318 



is much retarded. Various proprietary insecticides of German make 

 are recommended against it, one being a nicotine-soap mixture. The 

 larvae of P. fraxini are preyed upon by an unidentified Syrphid larva. 



Zacher (F.). Die Literatur uber die Blattflohe und die von ihnen 

 verursachten Gallen, nebst einem Verzeichnis der Nahrpflanzen 

 und Nachtragen zum " Psyllidarum Catalogus." [The Literature 

 on the PsYLLiDAE and the Galls formed by them, together with 

 a List of Food-Plants and Supplements to the " Psyllidarum 

 Catalogus,"] — Ceniralbl. Bakt., Parasit. u. Infektionskr., Jena, 

 lite. Abt., xlvi, no. 6-10, 5th August 1916, pp. 97-111. [Received 

 20th May 1917.] 

 Only a bibliography of the Psyllidae is given in the present part. 



Altheimer (K.). Ueber im Jahre 1913 erschienene Mitteilungen uber 

 Schadlinge und Krankheiten der Obstbaume. [On Communica- 

 tions made in 1913 regarding Enemies and Diseases of Fniit Trees.] 

 — Centralbl. Bakt., Parasit. u.lnjektionskr,, Jena, lite. Abt., xlvi, 

 no. 6-10, 5th August 1917, XJP- 112-139. [Received 20th May 

 1917.] 



The first section of this paper is a review of communications made 

 in 1913 regarding the insect pests of fruit trees, dealing chiefly with 

 the European ones. 



Altheimer (K.). Obstbaumkranliheiten und Obstbaumschadlinge. 

 Zusammenstellung wichtigerer, im Jahre 1914 erscliienener 

 Arbeiten. [Fruit-Tree Diseases and Enemies : A Compilation of 

 the more important Papers published in 1914.] — Centralbl. Bakt., 

 Parasit. u. Infektionskr., Jena, lite Abt,, xlvi, no. 11-16, 

 2nd September 1916, pp. 347-364. [Received 20th May 1917,] 



The title indicates the scope of this paper, of which the first part 

 deals with insect pests in Europe and elsewhere. 



BuRKHARDT (F.). Eine neue Chalcidide der Gattung Dibrachys. [A new 

 Chalcid of the Genus Dibrachys.]— Centralbl. Bakt., Parasit. u. 

 Infektionskr., Jena, lite. Abt., xlvi, no, 22-23, 1st November 

 1916, pp. 502-504, 1 fig. [Received 20th May 1917.] 



In glasses in which Calandra granaria, L., was being bred, adults 

 of a new Chalcid belonging to the genus Dibrachys emerged. This 

 species is described, but no name is given to it. It is considered to be 

 distinct from that which Zacher bred from Calandra and placed in 

 the genus Meraporiis. 



Stift (A.), Ueber im Jahre 1915 verofientlichte bemerkenswerte 

 Arbeiten und Mitteilungen auf dem Gebiete der tierschen und 

 pflanzlichen Feinden der Zuckerrube. [Noteworthy Papers and 

 Communications published in 1915 on Animal and Plant Enemies 

 of Sugar Beet.] — Centralbl. Bakt., Parasit. u. Infektionskr., Jena, 

 lite. Abt,, xlvi, no. 22-23, 1st November 1916, pp. 515-540. 

 [Received 20th May 1917,] 



The title of this paper indicates the nature of its contents. The 

 insect pests are dealt with in the first section. 



