ENTOMOLOGY. (^63 



value of hydrocyanic-acid gas as a remedy for the black currant bud 

 mite. Two thousand infested currant bushes were tied in bundles, 

 placed in a heap on the ground, and the whole covered with water- 

 proof cloth. In a small vessel in the center of the heap of bushes the 

 author placed 100 cc. of water, an equal quantit}' of strong- sulphuric 

 acid and 36 gm. of 98 per cent C3"anid of potash. After 1 hour the 

 cloth was removed and a microscopical examination failed to show 

 any living mites or eggs. The bushes were subsequently planted out 

 and kept under observation. At present indications point to a complete 

 destruction of the mite. Successful results with the same treatment 

 were also obtained with large bushes planted in the field. The author 

 believes the results of his experiments should encourage fruit growers 

 to make a thorough trial of fumigation with h3'drocyanic-acid gas for 

 such insect pests as do not yield to ordinary treatment. Brief sugges- 

 tions are given concerning the application of this method to green- 

 houses and against the mealy bug and other insect pests. 



An historical account of apiculture in connection -with its fate in Siberia 

 and Transbaikal, A. Kuznetzov {latoriclieakn ocherk pchclovodstva v myazi .s sudboyu 

 ego V Sibiri i Zabaikalye. Chita: 1899, pp. IS; rev. in Sehk. Khoz. i Lyeifov, 196 {1900), 

 Jan., pp. 191, 192). — In Siberia apiculture has undergone its greatest development in 

 Altai. Detailed accounts are given by the author of the conditions which are favor- 

 able to the rearing of bees and upon the connection of this industry with fruit raising. 



The migration of insects, K. Sajo (Prometheus, 10 {1900), Nos. 515, pp. 737-741; 

 516, pi>. 758-761, figs. 9; 517, pp. 770-772, fig. 1; 518, pp. 785-789; 519, pp. 802-806; 

 620, pp. 817-821) . — The author presents a general discussion of the means of distri- 

 bution of insects with special reference to their larger migratory movements. The 

 cHmatic and other conditions which may in any way influence such movements of 

 insects are also considered. Among the species to which special attention is given 

 mention may be made of Blissus leucopterus, B. doria:, Barw scolopacea. Phylloxera vas- 

 tatri.r, Otiorrhynchus ligustici, Porthetria dispar, Cheimatobia brumata, Vatiessa cardui, 

 species of Pieris, and Pachytylus niigratorius. 



Experimental proof of the mosquito malaria theory, P. Manson {British Med. 

 Jour., 1900, No. 2074, PP- 949-951, figs. 2). — An experiment was tried in imj)orting 

 mosquitoes from Italy which had sucked the blood of malarial patients. These mos- 

 quitoes were allowed to puncture the skin of the hand with the result that a typical 

 case of malarial fever developed. A wooden hut, constructed in England, was shipped 

 to Italy and placed in a locality which was ascertained to be intensely malarial. Five 

 persons entered on a residence in this hut early in July. On Sejitember 21, when 

 the last report was made, no case of malaria had developed among the experiment- 

 ers, although the neighbors were all suffering from malaria or had had attacks. For 

 the control of malaria the author recommends the drainage of the l)reeding pools of 

 Anopheles and protection from mosquito bites. 



The relationship of drinking wrater, -water logging, and the distribution 

 of Anopheles mosquitoes, respectively, to the prevalence of malaria north of 

 Calcutta, L. Eogers {Proc. Asiatic Soc. Bengal, 7 {1.900), July, pp. 90-98). — The 

 author, while admitting the agency of mosquitoes in transmitting malaria, believes 

 that a total destruction of mosquitoes, even in a small area, is practically impossil)le. 



The kissing bug, P. J. Parrott {Indv8triali.'it,27 {1900), No. 1, pp. 1-4, figs.. 3). — 

 Notes on the more common species of bugs in Kansas which have received this pop- 



