1160 EXPERIMENT STATION EECORD. 



Fumigation with cyanid of potassium for white fly, H. L. Hutt (Ann. h'i)t. 

 Ontario Agr. Col. and E.vpt. Farm, 33 (1907), pp. 1 ■'>(), 151).— \\\ greenhouses 

 with the ordinary miscellaneous collection of plants it was found that fumiga- 

 tion could be accomplished without injury to -the plants and with good results 

 in the destruction of white fly and other greenhouse pests when the gas was 

 evolved from a mixture of I oz. cyanid of potash, A oz. of sulphuric acid, and 

 1 oz. of water per 1,000 cu. ft. of space. 



Paris green, C. D. AVoods and H. H. Hanson {Maine /?/a. Bui. lo'i, pit. 109- 

 US). — Samples of Paris green offered for sale in Maine were analyzed and 

 found to contain in nearly all cases the requisite amount of arsenic. In a few 

 samples the arsenic was not all combined, but showed too high a percentage 

 of soluble arsenic. Small quantities of sodium sulphate and sand were observed 

 as incidental impurities in samples and in a few cases the water content was 

 rather high. Examination for the purpose of determining the relative fineness 

 of the material showed that the particles of I*aris green in the samples exam- 

 ined were quite uniform in size and regularly rounded. Formulas are given for 

 the preparation of Paris green as a spray either alone or in combination with 

 Bordeaux mixture. 



On the bionomics of certain calyptrate muscidae and their economic sig- 

 nificance, with especial reference to flies inhabiting houses, C. G. Hewitt 

 {Jour. Ecoti. Bio]., 2 {1907), No. 3. pp. 7.9-88).— In the group of calyptrate 

 muscidiv are found a number of beneficial parasitic species and also some of the 

 most annoying and injurious species of flies, including tsetse flies, the common 

 house fly, etc. Attention is called to the biology and economic importance of 

 these S])ecies. 



Tsetse flies, F. Stuhlmann {Arb. K. Gfindhtsamt., 26 {1907), No. 3, pp. 

 301-383, pis. 4, figs. 28). — A detailed study was made of the appearance, habits, 

 and life history of Glossina fusca and G. tachinoides. The' various features 

 of the internal and external anatomy of these insects are described in detail, 

 particular attention being devoted to those anatomical structures which may 

 bear upon the transmission of disease by the insects in question. From labora- 

 tory experiments it appeared that tsetse flies require more food in a dry air 

 than in a moist air. The author considers that there is more prospect of prac- 

 tically controlling trypanosome diseases in animals by efforts directed toward 

 the destruction of the trypanosomes in affected animals than by attempts to 

 eradicate the flies. 



Ox warble flies, D, Turner {Agi\ Students' Gaz., n. scr., 13 (1907), No. 5, pp. 

 I'll-lJ/'i). — Attention is called to the great damage annually caused by the ox 

 warble fly. The extent of infestation of these pests has been somewhat reduced 

 in all localities where cattle have been systematically greased with a mixture 

 intended to prevent the adult flies from laying their eggs. 



Notes on ticks, C. Warburton {Jour. Econ. Biol., 2 {1907), No. 3, pp. 89-95, 

 jil. 1). — An analytical table is presented for the identification of the genera of 

 Ixodidfe and Argasidiie. Notes are also given on some of the more important 

 species of these families. 



Agriculturally important ticks in Africa, W. Donitz {Die u-irtschaftlich 

 iciclitigcn Zeelccn mit hcsonderer Beriicksichtignng Afrikas. Leipsic, 1907, pp. 

 V+127, pis. 6). — A great variety of ticks infest domestic animals in Afi'ica. 

 The author has, therefore, undertaken to present a systematic and economic 

 account of these pests. The general anatomy and life history of ticks is de- 

 scribed and a statement is given of the systematic arrangement of species. 

 Particular stress is laid upon those species of ticks which cause serious annoy- 

 ance and loss of condition to domestic animals or are concerned in the trans- 

 mission of diseases. 



