128 



In a subsequent paper (84) the same author gives further details of 

 his observations upon Hymenopterous parasites of G. morsitans in 

 Nyasaland. Mutilla glossinae, Turn., was reared in large numbers 

 from pupae of the latter species obtained near Monkey Bay. " The 

 act of parasitism/' writes Dr. Lamborn, " has already been described 

 in a previous report [vide supra, p. 125], and to my account I should add 

 that in most cases, when the pupa attacked has been on the surface 

 of the ground, the female is at particular pains to cover it with soil 

 subsequent to oviposition, collecting earth together with its fore-limbs 

 from various points, after the manner of a Bembex closing its burrow, 

 and shovelling it back over the pupa with its hind limbs. 



Fig. 15. Mutilla [benefactrix, Q, parasitic in the larval stage in pupae of 

 Glossina morsitans, in Nyasaland. (After Turner 1 , 149.) 



" The site for puncture is invariably about midway between the two 

 poles of the pupa. The delicacy with which the operation is effected 

 seems to vary considerably, so that though in some cases the site is 

 readily found on examination with a lens and may be marked with a 

 little shining sticky patch to which a few grains of earth sometimes 

 adhere, in others no sign of it can be detected." 



Dr. Lamborn states that he has obtained " indisputable evidence " 

 that M. glossinae is a primary parasite, depositing eggs in Glossina 

 pupae at varying stages of development, especially, he believes, the 

 later ones. No indications that G. brevipalpis is attacked by this 

 species of Mutilla under natural conditions were observed. The dura- 

 tion of the life-cycle within the Tsetse-fly pupa varies very considerably, 

 and may be influenced by climatic changes. In the case of one 



