58 



Bertrand (G.), Brocq-Rousseu & Dassonville. Destruction du 

 Charangon par la Chloropicrine. — C. R. hebdom. Acad. Sci., Paris, 

 clxix, no. 19, 10th November 1919, pp. 880-882. 



Experiments here described show that chloropicrin is a valuable 

 agent in the destruction of Calandra oryzae, L., in stored grain. The 

 method of application recommended is to spray the bags of grain with 

 I to f oz. of chloropicrin, after which they should be left in a closed 

 place for about 20 hours at a temperature of from 50° to 55° F. After 

 this treatment the dead insects may easily be eliminated by means 

 of a winnowing machine and the grain fed to animals. This method 

 also insures destruction of the weevils that have migrated from the 

 grain to the floor, walls, etc. 



Bertrand (G.), Brocq-Eousseu & Dassonville. Influence de la 

 Temperature et d'autres Agents physiques sur le Pouvoir insecti- 

 cide de la Chloropicrine. — C.R. hebdom. Acad. Sci., Paris, clxix, 

 no. 22, 1st December 1919, pp. 1059-1061. 



The insects used for these experiments were chiefly grain pests. 

 The observations described show that the insecticidal properties of 

 chloropicrin are accelerated by a rise in temperature though the 

 humidity of the atmosphere and the presence or absence of light do 

 not influence its insecticidal powers in any way. 



The Pine Tree Aphis {Chermes pini). — Agric. Gaz. N.S.W., Sydney, 

 XXX, no. 10, October 1919, p. 742. 



Chermes pini, Koch, is reported on Pinus insignis from the north 

 coast of New South Wales, and attention is therefore drawn to the 

 necessity of dipping young trees in kerosene emulsion before they are 

 planted out. 



Jackson (Miss D. J.). Notes on the Aphides of Ross-shire, with 

 Descriptions of two Species new to Science. — Scottish Naturalist, 

 Edinburgh, April 1918, pp. 81-91, 1 plate, 2 figs. [Received 12th 

 December 1919.] 



The species dealt with include : Macrosiphum jaceae, L., on thistle 

 {Carduus sp.) in August ;• M. scabiosae, Schr., on scabious in August ; 

 M. hieracii, Kalt., on hawkweed (Hieracium sp.) in August ; 

 M. sonchi, L., on sowthistle in August ; M. kaltenbachi, Schout., and 

 M. lactucae, Schr., on endive in August, the latter being attacked by 

 Cecidomyid larvae and a fungus, Empusa aphidis ; M. dirhodum, Wlk., 

 on oats in August ; Amphorophora viciae, Kalt., on broad bean and 

 Vicia sativa in July ; Rhopalosiphum dianthi, Schr., on cabbage, 

 turnips and swedes in August ; R. lactucae, Kalt., on sowthistle in 

 August ; Cavariella capreae, F., on willow in August ; Brevicorym 

 (Siphocoryne) brassicae, L., on turnips and swedes in August ; 

 is. xylostei, Schr., on honeysuckle (Lonicera) in August ; Hyalopterus 

 pruni, F., on leaves of plum trees in July, being parasitised by a Chalcid 

 and preyed upon by Cecidomyid larvae ; Aphis idaeus, v.d.Goot, 

 on raspberry shoots in July ; A. kochi, Schout., on apple leaves in 

 July ; A. hederae, Kalt., on ivy in July ; A. chaerophylli, Koch, on 

 Chaerophyllum in August ; Siphonaphis (A.) padi, L., on leaves of 



