300 ENTOMOLOGICAL NEWS. [Oct., '06 



(4) Sleeping sickness is reported to be spreading southward 

 through Angola. 



In view of the considerations brought forward under this 

 head, we need not be surprised (if we remember the history 

 of the spread of scourges of Uganda and the Congo) if Gl. 

 palp alls wcllmani play in the near future a leading role in West 

 African Medical History. 



RELATION OF GL. PALPALIS WELLMANI TO OTHER TSB-TSE 



FLIES. 



The Tse-flies are known from other members of the same 

 family by the palpi forming a complete sheath for the proboscis, 

 by the peculiar antennae with 

 branched hairs on the upper surface 

 only of the arista, by the character- 

 istic wing venation, by the wings 

 closing over one another like scis- 

 sors, by the grooved wing mem- 

 brane and by the peculiar hypopy- 

 gium of the $ . Following are brief 



Fig. 2. Proboscis and palpi of Gl. 



notes Oil the known Species with palpalis wellmani separated 



and magnified. 



some special remarks on the par- 

 ticular species to which belongs the fly we have been discussing. 



Genus GLOSSINA Wiedemann. 



(1) Glossina tachinoides Westwood. Described in 1850. 

 Carries Trypanosoma brucei of nagana, the Tse-tse fly disease 

 of game and domestic animals in Africa. Hind tarsi dark; 

 abdomen buff with dark transverse bands, oblong pale area in 

 center of second segment. Small species. Length 8 mm. 



(2) Gl. palpalis, Robineau-Desvoidy. Described in 1830. 

 Carries Tr. gambicnsc, the parasite of human trypanosomiasis, 

 which is considered to be the chief factor in sleeping sickness, 

 and also Tr. brucei. Abdomen brown with triangular pale 

 area in center of second segment. Darker than preceding and 

 a larger species. Third joint of antennas dark. Length 8-9 mm. 



It is a variable species and under it falls the subspecies above 

 considered : 



