10101 ECONOMIC ZOOLOGY — ENTOMOLOGY. 59 



A tachinid {Unnaemyia oomta) and an ichneumonid (Enicospilus purgatus) 

 were reared from larvae collected at Raton Rouge, and Sarcophaga hclicis is 

 thought to have been so reared. Dead larvffi infested with the fungus Bn- 

 tomophthora virescens were found in rearing cages. Experiments with methods 

 of control indicate that the use of poisoned baits and the treatment of attacked 

 plants with arsenlcala will prove satisfactory. A mixture made of bran 10 

 lbs , molasses 1 qt., Paris green 0.5 lb., water 7 qt., and the juice and finely 

 chopped rind and pulp of two oranges is said to have given satisfactory results. 



III. Experiments in controlling the tomato fruit worm with arscnicals (pp. 

 15-19). — The details of dusting and spraying experimeats at Raton Rouge for 

 the control of the tomato fruit worm or bollworm extending over a period of 

 two years are presented in tabular form. The results show considerable varia- 

 tion, and none of the treatments reduced the injury profitably. Arsenate of lead 

 applied undiluted as a dust gave the best results. 



Measures for protecting wheat-flour substitutes from insects, R. N. Chap- 

 man (Science, n. ser., 4~ (1918), No. 1224, PP- 579-581).— This is a discussion of 

 work being done by the University of Minnesota in cooperation with the State 

 Food Administration to prevent the loss of wheat flour substitutes from insect 

 attack. Attention is called to the fact that the amount of embryo included in 

 the flour and the coarseness of the product are usually taken as an index of 

 susceptibility to insect attack, coarse flours with the most embryo being the 

 most susceptible. The wheat flour substitutes and other cereals contain em- 

 bryo, are relatively coarse, and are known to be highly susceptible to insect 

 attack. 



The measures recommended, which are preventive, consist in subjecting the 

 sealed packages to a temperature of about 85° C. (185° F.) at the time of 

 packing, which will kill all stages of insects, rapid handling of cereals and 

 proper sanitation of stores by retail dealers, and the subjecting of the cereal 

 in the home to temperatures such that the minimum in any part of the cereal 

 is well above the fatal temperature of insects, or about 45° C. (113° F.) at 

 24 per cent of relative humidity. 



The consumption and cost of the economic poisons in California, 1916, 

 G. P. Gray (Mo. Bui. Cal. Com. Hort., 7 (1918), No. 3, pp. lJ,0-l>,J t ).—A table 

 showing the consumption and cost of economic poisons in 1916 in 28 counties 

 reporting is included in this paper. 



The selection of petroleum insecticides from the commercial point of view, 

 P. R. Jones (Mo. Bui. Cal. Com. Hort., 7 (1918), No. 4, pp. 189-191).— A brief 

 discussion. 



Wettable sulphurs, G. P. Gray (Mo. Bui. Cal. Com. Hort., 7 (1918), No. 4. 

 pp. 191, 192). — Attention is called to the fact that a number of substances, such 

 as soap, flour paste, oleic acid, glue, dextrin, diatomaceous earth, etc., when 

 mixed with sulphur commonly counteract its aversion to water but do not 

 otherwise modify its properties. The author recommends the following formula 

 in the preparation of wettable sulphur: Powdered glue 1.5 oz., hot water 3 

 gal., sublimed or powdered sulphur 10 lbs., and water to make 200 gal. Since 

 sulphur is apt to cause foliage injury during hot, dry weather, it is generally 

 advised not to apply sulphur or sulphur pastes to plants when the temperature 

 exceeds 100° F. 



On two species of Physothrips injurious to tea in India, R. S. Ragnalt, 

 (Bui. Ent. Research, 9 (1918), No. 1, pp. 61-64, figs. 2).— Two species of thrips 

 found on tea in sufficient numbers to be regarded as pests are P. setiventris n. 

 sp. and P. lefroi/i. 



A study of the capsid bugs found on apple trees, F. R. Petherbridge and 

 M. A. Husain {Ann. Appl. Biol., 4 (191S), No. 4- PP- 119-205, pis. 8).— This is a 



