250 ENTOMOLOGICAL NEWS. [October, 



" Notes on Insecticides" were presented by Mr. C. L. Marlatt. He spoke 

 ofa large number ofexperiments with various insecticides noting their effect. 

 From his experience it seems that the kerosene emulsion may be used at 

 a much greater strength than usually recommended. Mechanical mixtures 

 of kerosene and water he had not found reliable, the two liquids not mixing 

 continuously in the same proportions, making it impossible to apply them 

 at a definite ratio. Arsenate of lead he considers meritorious, and the 

 most promising of new insecticides. 



Mr. B. T. Galloway followed on "Some new Insecticides and their combi- 

 nation with Fungicides." This paper dealt largely with mixtures of kero- 

 sene and emulsions, which, it is found, are easily made with lime. The 

 ordinary emulsion with soap may be diluted with the Bordeaux mixture 

 ■ instead of with water. A variety of resin washes were described and 

 combinations with kerosene were shown. It appears that our battery of 

 insecticides is far from being exhausted, and that we have yet an enormous 

 field for experimentation. No single mixture or wash was specifically 

 recommended, but the subject was presented suggestively rather than 

 otherwise. Considerable discussion ensued and many questions were 

 asked concerning the effects of the mixtures on plants and insects. 



A paper from Mr. F. M. Webster was on " Spraying with Arsenites vs. 

 Bees," in which he relates the results of some experiments which seem to 

 prove that bees and their brood may be killed by feeding in sprayed 

 blossoms. This is the first piece of real evidence in the case, but is yet 

 far from conclusive. The paper, when published, will be worthy of close 

 analysis. 



Mr. E. B. South wick gave a description of the "Economic Entomo- 

 logical work in the parks of New York City." He gave in some detail 

 the chief troubles of the entomologists and described the means used to 

 lesson or destroy the insects. A feature of the work is the very large part 

 played by manual labor — i. e., the collecting and destroying as against 

 spraying or the use of poisons. Another interesting item was the use of 

 a forcible jet of clear water to break up colonies of plant-lice before using 

 insecticides. This was favorably commented on by Mr. Howard. 



Later on Mr. Southwick also presented a notfe on " The Wood Leopard 

 Moth in the parks of New York City." This is Zeuzera pyrina, and it is 

 the most difficult of all pests to deal with. It is beyond reach of poisons 

 and only cutting and burning infested wood, or searching for and destroy- 

 ing larvae in valuable trees seems to be effective. This seems to have 

 lessened the numbers somewhat. Electric lights to attract the moths are 

 a desideratum and may be obtained in the future. The larva seems to 

 be migratory to some extent and often, in confinement, leaves one twig 

 or branch for another. 



Mr. Smith remarked that this latter character was shared by other Cossid 

 larvae, one of those boring in oak having been observed by him. 



Mr. A. D. Hopkins gave *' Notes on some discoveries and observations 

 of the year in West Virginia." A very large number of insects were men 



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