170 



(2) For temperatures higher than 0° C. up to the temperature of the 

 surrounding air, the apparatus of Headlee and the polythermostat | 

 of the Poltava Experimental Station, constructed by N. V. 

 Kurdjumov at a cost of only £8, are described. 



(3) For temperatures higher than the surrounding air, the 

 jno&t remarkable apparatus is that of Tower, which cost the 

 enormous sum of £25,000 and permits the cUmate of Mexico to be 

 reproduced in Chicago. Other apparatus of this type are the soil 

 thermostat of Tower ; the apparatus of the Tula Entomological 

 Station, suitable for work not requiring great precision and costing 

 about £5 ; the thermostat of Schribaux-Koux and that of the Charkov 

 Experimental Agricultural Station (of the Entomological Department 

 of which the author is the Director). 



The hygrostats described are : the soil box of Graf, the thermo- 

 hygrostat of Headlee and that of Tower. An account is given of 

 the methods in use at the Stations of Tula and Charkov. 



KiTCHUNOV (N.). rieKaHli H ero Ky/lbTypa. [Pecan-nut trees and 

 their cultivation.] — « Cafl"b M OropOA'b.» [Orchard and Market- 

 Garden], Moscow, xxxi, nos. 7, 9, 10 & 11. July, September, 

 October & November 1915, pp. 283-290, 383-392, 421-425 and 

 448-452. [Eeceived 30th March 1916.] 



The author discusses the possibility of the cultivation of the pecan 

 nut in Southern Russia and gives full details on this point from 

 American sources for the benefit of Russian agriculturists. In America 

 the leaves of this tree are attacked by the caterpillars of Hyphantria 

 cunea, Proteopteryx deludana, Acrobasis nebidella, Catocala piatrix, 

 Catabapta viduata and Datana integerrima. Control measures consist 

 of spraying with Paris green or other arsenious substances. The 

 Longicorns, Oncideres cingulatus and 0. texana, injure the twigs and 

 branches, which are also injured by larvae of Elaphidion vUlosum, 

 and the caterpillars of Aegeria (Sesia) scitula; the latter may be 

 destroyed by introducing a hot wire into their burrows. The nuts 

 are damaged by Balaninus caryae, and may be fumigated with carbon 

 bisulphide. 



UmcH (F. W.). Notes on the South American locusts : Schistocerca 

 paranensis, Burm. — Bull. Dept. Agric. Trinidad & Tobago, Port- 

 of-Spain, xv, no. 1, 1916, pp. 15-16. 



Though Trinidad proper was not invaded by any swarms of 

 Schistocerca paranensis from Venezuela [see this Review, Ser. A, 

 iv, p. 92], a small one alighted on the island of Patos on 3rd November. 

 Poisoned bran mash was scattered at the rate of 8 lb. per acre and after 

 three days there were hardly any locusts left. An unexpected result 

 was the poisoning of numerous rats which infest the island. In another 

 paper on rat poisoning, the composition of the bait is stated to be : 

 Paris green or white arsenic, 2|- lb. ; bran (or coconut meal), 50 lb. ; 

 molasses, 4 quarts, and water, 5 gallons. 



The poison and the bran are mixed dry and then the well-mixed 

 molasses and water is added. Sufficient water is again added to make 

 a wet mash. The bait must be made up on the day of using. About 



