358 EXPEKIMENT STATION KECORD. 



larvae to which these organisms have been administered. When the larvse have 

 been bred from disinfected ova and are subsequently fed on B. dysenteriw 

 (type 'Y'), this organism may be successfully recovered from the pupae and 

 imagines in a small proportion of cases. Under similar conditions B. typhosus 

 was not recovered in a single case from pupje or imagines. In those cases in 

 which B. dysenteriw (Y) was successfully recovered from pupi^, the colonies 

 on the plate were invariably fewer than those obtained from pupae and imagines 

 jifter administration to the larvae of more adaptable organisms such as ' Bacillus 

 A' (Ledingham). When organisms such as 'Bacillus A' were administered 

 to larvae bred from disinfected ova, or nondisinfected ova contaminated with 

 this organism, it was in many cases possible to recover the organism from pupae 

 and imagines. In no series of pupae examined after administration to the 

 larvae of either B. dysenteriw or ' Bacillus A ' was it possible to recover the 

 organisms in every instance. A certain proportion of pupae in both cases proved 

 sterile, so that the process of metamorphosis is undoubtedly accompanied by a 

 considerable destruction of the bacteria present in the lai'val stage. 



"The temperature at which the lan-ae develop (19-25° C.) has probably an 

 important bearing on the survival of pathogenic organisms such as ' Bacillus Y ' 

 of dysentery, administered in association with organisms such as ' Bacillus A,' 

 in view of the fact that the latter grows far more luxuriantly at this tempera- 

 ture. Even when grown in broth at 37° (the optimum temperature for Bacillus 

 Y) together with ' Bacillus A,' the ' Bacillus Y ' was found to form after 2 days 

 only one quarter of the total number of bacteria present in the mixed growth. 

 There was no evidence that the larval juices contained substances bactericidal 

 for Bacillus Y. The bacilli died more rapidly in normal saline solution. The 

 possibility of flies becoming infected from the presence of pathogenic organisms 

 in the breeding ground of the larvae may be considered as very remote." 



The relation of the stable fly (Stomoxys calcitrans) to the transmission 

 of infantile paralysis, C. T. Brues (Jour. Econ. Ent., 6 {1913), No. 1, pp. 

 101-110). — This is a review of recent work on the subject. 



Tachinidae and some Canadian hosts, J. D. Tothill (Canad. Ent., .'/.5 

 (J 913), No. 3, pp. 69-75).— The author records the rearing of Tachinida? (30 

 species) from 39 hosts not previously recorded. 



Muscoid parasites of the cotton-stainer and other lyg'osids, C. H. T. Town- 

 send (Psyche, 20 {1913), No. 2, pp. 91-94). — The author records the rearing 

 in Peru of Xanthomelanodes pertuinus from Stenomacra sp. and .icaulona 

 pertwiana n. sp. from Dysdercus ruflcolUs. 



Inquiry into the relationships and taxonomy of the muscoid flies, C. H. T. 

 TowNSEND {Canad. Ent., ^5 {1913), No. 2, pp. 37-57). — A somewhat detailed 

 discussif n of the subject. 



A synopsis of the Sapromyzidas, A. L. Melander {Psyche, 20 (1913), No. 2, 

 pp. 57-82, pi. 1). — This review is based upon studies of 80 spcjies o'. the 

 family. Working tables for the separation of both genera and s[)ecies are 

 included. 



The Coleoptera of the British Islands, W. W. Fowler and II. St. J. Donis- 

 THORPE (London, 1913, vol. 6, pp. XIII+351, pis. 23). — This is a supplement 

 to a work, the fifth and concluding volume of which was pub'ished in 1891." 



The first part (pp. 1-200) of this supplement consists of a discussion of 

 species not included in the previous volume. This is followed by a list of addi- 

 tional localities, notes, etc. (pp. 201-319). The myrmecophilous Coleoptera of 

 Great Britain are discussed in a pai^er by H. St. J. Donisthorpe (pp. 320-.3;]0). 

 The addenda include various miscellaneous data. 



« The Coleoptera of the British Islands, C. Fowler (London, 1891, vol. 5, pp. XXVIII + 

 490, pis. 38). 



