329 

 Bogdaxov-Katkov (N. N.). neiporpaACKoe OropoAHiiMecTBO m 



BpeAMienM. [Petrograd Kitchen Gardening and Pests.] — 

 nerporpaACKOe OropOAHMHeCTBO [Petrograd Kitchen Gardening], 

 Petrograd, 1921, no. 1, pp. 47-78, 19 figs. 



The history and work of the Petrograd station for the Protection 

 of Plants from Pests during 1918-20 is reviewed. The remedial 

 measures adopted are chiefly cultural, but also include spraying and 

 •dusting. 



The pests dealt with are: — Phorbia {Chortophila) brassicae, Bch. ; 

 Phyllotreta undulata, Kutsch. ; P. nemormn, L. ; P. vittata, F._; 

 P. nigripes, F. ; Barathra [Maniestra) brassicae, L. ; Plntella maciili- 

 pennis, Curt. ; Brevicoryne {Aphis) brassicae, L. ; Pieris brassicae, L. ; 

 P. rapae, L. ; Euxoa {Agrotis) nigricans, L. ; wire-worms ( Agriotes 

 and Athous spp.) ; Phaedon cochleariae, F. ; Hylemyia antiqiia, 

 Meig. ; Eumerus strigatus, Fall. ; Meligethes aeneus, F. ; Polia siiasa, 

 Schiff. ; P. oleracea, L. ; Sitones crinitus, 01. ; S. lineatus, L. ; Pionca 

 Jorficalis, L. ; /{phis gossypii, Glov. ; Ceiithorrhynchns quadridens, 

 Panz. ; ' C. sulcicollis, Gyll. ; C. contractus. Marsh. ; Athalia 

 spinarwn, L. ; Eitrydema festivum, L. ; E. oleraceiim, L. ; E. 

 dominidum. Scop. ; and Tetranychns telarius, L. 



CouvREUR (E.) .S: Chahovitch (X.). Sur un Mode de Defense natiirelle 

 contre les Infections microbiennes chez les Invertebres.— C. R. 



Hebdom. Acad. Sci., Paris, clxxii, no. 11, 14th March 1921, 

 pp. 711-713. 



The experiments described were in progress in June 1920 and 

 confirm the conclusions arrived at b\- Paillot with reference to immimity 

 in invertebrates [i?.. 4. £., A, ix, 234]. They were carried out with 

 the larvae and pupae of Bombyx {Sericaria) mori. both Bacillus coli 

 and the organisms of blue piis [B. pyocyaneus] being destroyed by 

 the body fluid and digestive juices of this moth. 



Paillot (A.). Role des Humeurs dans la Destruction extracellulaire 

 des Microbes chez les Insectes. — C. R. Hebdom. Acad. Sci., Paris, 

 clxxii, no. 14, 4th April 1921, pp. 876-878. 



In view of statements in the preceding paper, it is pointed out 

 that the phenomenon of the destruction of micro-organisms by the 

 action of blood and digestive juices of insects in vitro is not new, and 

 was only mentioned in a recent paper by the author [R.A.E., A, 

 ix, 234] as an argument in favour of the theory propounded therein. 



CouvREUR (E.) & Chahovitch (X.). Contre les Infections microbien- 

 nes chez les Invert6br6s. — C. R. Hebdom. Acad. Sci., Paris, 

 clxxii, no. 18, 2nd May 1921, pp. 1126-1127. 



The criticism of the authors' previous paper [see preceding abstract] 

 is discussed. They do not claim to be the discoverers of the phe- 

 nomenon of the destruction of micro-organisms by various body fluids 

 in insects, but merely state that the fact occurs. 



