290 Mr. R. E. Turner on Fossorial Hymenoptera. 



Apical half or less of the second dorsal seg- 

 ment yellow 2. 



2. Mesonoturn with yellow hands A. nyasicus, Turn. 



Mesonotum without yellow hands 3. 



3. Third dorsal segment with a yellow apical 



band A. effugiens, Brauns. 



Third dorsal segment without yellow markings . A. fugax, Turn. 



Fam. Bethylid.se. 



The African genera closely allied to Pristocera may be 

 divided as follows : — 



1. Apical ventral segment divided from base to 



apex . . 2. 



Apical ventral segment not divided, prouotum 

 strongly depressed transversely close to the 

 posterior margin Pristocera, King. 



2. Pronotum strongly transversely depressed close 



to the posterior margin ; head unarmed .... Mangesia, Kieff. 



Pronotum not depressed transversely 3. 



3. Cheeks armed with a strong spine Xomineia. Kieff. 



Cheeks unarmed Kathepyris, Kieff. 



These genera are very close to each other, and perhaps 

 would have been better left as one genus till the females are 

 better known. The depressed transverse groove near the 

 apex of the pronotum is common to Pristocera and Mangesia, 

 but the female of the latter differs from Pristocera in the 

 structure of the median segment. The development of the 

 neuration in all the genera seems to vary considerably, also 

 the position of the first recurrent nervure. 



In my keys to the species I only include those which 

 I have seen. 



Key to the Species of Mangesia. 



1. Head strongly tuberculate at the posterior 



angles beneath M. tuber culata, Turn. 



Head not tuberculate 2. 



2. First recurrent nervure well-defined .... 3. 

 First recurrent nervure only faintly indi- 

 cated 4. 



3. Entirely black, wings dark fusco-hyaline . M. brevicornis, Turn. 

 Head and dorsal surface of the thorax red, 



wings fusco-violaceous M. atopogamia, Turn. 



4. Antennae orange M. subviolacea, Enderl. 



Antennae black or fusco-ferruginous .... 5. 



5. Black, the mandibles only fusco-ferrugi- 



nous 6. 



Antenna? fusco-ferruginous, four apical 

 abdominal segments ferruginous red . . M. rujieaudata, Westw. 



6. Space between second and third mandi- 



bular teeth uiuch greater than between 



the others, antenna? slender at apex . . M. communis, Turn. 



