259 



woody part of the root is also attacked. In the open the first pupae 

 were seen in July and the last in August. The young adults appeared 

 in September. Some of the females have been fertihsed by early 

 October, but oviposition does not occur until the spring. 



Zacher ( — ). Mitteilungen iiber Vorratsschadlinge. [Information 

 about Pests of Stored Food-stuffs.] — Mitt. Biol. Reichsanst. 

 Land-u. Forstwirtsch., Berlin, no. 21, December 1921, pp. 79-90, 

 6 figs. [Received 13th March 1922.] 



There is a danger of Rhizopertha dominica, F., becoming established 

 in grain stores in Germany, though its need for warmth precludes it 

 from being an out-door pest. The numerous insects that very seriously 

 injured a large cargo of wheat from Argentina included Latheticus 

 oryzae, Waterh., and Palorus subdepressus, Woll., which do not occur 

 in Germany or only do so in isolated instances. P. subdepressus 

 had done much damage, though no living specimens were seen, whereas 

 living larvae and adults of L. oryzae were present. Tinea misella, Z., 

 which occurs in peas, is believed to have two annual generations. 

 The common bean Bruchid, Bruchus [Britchidius) obtectus. Say, and 

 another species, which may be Spermophagus sitbfasciatus, Boh., have 

 also been introduced. It was found experimentally that Calandra 

 granaria, L., can feed and develop on oats, contrary to findings by 

 previous observers. Experiments in fumigation with hydrocyanic acid 

 gas seem to show that weak strengths acting for a long time penetrate 

 masses of grain better than higher concentrations used for a shorter 

 time. Both Ptinus fur, L., and Sitodrepa panicea, L., can live in 

 very dry and poisonous substances, a list of which is given for the 

 latter beetle. 



Zacher ( — ). Untersuchungen iiber Spinnmilben. [Investigations 

 on Spinning Mites.] — Mitt. Biol. Reichsanst. Land- u. Forst- 

 wirtsch., Berlin, no. 21, December 1921, pp. 91-100. [Received 

 13th March 1922.] 



The author justifies the nomenclature used in his previous papers 

 and gives the s}Tionymy of the names used by Hirst [R.A.E., A, 

 viii, 466]. Observations on the return migration of Tetranychus 

 telarius, L., to foliage and on its oviposition are recorded. The list 

 of 123 food-plants given in a preceding report [R.A.E., A, ix, 139] is 

 increased to 184. T. telarius, infesting shade trees, can be combated by 

 applying trap-bands and thus capturing the winter females. Potato 

 starch was used for spraying, instead of flour paste, and gave excellent 

 results, but it must be more diluted. 



Zacher ( — ). Mitteilungen iiber die Kiefern-Buschhornblattwespe 

 und die Beendigung des Massenauftretens einiger Forstschadlinge 

 durch die Witterung. [Notes on Di prion pini, L., and the Termina- 

 tion of an Outbreak of some Forest Pests by the Weather.] — 

 Mitt. Biol. Reichsanst. Land- u. Forstwirtsch., Berlin, no. 21, 

 December 1921, pp. 101-104, 2 figs. [Received 13th March 1922.] 



From June to October 1919 a severe and extensive infestation of 

 pines by the saw^y, Diprion {Lophyrus) pini, L., occurred near Pots- 

 dam. Experiments made with generators of arsenical vapours seem 



