30 



spring mav give rise to 319 billion offspring and 3 trillion eggs in the 

 season. Hence the importance of the fact that Eachnea mexicana 

 (teosinte) pollinated by Zea indentata (yellow dent corn) gives rise to 

 a hybrid which is totally immune to attacks of these Aphids. This is 

 probably due to the fact that the leaves of teosinte are tougher and 

 with more serrate edges, and the sap of the plant is sweeter than that 

 of Zea indentata. 



UvARov (B. p.). 063op-b fltflTenbHOCTM M-fecTHbiXTi opraHMaauJM no 

 dopbet CTj BpeflMTeJlflMM B"b 1914 rofly. [Review of the Work of 

 local Organisations for the Control of Pests in 1914.] — ^« CejlbCKOe 

 XoSflilCTBO M Jl'feC0B0flCTB0.» {^Agriculture and Forestry], Petro- 

 grad, ccliii, January- February 1917, pp. 131-151. [Received 

 16th November 1917.] 



In 1910 there were only four Entomological Organisations in Russia 

 (Simferopol, Kherson, Kharkov and Kiev), while in 1914 their number 

 had increased to 21 permanent stations and bureaus, in addition to 

 which entomological branches existed at five Agricultural Experiment 

 Stations and in some Governments entomological work of a temporary 

 nature was carried on. The total number of persons holding permanent 

 appointments in the 21 establishments was 58, the staff usually 

 including also a few temporary assistants engaged for the summer 

 months. No exact data are available as to the cost of the local 

 organisations, but they may be assumed to average £600-£700. 

 Investigations on the local fauna and flora formed an important part 

 of the work of the local organisations. In the majority of cases these 

 were carried out by members of the staff and in some districts special 

 observation points were established. 



The author advocates the expansion of the latter type of investiga- 

 tions, as giving full and precise data on the life-history of a given 

 pest. The stations and bureaus also collect information on pests and 

 injuries to plants by means of a more or less developed system of local 

 correspondents, in which respect special mention must be made of the 

 Poltava Bureau, which in 1914 had no less than 597 correspondents. 



The entomological organisations also conducted investigations on the 

 pests specially injurious and dangerous in their respective districts 

 and made experiments with various remedies and insecticides. Their 

 practical work consisted in popularising knowledge of pests and their 

 control by means of posters, pamphlets, lectures and demonstrations, 

 in organising hiring stations for sprayers, etc., in replying to inquiries 

 and generally advising the population, and, in some cases, in active 

 participation in the campaign against various pests, of which large 

 outbreaks occurred. 



ycTae-fa H)iKHO-PyccKaro 3HTOMOJiori44ecKaro OdmecTsa. [The 

 Foundation of the South Russian Entomological Society], Odessa, 

 1917, 7 pp. 



The South Russian Entomological Society was founded in April 

 1917, for the purpose of studying theoretical and apphed entomology. 

 The headquarters of the Society is at Odessa, the President being 

 Prof. D. K. Tretiakov and the Secretary Mr. A. V. Anutchin. The 

 Society invites kindred organisations in other countries to conununicate 

 with it with a view to arranging an exchange of publications. 



