354 EXPERIMENT STATION EECORD. 



Various insects affecting- nut trees, H. A. Gossaed (Amer. Fruit and "Nut 

 Jour., 7 (1913), No. 99, pp. Ji-ll, 19, figs. i7).— This article is based upon the 

 investigations previously noted (E. S. R., 17, p. 479). 



Injuries following the application of petroleum or petroleum products 

 to dormant trees, E. P. Felt (Abs. in Jotir. Econ. Ent., 6 {1913), No. 2, pp. 160, 

 161). — This is an abstract of a paper presented by the author before the Ameri- 

 can Association of Economic Entomologists in which attention was called to 

 injuries following the application of miscible oils. The author believes that 

 there is less danger of penetration by oil and consequent injury if the applica- 

 tions are made in the spring shortly before active growth begins. 



The effects of oil insecticides on citrus trees and fruits, W. W. Yothebs 

 (Jour. Econ. Ent., 6 (1913), No. 2, pp. 161-165).— This is a rei»ort of observa- 

 tions made in connection with investigations carried on in Florida. 



It is pointed out that the use of sulphviric acid, which was found in one brand 

 of miscible oil to the extent of 2* per cent, should be avoided, as should the use 

 of rosin or rosin oil. Attention is called to the fact that while oil sprays made 

 without injurious chemicals and used properly cause no immediate damage and 

 never any serious injui-y, they apparently interfere to a limited extent with the 

 formation of the chlorophyll. 



The success of a two-spray calendar in a Kansas orchard, H. B. Hungeb- 

 FORD (Jour. Econ. Ent., 6 {1913), No. 2, pp. 165-113, figs. S).— This is a report 

 of spraying experiments carried on in a Kansas orchard during 1912. 



The destruction of the locust by its natural enemies, A. GALnABDo (An. 

 Mtts. Nac. Buenos Aires, 23 {1912), pp. 155-165). — ^A brief discussion of Sarco- 

 phaga caridei and Idi<i fasciata as locust parasites and of work carried on with 

 Coccohacillus acridiorum in combating Schistocerca parenen-sis, an account of 

 which has been previously noted ( E. S. II., 27, p. 357 ) . 



Notes on tree crickets, P. J. Parrott and B. B. Fulton {Jour. Econ. Ent., 

 6 {19 IS), No. 2, pp. 177-lSO, figs. 15).— This article calls attention to the 

 ovipositing habits of (Ecanthus niveus, O. nigricornis, and O. q-uadripunctatus, 

 which are the most common species in plantings of small and tree fruit in 

 New York. 



New Thysanoptera from Florida, J. R. Watson {Ent. News, 24 {1913), 

 No. Jf, pp. 145-1J/8, pi. 1). — Cryi)tothrips floridensis n. sp. is reported to have 

 been quite numerous on the twigs of camphor seedlings {Cinnamon camphor) 

 at Satsuma, Fla., in November and December, and the source of considerable 

 damage. 



The false tarnished plant bug- on pears, P. J. Paeeott and H. E. Hodgkiss 

 {N&iv York State Sta. Circ. 21, pp. 4j pl- 1, fiffs. 6). — A brief description of this 

 pest with directions for its control in pear orchards. 



Peach " stop back " and tarnished plant bug (Lygus pratensis), L. Hase- 

 MAN {Jour. Econ. Ent., 6 {1913), No. 2, pp. 237-2^0) .—The author reports that 

 during the past 2 years he has found the injury to peach trees in Missouri, com- 

 monly spoken of as " stop back," to be caused by the tarnished plant bug. 



The apple leaf hopper (Empoasca mali), L. Haseman {Jour. Econ. Ent., 

 6 {1913), No. 2, pp. 24O-243). — A report of observations made in Missouri during 

 the past 2 years. 



Fall spraying for the pear psylla, H. E. Hodgkiss {Jour. Econ. Ent., 6 

 {1913), No. 2, pp. 243, 2^4).— The author states that success attending the fall 

 spraying of pear orchards for the psylla depends upon (1) an understanding of 

 weather influences upon the activities of the hibernating adults; (2) the com- 

 plete wetting of each tree as the work proceeds; and (3) thorough work in 

 spraying. 



