129 



individual reared under artificial conditions from a G. brevipalpis pupa, 

 development occupied nearly 12J weeks, while in that of other specimens 

 the developmental period was extended to 17 weeks. The numbers 

 of M. glossinae and other parasites emerging from pupae increase 

 rapidly in the dry season ; out of 762 pupae obtained from natural 

 breeding places between 22nd August and 16th October, 97 flies and 

 -131 Mutillids emerged. From 368 pupae collected within the pro- 

 claimed area, however, only two parasites, a Mutillid and a Bombyliid, 

 were reared. A new species of Mutillid parasite, M . benefactrix, Turn., 

 was obtained from pupae collected at Monkey Bay. This species 

 exhibited greater activity than M. glossinae, and differed in the method 

 of pairing. 



Fig. 16. Mutilla benefactrix, Turner, 3. (After Turner, 149.) 



xperimental evidence showed that the Chalcid, Syntomosphyrum 

 glossinae, Wtst., is hyperparasitic on M. glossinae, which may be 

 attacked in both larval and pupal stages. About 3 per cent, of the 

 pupa cases of M. glossinae examined between 7th April and 2nd June 

 showed evidence of parasitism, while between 22nd August and 16th 

 October less than 1 per cent, were parasitised. Another parasitic 

 Hymenopteron, Eupelminus tarsatus, Wtst., also regarded by Lamborn 

 as a hyperparasite of M. glossinae, though there are grounds for con- 

 , sidering it to be more probably a primary parasite, was obtained from 



(5979) I 



