64 EXPERIMENT STATION RECORD. 



practicable for sj)raying wliole forests. Slaked lime aud water also 

 pivc j;()<>(l ri'sults, but several patent mixtures failed. 



Insecticides; C. H. Fern ald {Massachusetts Hatch Sta. Bui. 24, jyp. 

 i_ii),_Arseiiate of lead, arsenate of soda, and a mixture of Paris green 

 and lime were tested on tent caterpillars to learn their advantages as 

 insecticides. Arsenate of lead proved very satisfactory, as it remained 

 suspended in the water some time, and could readily be seen on the 

 leaves, which it did not injure, even at the rate of 25 lbs. to 150 gals, 

 of water. From 1 to 15 lbs. to 150 gals, of water is advised, the arse- 

 nate of lead to be produced by combining 29.93 per cent of arsenate of 

 soda with 70.07 per cent of acetate of lead, by weight. A recom- 

 mended formula is 4 ozs. of arsenate of soda aud 11 ozs. of acetate of 

 lead to 150 gals, of water, 2 qts. of glucose or molasses added to cause 

 the insecticide to adhere to the leaves. 



Arsenate of soda in proportions strong enough to kill caterpillars 

 had the effect of badly burning the leaves. 



Paris green and freshly slaked lime in equal parts did not injure the 

 leaves, even when 6 lbs. of each to 150 gals, of water was used, but 

 acted very slowly on the caterpillars. 



An infusion of the leaves of Jamestown weed ( Datura stramonium) 

 was tried as an insecticide against potato beetles, with negative results. 



Wintering bees in the ground, E. Leplae [Rev. Agron., 1S94, JSfo. i, 

 jip. Z-^*^). — This article contains some general remarks on apiculture, 

 and the details of some experiments on sheltering bees from the cold ot 

 winter by burying the hives in the earth. Holes were dug, the hives, 

 stocke<l with honey, placed in them, and the soil packed around them. 

 In the iirst experiment, 1890-'91, the bees died from insufficient food. 



In the subsequent trials in 1892-'93 and 1893-'94, more honey Avas 

 supplied and the result proved successful, a much smaller proportion 

 of the bees being found dead, after 3 months interment, than in the 

 hives that had wintered above ground. There appeared to be no 

 loss from suffocation. 



Bees and honey, H. Hovind and E. Hansen {Christiania: 1S94, pp. 424). 



Planting for honey, .1. H. Lahkauke {Bitral Canadian, 17, p. 137). 



Experiments in feeding silkworms, M. F. Lambert (Montpellier: C. Boehm, 1S94, 

 pp. i6').— One bnudrt'd worms of each of two races, ii Chinese (Pai-pi hnig Cliiau 

 Tsan) and a French (Cevennes), were used in the experiments, and fed on the same 

 kind of leaves. The French race consumed the greater amount of leaves hut also 

 produced more silk. 



The leaves of the ''Tonkin" mulberry compared with those of other varie 

 ties in regard to their value for feeding to silkworms, M. F. Lambert {Montpd- 

 Uer: V. Boehm, 1S93, pp. 35, dgm. 1. Extr. Ann. de I'licole Nat. d'Agric. de MontpeUiev).— 

 Two hundred silkworms were experimented with, 50 being fed ou "Tonkin" leaves 

 and 50 ou the leaves of each of three other varieties. The worms did not thrive so 

 well on the " Tonkin" diet, nor did the silk prove as much as that from the worms 

 fed on the other leaves. The " rose " mulberry gave the best results. 



Notes ou a few species of reared Coleoptera, F. M. Webster {Entomological 

 News, 1S94, May, pp. 140, 141).— BxM notes on 8 species. 



