ECONOMIC ZOOLOGY — ENTOMOLOGY. 785 



deaux mixture it is necessary thai the lime be capable of combining chemically with 

 the copper sulphate; 



One satisfactory method of making Bordeaux mixture was found to be to have 



three barrels emptying l>y a faucet into a com a trough connecting \\ ith the spray 



tank, [none barrel 1"> lbs. of copper sulphate is dissolved in 50 gal. of water, in the 

 second from I s to 20 lbs. "new process" lime is dissolved in the same manner, 

 while the third barrel is (ille<l with clear water. A.fter the contents of the barrels 

 have been thoroughly agitated all three barrels are opened and the materials flow 

 together into the spray tank. In these experiments it was found that prepared 

 limes c.»st Bomewhat more than st<.ne lime but they possess an advantage in that all 

 the material could be used, while this is not true with ordinary -t< lime in barrels. 



The insect pests of cotton, II. A. Ballou ( West Indian Bui, 6 (1906 

 />/>. 128-129). — In this article the author discusses tin- habits, life history, and the 

 medial measures against cotton worm, red maggot, Eriophyes gossypii, and other 

 cotton pests. 



The cotton red spider, E. 8. <i. Tins i U. S. Dept. Agr., Bur. Ent. Circ. 65, pp. 

 5,figs. /i. -TetranychuB gloveri causes injury to the cotton plant by feeding chiefly 

 on the underside of the leaves, but occasionally attacks all parts of the plant. While 



Under the leaves the mites arc protected by a loose web. 



The life history and means of distribution of this pest are briefly indicated. Sev- 

 eral species of predaceous insects prey upon the mites and their eggs. The cultural 

 methods of control of the pest include rotation of crops, destruction of cotton stalk-, 

 deep plowing, and burning and destruction of weeds and rubbish. For Bpraying 

 infested plantations the author recommends the use of sulphur, lime-sulphur wash, 

 lye-sulphur wash, or kerosene emulsion. 



Insect enemies of tobacco in Hawaii, D. L. Van Dine I Hawaii Sta. Bui. 10, 

 />/>. 16, figs. '/>.— Notes are given on the habits, life history, and means of combating 

 the more important insect pests of tobacco in Hawaii, including cutworms, tobacco 

 flea beetle, Phthori msea operculella., false budworin, tobacco hornworm, Adoretus 

 wmbrosus, and cigarette beetle. Notes are given on the occurrence of these peats and 

 remedies suggested which are suited to Hawaiian conditions. 



Review of the insect pests affecting- sugar cane, H. A. Ballou i West Indian 

 Unl., 6 I W05), No. 1, pp. 37-47). — In this article a concise summary is given of 

 known facts regarding some of the most injurious pests of sugar cane, including 

 JHatrsea saccharalis, Sphenophorus sericeus, Diaprepes abbreviatus, Castnia licus, and 

 other pests. Recommendations were made regarding the most effective method- for 

 controlling these insects. 



The joint-worm, F. M. Webster ( U. S. Dept. Agr., Bur. Ent. Oirc. 66, pp. 5, 

 ti<i*. .-(.-This pest occurred in great numbers in 1905, particularly in Indiana and 

 Virginia. The insect is described in its different stages to assist in its recognition. 

 No direct and effective remedies are known. Cultural methods for use in reducing 

 the ravages of the pest include the use of fertilizers, thorough cultivation, burning 

 stubble, and rotation of crops. 



The cottony grass scale, Edith M. Patch (MaineSta. Bui. 121, pp. 169-180, pis. 

 .'). — The cottony grass scale ( Eriopeltis festucx) did not attract much attention until 

 L904, when it occurred in large numbers and caused extensive injury to grass lands. 



It was noticed in 1905 that the insect had spread very rapidly in localities where 

 infestation was observed during the previous year. The number of eggs in each sac 

 18 600 to 700, and under favorable conditions it is apparent that the pest may mul- 

 tiply rapidly. The insect is held in check to some extent by unfavorable weather 

 conditions, the prevalence of rust upon grasses, predaceous insect-, overcrowding, 

 and parasites, since the insect pastes the winter in the egg Btage attached to grass 

 blades above ground, it is a simple matter to control it by burning infested grass 



