332 



tjber das *' Tannensterben," [Causes of Death of Fir Trees.] — 

 Zeitschr. f. angew. Entoni., Berlin, vi, no. 1, September 1919, 

 pp. 168-170. [Received 19th April 1920.] 



The continued djing back of silver fir [Abies pedinata] in the 

 Frankenwald in North Bavaria, previously attributed to the fungus 

 Agaricus melleus, is now thought to be the result of insect attack. 

 Several beetles have proved to be abundant, including Pissodes piceae, 

 which attacks stems of any age between 30 and 200 years though 

 40 to 80-year old wood is preferred. One tunnel-system is sufficient 

 to kill the tree. The chief enemies of tliis beetle are woodpeckers. 



Ips curvidens is most abundant in old trees and seldom occurs in 

 young ones. It is often found in company with Cryphalus piceae, 

 which attacks the tops and strong branches of old trees, but which 

 is most frequently found in young trees. 



Other pests of less importance are Chermes (Dreyfusia) piceae and 

 Sirex spp. 



MtJLLER (G. W.). 1st Thereva nobilitata, Fabr., ein Roggenschadling ? 

 [Is Thereva nobilitata, F., a Pest of Rye ?]. — Zeitschr. f. angew. 

 Entom., Berlin, vi, no. 1, September, 1919, pp. 172-173. 

 [Received 19th Apiil 1920.] 



The author considers that the damage to rye attributed to Thereva 

 nobilitata, F. [R.A.E., A, viii, 270] is due to some other pest, as this 

 ily is probably predaceous on other insects. 



Angewandte Entomologie und Schule. [Applied Entomology and 

 Schools]. — Zeitschr, f. angew. Entom., Berlin, vi, no. 1, September 

 1919, pp. 180-183. [Received 19th April 1920.] 



The importance of intensive pest control can only be disseminated 

 in Germany if the foundation for it is laid in the State elementary 

 schools. Suggestions in furtherance of this idea are made by K. 

 Escherich and A. Haase. 



Collin (J. E.). Eumerus strigatus, Fallen, and tubercidatus, Rondani, 

 (Diptera, Syrphidae). — Entom. Mthly. Mag., London, no. 672, 

 Third Ser., no. 65, May 1920, pp. 102-106, 1 plate. 



Narcissus bulbs are damaged by two species of Eumerus in Britain. 

 E. strigatus, Fall., which has also been recently found infesting parsnips, 

 and E. tuberculatus, Rond., which is here described. 



Jack (R. W.). Further Experiments with Poisoned Bait on Maize 

 Lands. — Rhodesia Dept. Agric, Salisbury, BuU. 353, April 1920, 

 8 pp. [Received 1st June 1920.] 



The information contained in this bulletin has been noticed already 

 [R.A.E., A, viii, 322]. 



