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alimentary tract, or the faeces failed. The author concludes that 

 insects can develop an immunity that can cope more or less success- 

 fully with certain foreign organisms. Experimeat also inchcates that 

 passage infections performed by using the alimentary tract are hopeless 

 on account of the extensive flora. Blood passages with B. ■poncei 

 were also useless in most cases as the gut ruptured after a short time ; 

 blood passages with other bacteria were however found to be possible. 



Two cultures received direct from d'Herelle were labelled respec- 

 tively Souche Cham and Souche Sidi. Experiments with these showed 

 that Souche Cham is pathogenic to M. atlantis, and to M. bivittatus 

 and M. femur-rubrum in a lesser degree. Passage infections with 

 this culture were possible but no increase in virulence was observed. 

 The blood and muscle tissue of M. atlantis can be used for passage 

 infections, but extracts from the stomach or intestines cannot. In 

 food infections the time between inoculation and death is somewhat 

 extended. Both these cultures were quite virulent even when old. 

 Souche Sidi, which represented a strain passed through a series of 

 grasshoppers in Tunisia in 1915, proved less pathogenic to M. atlantis 

 and M. bivittatus than Souche Cham ; no passage infections with 

 this culture were attempted. A large series of field experiments 

 ^^^th these two cultures have been instituted in dealing with M. atlantis, 

 which is a serious pest in certain regions of Vermont, and should 

 prove good material for these experiments on account of its canni- 

 balistic habits and dense swarms. At least another season is required 

 before conclusions can be drawn from these experiments. 



The results of twenty-five experiments in the inoculation of locusts 

 with the various cultures referred to are given. 



Cameron (A, E.). Life-history of the Leaf-eating Crane-fly, CyUndro- 

 toma spleiidem, Doane. — Ann. Entom. Soc. America, Columbus, 

 Ohio, xi, no. 1, March 1918, pp. 67-89, 18 figs. 



In April 1917 the author discovered on Vancouver Island a Tipulid 

 larva feeding in large numbers on the leaves of Trautvetteria grandis 

 (false bugbane), which grows in damp and shady places. The insects 

 were reared to the adult stage and identified as Cylindrotoina splendens, 

 Doane. The species of this genus are peculiar among crane-flies in 

 that the larvae feed openly on bryophytic and spermatophytic 

 plants. Descriptions of the life-history and of all stages of the insect 

 are given. 



Gaexett (R. T.). Notes on the Genus Buprestis, Linn6, in California. 



— Ann. Entom. Soc. America, Columbus, Ohio, xi, no. 1, March 

 1918, pp. 90-92. 



The species dealt ^\dth in this paper include Buprestis aurulenta, L., 

 which infests practically all pines, Douglas fir, western red cedar ancl 

 spruce ; B. laeviventris, Lee, on yellow, lodgepole, digger and sugar 

 pines; B. maculiventris var. subornata, Lee, in Douglas fir and on 

 foliage of western yellow pine ; B. maculiventris var. rusticorum, 

 Kirby, in yellow pine, Douglas, alpine and white fir ; B. adjecta, Lee, 

 in yellow and other alpine pines ; and B. fasciata, Dej., boring in 



(C479) B 



