From B. G-nerini the specimens 

 differ by having the tibise and the tarsi blackish. Concern- 

 ing the pnre morphological characteristics they are mostly 

 agreeing with that of B. dubius Kohl. From B. Gnerini the 

 specimens differ by a petiole of an eqnal thickness as by B. 

 saevus Sauss. 



The fonrth cnbital cell nearly twice as large as the third 

 one. The third cnbital cell a little broader at the base than 

 high. By two smaller specimens this cell is a little higher 

 than broad as by B. dnbius. 



Length: o* 24,5 — 25,5 mm.; $ 28,5 — 30,5 mm. 



Exp.: rf 4(> mm.; £ 48 mm. 



4 sp., oV, Itoki ( 30 /i 1891); (\ sp., $9, Bonge; 3 sp., Ek- 

 nndu ( 22 - 29 /i2 1890). 



Geographical Distribution. — East-Africa: Dar-es-Salam. 



Polybia Lep. 



Lepeletier, Hist. nat. Ins. Hymén. I, 1836. 



P. tabida Fabr. 



Nnmerons females from Itoki and Kitta. 



Geographical distribution. — Before fonnd in the Cameroons 

 and on several other localities in West-Africa. 



Polis tes Latr. 



Latreille, Hist. nat. Crust. & Ins. III, 1802. 



P. inornatus Tullgr. n. sp. (Pl. 25, fig. 15 a, b.) 

 A single female from the Cameroons. 



