766 EXPERIMENT STATION RECOED. 



J. F. Annand {Quart. Jour. Forestry, 5 {WW), No. 3, pp. 203-221, pi. 1, figs. 

 3). — The main object of this paper is said to be that of bringing to the notice 

 of landowners and others interested some suggestions for dealing with the 

 infested woods which it is thought will admit of practical application. 



The insect fauna of grouse moors, P. H. Grimshaw {Ann. Scot. Nat. Hist., 

 WIO, No. 15, pp. Ilt9-162). — An annotated list of species collected in English 

 grouse moors. 



Practical measures for the prevention of ticks in Jamaica, H. H. Cousins 

 {Bia. Dept. Agr. Jamaica, n. ser., 1 {1910), No. 3, pp. 198-204, pi. 1). — This is 

 a discussion of the methods applicable in the destruction of ticks in Jamaica. 

 A combination of paranaph, which is a soluble kerosene emulsion, and an 

 arsenical preparation, is recommended as a spray. 



Paranaph, which was first prepared by the author, is made as follows: "To 

 56 lbs. soft soap add 2 gal. of water. Simmer over a fire with constant stirring 

 until all lumps have disappeared, and perfectly uniform melt has been obtained. 

 Add 6 lbs. of crude naphthalene. Stir until dissolved. Remove the fire and add 

 2 imperial gallons of ordinary kerosene oil. Stir until uniform. The finished 

 product is semisolid and dissolves readily in cold water so as to give a milky 

 emulsion." It is said to be an eflicient tick wash when used alone in the pro- 

 portion of 1 qt. to 4 qts. of water, and that when combined with an arsenical 

 and applied in the state of proper mixture in an efficient manner, this wash 

 will kill every tick on the animal treated. The formula recommended is : 

 Paranaph 1 pt. or 20 oz.. Cooper's dip 1 oz., water 3 qts. 



The fowl tick, C. W. Howard and R. Bouklay {Transvaal Dept. Agr., 

 Farmers' Bui. 61, pp. 8, pis. 2). — Popular accounts are given of Argas persicus. 



A list of the ticks of South. Africa with descriptions and keys, C. W. How- 

 ard {Transvaal Dept. Agr., Farmers' Bui. 30. pp. 96, pis. iO).— Previously noted 

 from another source (E. S. R., 20, p. 857). 



[Injury by the grapevine mite], J. Burnat and P. Jaccard {Rev. Yit., 31 

 {1909), Nos. 195, pp. 251-261; 196, pp. 289-292, figs. ,>).— An account of injuries 

 to the vine by Phylloeoptes vitis. 



A contribution to our knowledge of insecticides, C. T. McClintock et al. 

 (Rpt. Mich. Acad. Sci., 10 {190S), pp. 191-206, chart i).— The results of the 

 investigation on contact insecticides here reported have been summarized as 

 follows : 



•'The insecticldal, germicidal, and toxic values (for higher animals) have 

 little or no correlation. It is possible to determine the relative strength or 

 value of insecticides by immersing test insects in definite strengths of the insecti- 

 cide, and noting the time required to produce death. The common bedbug 

 {Cimcx Icctularius) appears to be the most satisfactory test insect. As yet 

 the mode of action, the way in which the contact insecticides cause the death of 

 the insects, has not been determined. Apparently the fewer the number of 

 spiracles, the smaller their size, and the better they are guarded by hairs or 

 valves, the more resistant is the insect to the contact insecticides. Chemical 

 standardization of this class of insecticides is. with our present knowledge, im- 

 possible. With 2 substances, having essentially the same chemical composition, 

 the insecticldal values may vary enormously. Even the same substance, pre- 

 pared with what are apparently unimportant chemical variations, gives widely 

 different insecticldal values." 



Analyses of samples of arsenate of lead, P. R. Scott {Jour. Dept. Agr. Vic- 

 toria, 1 {1909), No. 12, pp. 153-156). — Analyses of 15 samples of arsenate of 

 lead obtained from various sources by the gQvernmeut analyst and chemist for 

 agriculture are reported. 



