180 SUMMARY OF CURRENT RESEARCHES RELATING TO 



A considerable number of biting and noxious Diptera are recorded, the 

 new species being described by E. E. Austen. F. V. Theobald gives 

 an account of the new genera and species, with their localities, of 

 the mosquitos, and supplies interesting notes regarding various human, 

 animal, and vegetable pests, e.g. the maggot fly, Wengalia depressa, 

 whose larva was found under the skin of a native, and the Congo floor 

 maggot, Aiichmeromyia luteola Fabr., whose maggots occur in native 

 huts, living in cracks in the mud. These they leave at night to suck 

 the natives' blood, and then return to their shelter. A. Balfour 

 describes a Hjfimogregarine, H. balfouri Laveran, from the blood and 

 liver-cells of the jerboa, Jaculus gordoni, with notes on the schizogony, 

 and discusses a probable cycle of development of the same organism 

 within the jerboa flea, Pulex cleopatrce. He also describes a new leuco- 

 cytozoon, Leucocytozoa muris sp. n., from Mus decumanus, at Khartoum, 

 which appears to be closely allied to one described by Patton from an 

 Indian palm-squirrel. 



Trypanosomes appear to occur to a considerable extent in the southern 

 Sudan (south of the 10th parallel of latitude). In cattle, T. nanum 

 produces a disease which rans a chronic course, and may prove fatal. It 

 is a small Trypanosome, not very active ; the free part of the flagellum 

 is extremely short or absent ; the posterior extremity is conical. In 

 mules, two types exist ; one is probably identical with T. dimorphum, of 

 Senegambia. The disease produced is invariably acute and fatal. The 

 other form closely resembles T. nanum ; mules affected with it may 

 apparently recover under favourable conditions. Associated with these 

 were found in gastric lesions, spirilla, which never occurred in the 

 stomach or intestines of uninfected animals. In donkeys, a Trypanosome 

 suggestive of T. brucei was observed. Tsetse flies are the chief, and 

 probably the only carriers of these Trypanosomes. Stomoxys appears, 

 to play no part in the distribution of the disease. 



