59 



motile "coccobacilli," often paired in two's, some in the 

 coccus form and others rod-shaped. After the larvae died 

 of a septicemia, the "body quickly decomposed. 



* Paillot, A. 1913 Coccobacilles parasites d'Insectes. 

 Compt. rend. acad. sci. , 157, 6o8-6ll. 



BAC I LLUS GRAPHITOSIS 

 (See Bacillus tracheitis sive graphitosis ) 



BAC I LLUS GRYLLOTALPAE Metalnikov and Meng 



Insect concerned: Gryllotalpa gryllotalpa ( vulgaris , Latr. ) 



This "bacillus was one of two "bacteria which were found 

 to "be the cause of the death of Gryllotalpa gryllotalpa 

 in the laboratory. • Bacterium gryllatalpae (which see) was 

 the other organism. 



^•Metalnikov, S. , and Meng, L. Y. 1935 Utilisation des 

 microbes contre les courtillieres. Compt. rend. acad. 

 sci. , 201 , 36T-368. 



BAC I LLUS HOPLOSTERNUS Paillot 



Insects concerned: Nygmia phaeorrhea ( Euproctis chrysor - 

 rhoea); the cockchafer, Melolontha melolontha ; Malacosoma 

 neustria ; Arctia ( chelonia ) caja ; Yanessa urticae ; Eorthe - 

 tria ( Lyman tria ) dispar . 



Paillot (1919) found Bacillus hoplosternus , which he 

 had isolated from diseased cockchafers, to "be very patho- 

 genic for Nygmia phaeorrhea . The insects died within 2k 

 hours after "being inoculated. He found the same thing to 

 "be true with Malacosoma neutria, Arctia caja , and Vanessa 

 urticae . In the case of the last two insects, Paillot 

 found the "blood at death contained few "bacteria, and con- 

 cluded that the "bacillus is chiefly pathogenic "because of 

 a toxin it secretes. Porthetria dispar showed a decided 

 immunity to the "bacillus. Paillot (1933) has discussed 

 in quite some detail the cytology of Bacillus hoplosternus . 



* Paillot, A. 1919 Contribution a 1' etude les parasites 



microbiens des insectes. Etude de Bacillus hoplosternus 



(Paillot). Ann. Inst. Past., ^3, U03-^19- 



Paillot, A. 1933 L' infection chez les insectes, 535 PP« 



Imprimerie de Trevoux, Paris. (See pp. 15^-156, and 



others. ) 



