54 



sufficient numbers to prevent their being forced to feed on man. As 

 soon as the proportion of cattle was raised, a safe equihbrium was 

 reached. If these facts are correct, no protection can be expected from 

 the introduction of cattle into highly malarious districts where the 

 mosquitos have not yet acquired a taste for them, but it is worth 

 consideration whether the introduction into such districts of Anophelines 

 that have acquired a liking for cattle, together with the cattle them- 

 selves, might not produce a satisfactory protection, the Anophelines 

 concerned replacing those already there. 



Larrousse (F.). La Myiase oculaire a Oestrus wis, L., dans la Region 

 Parisienne. — Bull. Soc. Path. Exot., Paris, xiv, no. 9, 9th Novem- 

 ber 1921, pp. 595-601, 5 figs. 



A first-stage larva of Oestrus ovis, L., was removed from the eye of 

 a patient suffering from acute conjunctivitis. This is apparently the 

 third case of this kind occurring in France. As the first-stage larva 

 is frequently confused with that of Rhinoestrus purpureus, Brauer, 

 the distinguishing characters of these larvae and illustrations of them 

 after Portchinsky [R.A.E., B, i, 134] are reproduced. 



The author considers the case recorded b}^ Fiilleborn [R.A.E., 

 B, viii, 151, 169] to be due to Oestrus ovis. 



Bodkin (G. E.). [Report of the Government Economic Biologist.] — 



Ann. Rept. [British Guiana] Dept. Sci. & Agric, 1919, Denierara, 

 1920, Appx. iii, 9 pp. [Received 29th December 1921.] 



Mosquito breeding-places were studied in British Guiana in 1919, 

 and the following were found : — Anopheles argyritarsis , R.-D., in 

 small drains overgrown with grass ; Aedomyia squamipennis , Theo., 

 in a trench covered with Salvinia ; Aedes {Cidicclsa) taeniorhynchus, 

 Wied., in a trench, the adults being very prevalent in April in the late 

 evening and early morning ; and Taeniorhynchus {Mansonia) titillans, 

 Walk., in trenches overgrown with grass and water-lilies. 



The ticks collected included : — Amblyomma cajennense, F., on man 

 and armadillo ; A . maculatum, Koch, on a dog ; and A . concolor, 

 Neum., and A. pacae, Arag., on armadillos. 



Brues (C T.). Insects as possible Carriers of Poliomyelitis Infection. 



— Dept. Health, New York, Reprint Ser. no. 60 (Monogr. Ser. no. 16), 

 July 1917, 30 pp., 2 maps, 5 figs. [Received 29th September 1921 .] 



This is a report of the work undertaken to obtain evidence whether 

 or not insects play an important part in the spread of poliomyelitis. 

 The conclusions arrived at are not so definite as had been hoped, and 

 are to some extent conflicting. They do not completely disprove the 

 idea that Stomoxys calcitrans is implicated, although the behaviour of 

 the present epidemic does not favour this view. To discard it is to 

 set aside evidence derived from two sets of experiments, which seems 

 unwise at the present time of uncertainty. So far as present knowledge 

 goes, mosquitos and Tabanids have no connection with the transmission 

 of this disease. It has been shown to be possible, with one assumption, to 

 form a working hypothesis based upon rats and fleas, which seems to 

 fit the epidemiological observations. The assumption that the rat can 

 act as a reservoir of the virus of this disease should be capable of 



