21 



Glossina severini, Newst. (\06a. 1913). The only specimens of 

 this Tsetse-fly hitherto discovered are two males from Belgian Congo. 



Besides giving details of the genital armature, accompanied by a 

 figure, Newstead characterises the species as follows : 



" Male. Hind tarsi either uniformly dark brown, or with the first 

 and second segments slightly paler than the rest ; pleurae and hind 

 coxae dusky grey, harpes very small, narrow and irregularly serrated 

 distall y. 



"Length (two specimens), 10-3 to 10-5 mm. Length of wing, 

 10-5 mm. 



" Palpi relatively long and stout. Third segment of the antennae 

 clothed with short hair. Thorax very robust, markings well defined 

 and of the usual type or similar to those in Glossina palpalis ; pleurae 

 dusky grey. Legs with the hind coxae grey or greyish-buff ; tips of 

 front and middle tarsi black ; hind tarsi all dark (almost uniformly so 

 in one example), or with the first and second segment slightly paler 

 than the rest. Abdomen almost unicolorous." 



The typical specimen, which, Newstead states, " had evidently been 

 preserved in alcohol, so that it is highly probable that the colours may 

 have been slightly changed," was taken on Lake Moero (R. Luvua), 

 in May 1907; the precise locality where the second example was 

 obtained is unknown. 



Although simple reliance on the coloration of the hind tarsi might 

 lead us to assign G. severini to the G. palpalis Group, it would appear 

 that other characters exhibited by the species afford no warrant for 

 such procedure, and Professor Newstead writes : 



"As to the affinities and characteristics of this new Tsetse-fly, one 

 gathers from the two examples that, so far as the colour of the hind 

 coxae and pleurae are concerned, it resembles G. fuscipleuris ; but it 

 has relatively longer and stouter palpi ; and, furthermore, is dis- 

 tinguishable from the latter by the darker and more uniformly 

 coloured hind tarsi. 



" If we take the structural characters of the male genital armature, 

 we find that it is very closely related to G. medicorum, Aust., from 

 which it may, however, be readily separated by the curious rudimentary 

 harpes, the greater length of the marginal hairs of the editum, and, 

 furthermore, by the greater length of the lateral branches of the hairs 

 of the arista." 



Nothing is yet known as to the bionomics or habitat of this species, 

 so that it is to be hoped that readers of this work who may visit or 

 be stationed in south-eastern Belgian Congo will be able to supply 

 the necessary information, in addition to obtaining further specimens 

 for study. 



Glossina schwetzi, Newstead and Evans (109. 1921). Apart from 

 details of the "strikingly characteristic" genital armature of both 

 sexes, which is described and figured by the authors, the following 

 are the chief diagnostic characters of this species, as given by Professor 

 Newstead and Miss Evans. 



" Hairs of the third antennal segment about one-sixth to one- 

 seventh the width of the segment. Wings of the female with the 

 thickened portion of the anterior transverse vein darker in colour than 

 the rest. Harpes of the male divided into three processes, the proximal 



