- 374 - 



animals without causing any serious accident, can not reasonably 

 be considered dangerous. 



BAINBRIDGE. F. A. On the Paratyphoyd and food- poisoning 

 Bacilli, and on the Nature and Efficiency of certain Rat 

 Viruses. (Jour. Path, and Bact. 13 (1909), no. 4, 443-466} 

 E. S. R. XXI, Aug., 1909. 



*' The viruses examined owe their potency to one or other ot 

 two bacilli which are indistinguishable from B. aertryck or B. en- 

 tfritidis respectively. 



" Under the conditions of the experiments, namely, the pro- 

 vision for the rats of abundant space, food, and shelter, the des- 

 tructive power of the viruses was inconstant, the death-rate in dif- 

 ferent experiments varying from 20 to 50 per cent. 



" Experiments made with phosphorus paste under similar con- 

 ditions caused a higher and more uniform mortality than did any 

 of the viruses, the death-rate varying from 61 to 67 per cent. 



"There is reason to believe that a certain proportion of the 

 rats fed on the virus become immune, and would therefore be un- 

 likely to succumb to a second infection. 



" The statements of the entire innocence of the viruses for man 

 require justification. " 



A bibliography of 28 titles is appended. 



C. MORLEY. The Ichneumons of Great Britain. (Plymouth, 



1907, Vol. 2, pp. xvi-35i, pi. i, figs. 22; 1908, Vol. 3, pp. xvi- 

 328, pi. i, fgs. 14); E. S. JR., Febr. 1910. Washington. 



A descriptive account of the families, genera, and species in- 

 digenous to the British Islands, together with notes as to the clas- 

 sification, localities, habitats, hosts, etc. 



In the first volume, the Ichmumonidce are considered; in the 

 second volume the Cryptince are taken up, 41 genera and 317 

 species being recorded, of which 2 genera and 7 species are new 

 to science; and in the third volume the Pimplincz are considered, 

 39 genera and 211 species being recorded, of which i genus and 

 8 species are new to science. 



G. H. F. NUTTALL. The Ixodoidea or Ticks. (Jmirn.R.Inst.Publ. 

 Health^ 16, 1908, No. 7, pp. 385-403, figs. 20); abs. E. S. R.,. 

 XXI, Aug. 1909. 



In this, the first Harben lecture, the author discusses the ticks,, 

 their life history, habits, and role in disease transmission. 



