aw 



Paillot (A.). Ck)ecobaeilIes nouveaux Parasites du Hanneton. [New 

 parasitic Coccobacilli of the Cockchafer.] — G.R. hebdom. Acad. 

 Sd., Fari&, ckvii, no. 26, 2&d December 1918, pp. 1046-1048. 



In the Lyons region in 1916, 3 coccobacilli and 3 other microbes 

 had been isolated from diseased cockchafers [Melolontha melolontha] 

 [see this Review, Ser. A, v, p. 161], and in the following year 3 othef 

 coccobacilli, quite different from these, were isolated from the sam»6r 

 insect in Touraine, and were named Bacillus metolonthae liquefasciens 

 p & y and B. melolonihae nonliquefasciens 5. Observations made 

 i» 1917 afford a proof of the multiplicity of epidemic maladies capable 

 of checking the increase of the cockchafer. The same conclusions 

 may be drawn from similar studies on other insects such as Porthetfid 

 dispar, Piefis brassicae, and silkworms [Bomhyx rnori], it being a 

 fact that the microbic flora of insects is not surpassed in richness afiid 

 variety by that of vertebrates. 



The most wide^-spread form of infection is septicaemia, but the 

 microbes of insects have never exhibited a specificity for the tissues 

 of the host as great as that of certain parasites of man, such as the 

 meningococcus or gonococcus. 



Paillot (A.). La Pseudograsserie, Maladie nouvelle des Cbenilles de 



Lymantria dispar. — C.R. hebdom. Acad. Sd., Paris, clxviii, no. 4, 

 27th January 1919, pp. 258-260. 



A larva of Porthetria {Lymantria) dispar which exhibited the external 

 symptoms of grasserie and of flacherie was found to be infected with 

 two coccobacilli, one of which alone caused the disease here dealt 

 with. An emulsion of the bacilli, obtained from a pure culture, 

 produced the disease in its typical form. A few hours after inoculation 

 the blood presented the same milky appearance as that of larvae 

 attacked by grasserie, but it was clouded with globules of oil instead 

 of the polyhedral bodies of an unknown nature characteristic of true 

 grasserie. 



The inoculation of the microbe into th^e larvae of Vanessa urticae, 

 Nygmia phaeorrhoea {Euproctis chrysorrhoea) and silkworms [Bombyx 

 mori] reproduced the symptoms observed in the larvae of Porthetria 

 dispar ; hence the new disease is named " pseudograsserie." In 1918, 

 no new case was observed owing to the rarity of epidemic diseases 

 due to the extreme dryness of the season. 



Paillot (A.). Coccobacllles Parasites des Chenilles de Pieris brassicae. 

 ~C. R. hebdom. Acad. Sci., Paris, clxviii, no. 9, 3rd March 1919, 

 pp. 476-478. 



This paper deals with five coccobacilli, four from the region of 

 Lyons and the fifth from the Jura, obtained from the larvae of Pierii 

 hrassicae. 



TijMSTRA Bz. (S.). Schweinfurter Groen. [Paris Green.] — Bull. Deli 

 Proefstation, Medan, no. 11, December 1918, pp. 1-7. 



Paris green used as an insecticide is apt to scorch the foliage of 

 plants owing to the presence of soluble arsenious acid, but the amount 

 of injury caused by it is not proportional to the amount of arsenioifis 



(C6G0) c 



