356 EXPERIMENT STATION RECORD. [Vol. 36 



Second campaign against locusts (Stauronotus niaroccanus) in Algeria by 

 means of Coccobacillus acridiorum, M. BfiouET {Ann,. Inst. Pasteur, 29 {1915), 

 No. 10, pp. 520-536) .—This is a report of work carried on in continuation of 

 tliat previously noted {E. S. R., 33, p. 653). 



Third campaign against locusts (Schistocerca peregrina) in Algeria by- 

 means of Coccobacillus acridiorum, M. Beguet, L. Musso, and iStienne Ser- 

 GENT {Bul. Soc. Path. Exot., 8 (1915), No. 9, pp. 634-637; abs. in Rev. Appl. Ent., 

 Ser. A, 4 (1916), No. 2, p. 45). — A continuation of the work noted above. 



The native food plants of the apple red bugs, R. A. Cushman (Proc. Ent. 

 Soc. Wash., 18 (1916), No. 3, p. 196). — The author reports observations of the 

 apple red bugs (Heterocordylus malinus and Lygidea mendax) at Geneva and 

 Westfield, N. Y., and Clearfield, Pa. 



" It is evident that the natural food plant of H. malinus is not Pyrus but 

 Crataegus, that the reverse is true for L. mendax, and that L. mendax is more 

 likely to attack apple than is H. niaUmis. It would seem that a reversal of the 

 specific names would have been inore indicative of the true conditions, though 

 not entirely appropriate, since the apple is not the natural food plant of 

 either." 



Bedbugs and relapsing fever, V. K. Stephansky (Riiss. Vrach, 14 (1915), 

 No. 10; abs. in Jour. Anwr. Med. Assoc., 65 (1915), No. 11, p. 987). — The author 

 reports that spirochetes ingested by old and young generations of bedbugs en- 

 gorged upon patients with relapsing fever lost their motility within one hour 

 and disappeared altogether after four or five hours. In experiments in which 

 ten adult bedbugs infected with relapsing fever were killed and an emulsion 

 made of them in normal salt solution, negative results were obtained when 

 injected subcutaneously into monkeys. Sixty-five infected bedbugs and their 

 young were fed once a week on the blood of a perfectly healthy man, who 

 during the course of two months was bitten by them at least 500 times and 

 remained unaffected. 



From these results the author concludes that this insect plays no part in the 

 spread of relapsing fever. 



A contribution to the knowledge of the bloodsucking Hemiptera of Central 

 America, A. Neiva (Brazil Med., 29 (1915), No. 1, pp. 1-3; abs. in Jour. Amer. 

 Med. Assoc., 64 (1915), No. 10, p. 867). — This is a preliminary note on the 

 hematophagous Hemiptera of Central America. 



The temperature necessary for the destruction of lice and their eggs, A. W. 

 Bacot (Brit. Med. Jour., No. 2874 (1916), p. 167; abs. m Rev. Appl. Ent., Ser. B, 

 4 (1916), No. 4, PP- 57, 58). — The author concludes " that dry heat or submersion 

 in water at 55° C (131° F.) kills both active lice and their eggs. It follows as 

 a consequence that considerably lower temperatures than those usually em- 

 ployed may be used to destroy these vermin. For the thorough sterilization of 

 infested garments the question of penetration is all-important. It is probable 

 that considerable economy in fuel might be effected by allowing a longer ex- 

 posure at a lower temperature, while it should be practicable to use quite 

 lightly built chambers or temporarily adapted rooms to obtain dry air tem- 

 peratures of, say, 60° C. (140° F.)." 



Rosy apple aphis, A. C. Baker and W. F. Turner (U. S. Dept. Agr., Jour. 

 Agr. Research, 7 (1916), No. 7, pp. 321-344, pis. 6).— This plant louse is said to 

 be undoubtedly the most injurious leaf-feeding apple aphis, since its attacks 

 not only injure the foliage and deform the growing apple trees but when 

 abundant or unchecked it deforms the fruit, causing the production of " aphis 

 apples " which are unfit for sale. The present paper is based upon studies 

 conducted during the seasons of 1914 and 1915 in the vicinity of Washing- 

 ton, D. C. 



