484 EXPERIMENT STATION RECORD. 



Further breeding experiments are being carried on to determine some of the 

 doubtful points in the life history of mosquitoes. Estimates made by reliable 

 engineers indicate that a thorough and satisfactory scheme of drainage can be put in 

 operation in mosquito-ridden localities for comparatively small outlays. 



Department of entomology, E. D. Bali. ( Utah Sta. Rpt. 1903, pp. XXVIII- 

 XXXII). — Notes are given on the progress of the author's work in combating cod- 

 ling moth, especially a commercial test of spraying for this insect which has been 

 undertaken but is not yet complete. In these experiments Paris green is used 

 without the addition of lime. 



An investigation was also made of the grasshopper situation, particularly in San 

 Pete and Sevier counties, where it was found that large numbers of grasshoppers had 

 been caught by means of the "ballooning" method for bounty. At the town of 

 Chester 46,42i> lbs. of grasshoppers were received for bounty. An estimate of the 

 number of grasshoppers in the masses which were received was made with the result 

 that a ton of grasshoppers is believed to contain '.VI, 000,000 individuals. Brief notes 

 are also given on tent caterpillars. 



About some injurious insects, S. Onuki and H. Nakagawa {Imp. Agr. Eocpt. 

 Sta. Japan, Bui. SO, pp. 152, pis. 14)- — This bulletin is accompanied with an English 

 abstract of 11 pages in which the main points are summarized. The authors present 

 biological and economic notes on a considerable number of miscellaneous insects 

 injurious to rice, pear, mulberry, and tea. Experiments were also carried on with 

 insecticides. 



It was found that Lema flaviceps, a leaf-eating beetle injurious to rice, could be 

 destroyed in the larval condition by dusting with a mixture of 1 part pyrethruin to 4 

 parts lime. The adult insects, however, were not affected by this treatment. Good 

 results were also obtained in controlling this insect by the use of Paris green and 

 kerosene. Various insecticides were tested on a species of sawfly, which is injurious 

 to the common rush used in making mats. Pyrethrum and lime proved effective in 

 destroying this species. It was also found that the larva' could be destroyed by 

 burying them in mud at a depth of 5 to 8 in. 



The woolly aphis was effectively exterminated by a treatment during winter with 

 kerosene of the strength of 5 per cent. In the experiments of the authors the jiear- 

 tree psylla Was most easily destroyed by a mixture of kerosene and water at the rate 

 of 1 to 15. 



Reports on economic zoology, F. V. Theobald (Jour. Southeast. Agr. Col., Wye, 

 1904, No. IS, pp. 11S-1S5, ph. 10, figs. 16). — An account is given of the life history 

 and habits of various ticks with especial reference to their agency in spreading 

 malignant jaundice in dogs, heart water in sheep, Texas fever in cattle, and louping 

 ill in sheep. 



An elaborate discussion is also given of the insect pests of the raspberry with notes 

 on their habits and life history and the means of preventing them. Attention is also 

 called to certain birds which feed upon this fruit. The author discusses briefly some 

 of the results thus far obtained from the use of lime-sulphur-salt wash and recom- 

 mends a formula containing 40 lbs. lime, 20 lbs. sulphur, and 15 lbs. salt per 50 gal. 

 of the wash. The animal pests of forest trees are discussed in considerable detail 

 with especial reference to the insects injurious to ash, alder, aspen, beech, birch, and 

 horse-chestnut. 



The beetles of Central Europe, L. Ganglbauer (Die. Kdfer von Mitleleuropa . 

 Vienna: Karl Gerolds Son, 4 (1904), pt. 1, pp. 286, figs. 12). — The author continues 

 his monograph on the beetles of Central Europe giving analytical keys for the deter- 

 mination of species and detailed descriptions of species, with brief notes on their 

 occurrence and habits. The families considered in this part of the author's work 

 are Dermestida?, Byrrhidae, Nosodendrithe, Georyssidse, Dryopida^, Heterocerida?, and 

 Hydrophilidse. 



