421 



juniperata, L. ; Cryptopimpla errabunda, Grav., from Larentia cucullata, 

 Hiifn. ; Pimpla ardica, Zett., and Ichneumon captorius, Thorns., 

 from the pupae of Gnophos myrtillata, Thunb. 



Ahlberg (0.). Beitrag zur Deutung der Zetterstedtschen Thrips-Arten. 



[Contributions towards the Interpretation of the Thysanoptera 

 described by Zetterstedt.] — ■ Entomologisk Tidskrift, Stockholm,. 

 xxxix, no. 2, 1918, pp. 140-142. 



Examination of the type of Thrips picipes, Zett., described by 

 Zetterstedt in " Insecta Lapponica," and still preserved in the 

 entomological collections at Lund, has elicited the fact that this 

 species is identical with Taeniothrips primulae, Hal. 



Wahlgren (E.). Ueber Musca pumilionis, Bierkander. — Entomologisk 

 Tidskrift, Stockholm, xxxix, no. 2, 1918, pp. 134-139. 



In modern entomological literature this species is referred to the 

 genus Siphonella, while in the earlier Swedish literature on economic 

 entomology it is referred to the genus Chlorops. The author expresses 

 the opinion that it is identical with Chlorops taeniopus, Meig., while 

 Oscinis pumilionis, Fall., and Zett., which was wrongly supposed 

 by these authors to be identical with Musca pumilionis, Bierk., is 

 a Siphonella, which must bear the name S. pumilionis, Zett. 



TuLLGREN (A.). Nagra ord om Forodelse pa Vetefalten inom Gotaland. 



[Some Remarks on the Devastation of the Wheat-fields irL 

 Gotland.] — Tidskrift for Landtman, 1918, nos. 24, 31, 33, pp. 

 397-398, 504-507, 4 figs. 



An account is given of an outbreak of Cicadula sexnotata, with 

 illustrations of the developmental stages and the injury caused. 

 The insects were so numerous that a net, moved ten times 

 to and fro in a field, collected 7,000 individuals. The leaves of the 

 wheat were at this time, the end of June, quite withered. In July 

 the insects migrated to late sown oats and barley. Their local 

 occurrence was very remarkable, one field being frequently completely 

 devastated, while another close by escaped injury, the field which 

 escaped being as a rule that which had been sown late, while early 

 sown fields were attacked. This is explained by the assumption 

 that the oviposition period of the insect coincided with the time 

 when the wheat appeared above the ground in the previous autumn. 



The remedial measure suggested is the collection of the larvae 

 and nymphs by means of nets. 



Akerman (A.). Angrepp av Vetemygglarver pa Varvete Sommaren 



1917. [Injuries caused by the Wheat Midge on Spring Wheat 

 during the Summer of 1917.] — Sveriges Vtsddesforenings Tidskrift, 



1918, pp. 90-93. 



This investigation on Contarinia tritici is a continuation of researches 

 on this pest published in 1917 [see this Review, Ser. A, vi, p. 151]. 

 As already observed by the author in the case of autumn wheat, the 

 spikes that are most dangerous are those that are bursting when 



