32 ROBERT NEWSTEAD — A REVISION OF THE TSETSE-FLIES (gLOSSINA), 



the morphological differences were found to exist. T am delighted therefore 

 to be able to refute the statement previously made by me (I.e.) and to express my 

 indebtedness to Mr. Austen for so generously placing the specimens at my disposal. 



Glossina morsitans, Westwood. 



Genital nrmatnre of the male (fig. 16). Superior claspers (sc) completely 

 united dorsally by a thin membrane which is thickly studded with minute spines ; 

 form somewhat like the scapula of a mammal ; each clasper is f nrnished on the 

 inner lateral margin with a strip of pale chitin which curres outwanlt; and touclies 



Fig. IG. Male armatui-e of Glossina mnrsitaiis:, Westw. ; ventral view. 



the pi'ocess on the opposite .tide near the distal e.vtremitii only : apices divergent, 

 forming a recurved lobe-like extension (»;/) ; inner lateral group of hairs usually 

 relatively shorter than the corresponding group in G. sidmiorsitaris ; these hairs 

 gradually shorten distally and finally merge into strong black spines, the latter 

 also gradually shortening distally and becoming quite minute on the posterior or 

 distal margin. There is a single long hair which has its origin within the 

 mai'gin near the centre of the median process ; in the figure this bristle is shown 

 projecting beyond the clasper and is, in all probability, in its normal position, 

 though in a number of examples it lies pointing towards the proximal portion of 

 the claspers. Harpes (/«) small, spinose, curved upwards and rounded at the 

 tips ; basal process also curved upwards and presenting no very definite form. 

 Vesica, or median process, very small and broadly rounded. Juxta (_/) broadly 



