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BouET (G.). Contribution a I'Etude des Zones a Glossines du Senegal 

 (Region du Chemin de Fer de Thies a Kayes). [Contribution to the 

 Study of Glossina Zones in Senegal in the Neighbourhood of the 

 Thies to Kayes Railway.]— -BmZ^. S02. Path. Exot., Paris, ix, 

 no. 10, 1916, pp. 802-813. 



The railway which is to connect Senegal with the Soudan, from 

 Thies to Kayes, and which is now in course of construction, passes 

 through a zone infested with Glossina morsiians. The country 

 traversed does not seem to be either botanically or climatically 

 incompatible with the existence of G. morsiians, yet this species is 

 only found in certain areas which are identical with those occupied 

 by big game, or are at least traversed by these animals at certain 

 periods of the year. The Glossina of these zones, as well as those 

 in the region of Upper Gambia, apparently only transmit Trypan- 

 osoma dimorphofi, and are at present not infected with the other 

 animal trypanosomes of Western Africa, such as T. pecaudi and 

 T. cazalboui. It is to be feared that the passage of many herds, 

 particularly of humped cattle destined for the factory at Lyndiana, 

 which come from all the Soudanese regions, will introduce into the 

 Thies-Kayes district the other trypanosomes that G. morsiians is 

 capable of transmitting. On the other hand, the Soudanese animals 

 passing through this region will become contaminated with 

 T. dimorphon. As the majority of these animals pass at once into the 

 Lyndiana factory to be killed, there will be very slight loss from this 

 cause, but the incidence of disease will certainly increase. If care 

 be taken to convey the cattle in screened wagons, as is done on the 

 Ivory Coast railway, this danger would be obviated. In time, the 

 establishment of a population along the course of the railway, who 

 settle there to cultivate ground-nuts, will drive away the big game 

 and, consequently, G. morsiians also. Another feature of these regions 

 infested with Glossina is the existence of a race of small cattle which 

 are immune to tsetse-borne trypanosomiasis. The presence of tsetse- 

 fly in Western Africa bars the extension of humped cattle to the south, 

 and strictlv limits the existence of cross-bred races. 



Fletcher (T. Bainbrigge). Report of the Imperial Pathological 

 Entomologist. — Rept. Agric. Research Inst. & Coll.,Pusa, 1915-16, 

 Calcutta, 1916, pp. 78-84. [Received 8th January 1917.] 



Observations have been continued on the life-histories of various 

 Tabajstidae occurring at Pusa. Notes are given on the hfe-histories 

 of Tabanns nemoadlosus, the larvae of which are not, apparently, 

 cannibals ; T. alhimedius, which is parasitised by a small Chalcidid, 

 and has three broods annually ; T. striatus, which also has three 

 broods ; T. sanguineus ; T. hilaris ; Chrysops stimulans, of which 

 the larvae feed on dead earthworms and are probably also cannibals ; 

 the larvae of Gastroxides ater were found in hollows in tree-tnmks. 



An account is given of transmission experiments with biting flies 

 in the zone where surra is prevalent. Tabanus albimedius and 

 T. striatus were found capable of transmitting the surra organism, 

 not only by an interrupted feeding, but also by complete feeding. 

 T. albimedius was proved to transmit surra 24 hours after feeding 



