268 EXPERIMENT STATION RECORD. 



The elm leaf beetle, A. F. Burgess I Ohio Dept. Agr., Div. Nursery and Orchard 

 Inspection Bui. 4, ]'/>■ 23, figs. 10). — This insect has recently appeared in injurious 

 numbers in Dayton and other parts of Ohio. Notes are given on its distribution in 

 various parts of this country and the habits, life history, food plants, natural enemies, 

 and remedies for combating it, On account of the extremely dangerous character of 

 this pest it is urged that effective insecticide remedies be put in operation against it. 



The cocoanut beetle (Bot. Dept. [Trinidad'], Bui. Misc. Inform., 1905, No. 4-5, pp. 

 158-160). — Brief notes are given on the habits and life history of Rhyncophorus pair 

 ma mm. The beetle attacks many species of palms, but is most injurious to Acrocomia 

 lasiospatha. In combating this pest the adults should he captured and destroyed as 

 fast as possible and the decayed material of cut trees should be destroyed or treated 

 so as to kill the larva 1 . 



Thrips and black blight, 11. A. B alloc (Bot. Dept. [Trinidad], Bui. Misc. Inform., 

 1904, No. 44, )>p. 132-135). — As a result of the study of this problem the author con- 

 cludes that black blight causes an unsightly appearance of cacao, but is comparatively 

 harmless. The scale insects which may precede the appearance of black blight are 

 far more injurious, but may be controlled by the application of proper insecticide 

 treatment. A number of instances are cited of the injury due to the cacao thrips 

 (Physopus rubrocinctus). 



The sheep maggot fly ( Bd. Ayr. and Fisheries [London'], Leaflet 126, pp. 3, figs. 3). — 

 Lucilia sericata is described in its different stages and notes are given on its life his- 

 tory and depredations on sheep. In combating this pest it is recommended that 

 infested sheep be isolated, carcasses destroyed, and affected sheep be treated with 

 kerosene and sulphur. 



Preparation and use of sprays; spray calendar, W. Stuart ( Vermont Sta.Bul. 

 113, pp. 95-108). — General directions are given regarding the principles of spraying 

 for the control of insect and fungus pests, together with formulas for preparing Bor- 

 deaux mixture, copper sulphate solution, ammoniacal copper carbonate solution, for- 

 malin, Paris green, arsenate of lead, arsenite of soda, hellebore, kerosene emulsion, 

 lime-sulphur-salt wash, pyrethrum, etc. A spray calendar is appended to the 

 bulletin. 



Electrical destruction of animal life ( West Electrician, 36 (1905), No. 5, pp. 88, 

 89, figs. 2). — An apparatus is described by which an alternating current of high volt- 

 age and low amperage can be passed through the bark of trees or through soil 

 infested with insect or other harmful animal pests. It is claimed that these pests 

 may be destroyed by the electric current. 



The unimportance of the influence of stimulating food upon the egg lay- 

 ing of queen bees, Sylviac (Apicutteur, 49 (1905), No. 4, pp. 149-155). — As the 

 result of a long-continued study of this subject the author comes to the conclusion 

 that the rapidity and extent of egg laying on the part of queen bees is not greatly 

 influenced by stimulation in the way of artificial feeding, but is determined largely 

 by other well-known causes. 



Regeneration of the thoracic feet of the silkworm, E. Verson (Atti R. 1st. 

 Veneto Sci., Let. "I Arti, 64 (1904-5), No. 2, ]>/>. 429-469).— The literature relating to 

 this subject is briefly discussed and detailed notes are given on the special anatomical 

 features of the thoracic legs of silkworms, with particular reference to regeneration 

 processes as observed in these structures. 



External characters which indicate sex in larvae of the silkworm, E. Ver- 

 son (Atti R. 1st. Veneto Sci., Let. ed Arti, 64 (1904-5), No. 2, pp. 497-501, figs. 2).— 

 The author describes the structures which may be observed in the larva 3 of the silk- 

 worm and which may be depended upon in classifying these larvae according to 

 their sex. 



