29 



" The pupa-case of Glossina morsitans," writes Austen, " is smaller 

 than that of G. palpalis 1 and neater in appearance ; the tumid lips 

 are also conspicuously smaller, and the notch between them lacks the 

 characteristic keyhole-like constriction exhibited by the notch between 

 the lips of the puparium of the latter species. The tumid lips are 

 smaller than those of any other Glossina -puparium at present known " 

 (cf. Figs. 4 and 5, C and F). 



Further notes on the pupa of G. morsitans are supplied by Kinghorn 

 (79), who writes : " The means of the measurements of twenty pupae 

 are as follows, in millimetres, the extremes being given in brackets : 

 Total length, 5-53 (5 to 6) ; width, 3-2 (3 to 3-75) ; depth, 2-97 (2-75 

 to 3-25) ; width across tumid lips, 1 -45 (1 to 1 -5). It will be seen 

 from these data that the pupa is slightly compressed in the dorso- 

 ventral diameter. 



" The larval mouth is represented on the first segment of the pupa 

 as a small black dot, while the anus is similarly marked on the mid- 

 ventral line at the junction of the eleventh and twelfth segments, 

 and is enclosed in a small eye-shaped area marked off by two small 

 furrows, the anterior of which is formed by the dividing line between 

 the two segments. 



! 1 [] 



B 



ffl 



I) 



Fig. 4. Pupae (puparia) of six species of Tsetse-flies, dorsal aspect, natural 

 size. A, G. brevipalpis, Newst. ; B, G. fusca, Walk, (cephalic (lower) extremity 

 missing) ; C, G. morsitans, Westw. ; D, G. pallidipes, Austen ; E, G. austeni, 

 Newst. ; F, G. palpalis, Rob.-Desv. (From photographs of actual specimens.) 



(Reproduced, by permission of the Trustees of the British Museum, from "A 

 Handbook of the Tsetse-Flies [Genus Glossina]," by E. E. Austen. London : 

 British Museum (Natural History), 1911.) 



" The line along which the pupa-case splits to permit of the emergence 

 of the imago is indicated on the anterior portion of the puparium as 

 a small ridge directed laterally. This ridge passes dorsally around the 

 mouth region as a slight curve." 



We append a few notes on the pupae of certain other species of 

 Glossina (cf. Figs. 4 and 5, p. 30). 



Writing with reference to G. brevipalpis, Austen says : " The 

 pupa, which is of the usual black or clove-brown colour, measures 

 about 7-5 to 8mm. in length, by 4 to 4 -5 mm. in greatest breadth ; 

 the shape and dimensions of the tumid lips and the shape of the notch 



1 The following are the dimensions and weight of the puparium or pupa-case 

 of G. palpalis, as given by Roubaud (96) : Length 6-5 to 6-6 mm. ; average 

 width, 3 5 mm. ; weight, 025 grin, to 028 grm. 



