358 



MuLLER (H. C). Bericht uber die Tatigkeit der Agrikulturchemischen 

 Kontrollstation und der Versuchsstation ftir Pfanzenkrankheiten 

 der Landwirtschaftskammer fur die Provinz Saclisen fur die 

 Jahre 1916 und 1917. [Report for 1916 and 1917 of the Agi-o- 

 Chemical Research Station and of the Experiment Station for 

 Plant Diseases of the Agricultural Chamber for the Province of 

 Sachsen.] — Abstract in Zeitschr. f. Pflanzenkrankheiten, Stuttgart. 

 XXX, no. 1, 1920, p. 22. [Received 10th June 1920.] 



Potatoes were damaged by the meadow bug, Lygus pratensis, L., 

 oats by the oat mite, Tarsonemus spirifex, March., and wheat by the 

 gall midge, Sitodiplosis (Clinodiplosis) mosellana, Geh. 



Schumacher ( — ). Ueber die Schildlaus, Pulvinaria mesembriantJiemi, 

 VaWot— Deutsche Entom. Zeitschr., 1918, pp. 421-422. (Abstract 

 in Zeitschr. f. Pflanzenkrankheiten, Stidtgart, xxx, no. 1, 1920, 

 p. 38.) [Received 10th June 1920.] 



The discovery of the scale, Pulvinaria mesembrianthemi, Vail., in the 

 plant houses of the Botanical Gardens at Dahlem (Berhn) is recorded. 

 It had evidently been imported from S. Africa and throve in the 

 temperate houses containing the succulents. 



Baer (W.). Der Fichtenrindenwickler und Fichtenknospenmotten. 



[The Spruce Bark Moth and the Spruce Bud Moths.] — Tharandter 

 Forstl. Jahrb., Ixviii, 1917, pp. .38-47. (Abstract in Zeitschr. f. 

 Pflanzenkrankheiten, Stuttgart, xxx, no. 1, 1920, p. 39.) [Received 

 ibth June 1920.] 



In the Tharandt forest (Saxony) the habits of Cydia (Grapholitha) 

 diiplicana, Zett., are different from those usually recorded. Instead of 

 feeding on the swelhngs on the branches of fir due to Aecidium elatinum . 

 it regularly visits, together with Dioryctria spendidella, the resinous 

 edges of the wounds caused by red-deer to the trunks of spruce. 



The author found the caterpillars of C. (G.) ' duplicana to be 

 indistinguishable from those of C. (6r.) pactolana, Zett. ; the former 

 species is less abundant. 



C. {G.) coniferana, Rtzb., was found on resinous, fungus- infested 

 parts of pines, especially on the swelhngs due to Peridermiimi, and 

 on the tops of diseased Weymouth pines or common pines. C. (G.) 

 cosmophorana, Tr., was bred with Rhyacionia (Evetria) resinella from 

 the galls of the latter. 



Morphologically, Cydia (Tortrix) grunertiana, Rtzb., is identical 

 with C. pactolana and must be considered a biological variety of it 

 that has adapted itself to the larch, where it is found on the swellings 

 of old wounds on dead branches of 30-year-old trees. 



In late summer the caterpillar of Argyresthia illuminatella, Z., 

 begins feeding on the terminal buds of fir branches and then bores 

 a mine 1^ "-1| " long, down the shoots. This internal injury is 

 already visible in winter through the discolouration of the needles 

 at the tips of the shoots. 



