10 



and Trichodectes scalar is, Nitzsch (little reel cattle louse), are described 

 \Ii.A.E., B. V, 168]. 



Many substances were tested against these parasites ; raw linseed oil 

 proved tbe most effective and will not cause injury, provided that the 

 animals treated are sheltered from the sun for at least 12 hours after- 

 wards. The oil is best applied by means of a brush, but the skin 

 should not be rubbed too vigorously nor the animals exercised. Fumi- 

 gation is not advocated, as it apparently causes a certain amount of 

 nerve strain on cows and a slight falling off of the milk yield for a few 

 days after treatment. Although fumigation killed nearly all the 

 sucking hce after 30 minutes, it did not affect biting hce, 



Byam (Major W.), Captains Carroll (J, H.), Churchill (J. H.), 

 DiMOND (L.), SoRAPURE (V. E.), WiLSON (R. M.) & Lloyd (LI.). 

 Trench Fever — a Louse-borne Disease. — London, Henry Frowde 

 and Hodder & Stoughton, 1919, xvi + 196 pp., 1 plate, 6 figs., 



1 map, numerous charts. Price 10s. M. net. 



This volume contains in extended form the information given in a 

 paper already abstracted [R.A.E., B, vi, 225], but prognosis, treat- 

 ment and prophylaxis are more fully dealt with. New matter includes 

 chapters on immunity and pathology, and a number of appendices, 

 including a summary of the Report of the American Red Cross Re- 

 search Committee [R.A.E., B, vi, 236] by Lieut. R. H. Vercoe, and 

 a copious index. 



Duke (H. L.). An Enquiry into the Relations of Glossina morsitans 

 and Ungulate Game, with special Reference to Rinderpest. — 



Bull. Entom. Research, London, x, no. 1, November 1919, pp. 7-20, 



2 charts. 



The opinion is held by many that the great rinderpest epidemic in 

 Africa of the 'nineties resulted in a marked decrease in Glossina morsitans 

 in the fly areas through which the disease passed, amounting, in some 

 districts at least, to the immediate or eventual disappearance of the 

 fly, owing, it is thought, to the death of much of the wild game upon 

 which it depended for food. In this paper the evidence bearing on 

 the interrelation of game, fly and rinderpest is considered and is dis- 

 cussed with the aid of personal experience and observation. In no 

 instance has prolonged existence of G. morsitans been discovered in 

 •an area where game is entirely and permanently absent. The fly is 

 generally found associated with game in considerable numbers and 

 variety, though it may occur in locahties where wild ungulates are 

 apparently scarce. The theory regarding buffalo as essential to the 

 subsistence of the fly has been found untenable. 



Rinderpest was found to affect some species of game very severely, 

 while leaving others almost untouched. During the rinderpest 

 epidemic of the 'nineties the tsetse of South Africa were affected 

 differently in different localities. They were either apparently 

 unaffected, markedly reduced in numbers temporarily or permanently, 

 or reduced to the point of ultimate extinction. Generally, however, 

 the passage of rinderpest throughout the fly country was marked by 

 a great diminution in the numbers of tsetse. Experiments described 

 in this paper were undertaken to determine whether rinderpest blood, 



