are proved carriers of disease. Cemtophyllus ainsus and Cteno- 

 fhthahnus agyrtes are proved carriers, but are not known to bite man ; 

 whilst Ceratopkyllus acutus, Spilopsyllus cuniculi and CtenocephalusfeUs, 

 althougb known to bite man, have not been known to spread disease. 

 A separate list is given of fleas found on rats in Britain, and the 

 method of transmission of plague by fleas is discussed [R.A.E., 

 B. ii, 60]. 



Bacot (A. W.). Lice : The Diseases carried by them and the Measures 

 available for the Protection of Children and CiviUans. — School 

 Hygiene, London, March 1919, Separate 16 pp. [Received 4th 

 November 1919.] 



Popular information on the habits and life-histories of lice and the 

 effects of their bites is given, and preventive measures as well as the 

 usual methods for the destruction of the species parasitic upon man 

 are discussed. Those dealt with include Pediculus capitis (head louse), 

 P. humanus (corporis) (body or clothes louse) and Phthirus pubis 

 (crab louse). The diseases conveyed by lice are also reviewed. 



Bacot (A. W.). Danger of Disease through Lice ; how to avoid it, — 

 L.C.C. Education Committee, London, May 1919, 8 pp., 1 fig. 



This leaflet is intended for the use of all those whose duty it is to 

 look after the health and welfare of children. 



Taylor (J. F.). The R61e of the Fly as a Carrier of Baeillary Dysentery 

 in the Salonica Command. — Med. Research Committee Nat. 

 Health Insurance, London, Spec. Kept. Ser. 40, 1919, pp. 68-83, 

 2 charts, 1 fig. 



Two years' experience of the Salonica Command has shown that, 

 while baeillary dysentery occurred to some extent among the troops 

 throughout the warmer months, it assumed greater prevalence during 

 the periods from spring to early summer and from late summer to 

 early autimm, i.e., at the periods when flies were most numerous. 

 Investigations are described that show that flies are a definite factor 

 in the incidence of baeillary dysentery. Observations were begun in 

 March and ended in November on the incidence of flies compared 

 with the prevalence of disease in the same area. Two hospitals were 

 situated in this area and by means of fly-traps the average number 

 of flies caught per diem was estunated, and is shown in a chart. The 

 temperature and humidity curves during the period are also shown. 

 The method of calculating the incidence of dysentery is described 

 and the observations recorded on a chart, from which the fact is 

 established that the incidence of dysentery corresponds to the 

 prevalence of flies. 



In a series of experiments flies were fed on material known to contain 

 Flexner or Shiga bacilli and were subsequently exammed after varying 

 intervals with a view to the recovery of these organisms from them. 

 The method of feeding and the cages used are described ; the method 

 adopted was to allow the flies to walk about naturally over a plate 

 containing a medium, followed by examination of the faeces and of 

 the legs. The results establish the fact that flies are capable of carrying 



