154 EXPEEIMENT STATION EECOED. 



which remains to be discoA^ered. It is thought that this may represent Oncho- 

 cerca gibsoni, the cause of the verminous nodules in cattle, accounts of which 

 by others have been previously noted (E. S. R., 31, p. 182; 32, p. 376). 



Insect pests of coconuts (Agr. News [Barlados], 14 {1915), No. 333, pp. 42„ 

 ^3). — A summarized account of coconut insect pests, particularly the black 

 or rhinoceros beetle {Oryctes rhinoceros), and the red beetle or Asiatic palm 

 weevil (Rhynchuphorus ferrngineus). 



Insects affecting the lime, F. W. Urich {Proc. Agr. 80c. Trinidad and To- 

 hago, 15 {1915), No. 1, pp. 16-18).— Brief notes on the more important enemies 

 of the lime in Trinidad. 



In regard to the poisoning of trees by potassic cyanid, F. Sanfokd {Sci- 

 ence, n. ser., 4I {1915), No. 10^9, pp. 213, 21Jf).—A supplement to the article 

 previously noted (E. S. R., 32, p. 152). 



Homemade lime-sulphur concentrate, E. W. Scott {U. S. Dept. Agr. BuL 

 197 {1915), pp. 6). — This is a report of work conducted at Beri-yville, Win- 

 chester, and Vienna, Va., Hagerstown, Md., and Benton Harbor, Mich., for 

 the purpose of encouraging orchardists in the preparation of concentrates for 

 their own use, or for the use of the neighborhood. 



The results of cooking different lots of lime and sulphur in the different 

 localities are reported in tabular form. The best methods of preparing the 

 lime-sulphur concentrate and the relative cost are described. 



Concerning some medico-entomological problems, E. Martini {Arch. 

 Schiffs u. Tropen Hyg., 18 {1914), Beihefie 7, i)p. 67-76, fig. i).— This article 

 deals esiiecially with the habits of mosquitoes. 



The effect of Coccobacillus acridiorum on Pachytylus migratorius, D. 

 BoEODiN {Ent. Viestnik [Kief], 2 {WW, No. 1, pp. 5^-86, fig. i).— During the 

 summer of 1913 the author conducted exi>eriments in the Government of 

 Stavropol in North Caucasus, during the course of which C. acridiorum was 

 injected into the abdominal cavity of several Orthoptera, namely, P. migra- 

 torius, Oidaleus nigrofasciatus, Stauronotus maroccanus, Arcyptera flavicosta, 

 and Tmeiis viuricatus. 



The results are summarized as follows: 



These injections were pathogenic for all these insects and brought about 

 death in 83 hours. The virulence had been increased by passing the infection 

 through many series of P. migratorius. The increase of the pathogenic strength 

 of the culture was ascertained, and in the first two series death resulted in 

 83 hours, while in the following series (up to the fourteenth) the time de- 

 creased to six hours. All the insects do not die in the earlier series; some 

 continue to live and mnj possibly acquire immunity. Death results more 

 or less quickly, depending upon the conditions of the experiment (tempera- 

 ture and amount of culture injected). If the infection is introduced by the 

 mouth, death results very slowly and all the insects do not die. These results 

 show that the bacteriological method of locust destruction should be avoided 

 until the question has been more thoroughly studied. So far the method of 

 destruction by poisoned baits has given by far the best results. 



Nysius senecionis as an enemy of newly planted vines, F. Picard (Fie 

 Agr. ct Rurale, 3 {1914), A"o. 22, pp. 610, 611; aJ)s. in Rev. Appl. Ent., 2 {1914), 

 Ser. A, No. 9, pp. 556, 557). — This lygeid, previously nearly unknown, is 

 reported to have injured newly planted vines in Aude, Herault, and Gard in 

 1912 and 1913. In one locality some 12 acres of newly planted vines were so 

 thickly infested by this bug that in places the plants and ground appeared 

 black. One-third of the vines are said to have withered and to have been 

 apparently destroyed. 



