400 



Nalepa (A.). Revision der auf Fagaceen und Ulmaceen Gallen 

 erzeugenden Eriophyinen. [A Revision of the Eriophyinae 

 producing Galls on Fagaceae and Ulmaceae.]— Fer/ujwfi. zool.- 

 bot. Gesellsck, Vienna, Ixix, no. 10, 31st March 1920, pp. 386-401, 

 [Received 7th June 1920.] 



The species of Eriophyes infesting the beech, oak and elm are dealt 

 with. 



Faes (H.). La Lutte centre le Ver de la Vigne (Cochylis) en 1919. — 

 La Terre Vaudoise, Lausanne, xii, no. 25, 19th June 1920, pp. 

 240-242. 



In continuation of a previous paper [R.A.E., A, viii, 348] the con- 

 clusion reached is that the best means of combating Clysia ambigvella 

 in the Canton of Vaud consists in spraying the first generation cater- 

 pillars, measuring about j-V"! of an inch, with pyrethrum-soap and then 

 sprayiug the eggs laid by the second-generation adults with nicotine. 



Martinet (G.). Un Pi^ge k Courtiliere. [A Trap for Mole-Crickets.] — 

 La Terre Vaudoise, Lausanne, xii, no. 28, 10th July 1920, p. 272. 



Traps in every way similar to those used for moles, but only half 

 the size and of thinner wire, are recommended against mole-crickets 

 [Gryllotalpa gryllotalpa]. They are also placed in position in a similar 

 manner. 



Bernard (C). Suana sp. — De Thee, Buitenzorg, i, no. 1, March 1920, 

 p. 22, 1 plate. 



Attention is drawn to the exceedingly large number of eggs laid by 

 some Lepidoptera. The illustration shows a tea twig bearing a 

 female of Suana sp. and about 2,000 eggs laid by it in the course of a 

 day. 



Blin (H.). Succedanes des Jus de Nicotine comme Insecticides. 



[Substitutes for Nicotine Juice as Insecticides.] — Jl. d'Agric. 

 Pratique, Paris, xxxiv, no. 27, 1st July 1920, pp. 17-18. 



The present high cost of nicotine is an inducement to investigate 

 other substances having at least the same insecticidal value. 



A decoction of the stems and leaves of the tomato plant, especially 

 if prepared with the household washing lye made with wood ash, is a 

 very potent insecticide that may be diluted with water and used for 

 spraying in the same way as nicotine. The active principle m the 

 tomato stem is more mjurious than that in tobacco leaf. The leaves of 

 Digitalis grandijiora yield digitalin, which is as powerful as nicotine 

 and serves admirably against the beet aphis [Aphis rumicis], the hop 

 aphis [Phorodon humuli], fruit tree Aphids, Haltica ampelophaga, etc. 

 It is in June and July, when the plant is in flower, that the leaves are 

 richest in alkaloid. To prepare the decoction 30 lb. of stems with 

 the leaves are boiled for 30 minutes in 20 gals, water. The solution 

 must be stored in labelled containers, as it is a violent poison, and it is 

 diluted for use with an equal part of water. It is less liable to scorch 

 than nicotine. 



