353 



interior ; fruits badly attacked by Pseudococcus crotonis seem to be 

 preferred. Pupation takes place in a retort-shaped cocoon which is 

 attached to the fruits or to a twig near by. The moth is described 

 and its relationships and synonymy discussed at length ; the opinion 

 is expressed that this species may prove to be identical with Eublemma 

 versicolora, Walk. 



Tragardh (Ivar). Vara vanliga spinnkvalster och deras bekampande. 



[Our most common spinning mites and their control.] — Central- 

 anstalten for Fdrsoksvdsendet pa Jordbruksomradet, Stockholm, 

 Flygblad no. 58. Entomol. Avd. no. 13, March 1916, 4 pp., 

 3 "text-figs. [Received 26i:h June 1916.] 



This is a short popular summary of the investigations pubhshed 

 earlier by the author [see this Review, Ser. A, Vol. iii, p. 252]. 



It deals with the following species : — The fruit tree spinning mite, 

 Paratetranychus pilosu.s, C. and F. ; the pine-tree spimiing mite, 

 Pamtetmnyckus ununguis, Jac. ; the hothouse spinning mite, Tetrany- 

 chus althaeae, v. Hanst., and the common spinning mite, Tetranychus 

 telarius, L. The measures of control recommended are : — Winter 

 sprapng against the eggs of P. pilosus, of P. ununguis on larch and the 

 hibernating females of T. telarius. Summer spraying with hme- 

 sulphur against T. althueae in hot-houses and hot-beds (21° Be), one 

 part to 40 parts of water with the addition of gelatine (10-16 grammes 

 to 100 litre water). Frequent spraying of the plants with water is also 

 very useful in hot-houses, as well as spraying wnth quassia or nicotine. 



TuLLGREN (Alb.). Rosentriten och en ny aggparasit pa densamma, 



[Typhlocyba rosae, L., and a new egg-parasite of the same.J 

 — Meddelande no. 132, Centralanstalten for Fdrsoksvdsendet pa 

 Jordbruksomradet, Stockholm, Entomol. Avd. no. 24, 1916,, 

 13 pages, 7 text-figs. 



Typhlocyba rosae is widely distributed in Sweden and apparently 

 occurs wherever its native food-plant, the wild briar, is found. It is a 

 well known pest of roses, but otherwise the author has found it only on 

 apple-trees and is inclined to believe that statements of its occurrence- 

 on other plants are due to mistakes in identification. Oviposition takes 

 place in the autumn in pockets in the bark, and the eggs hatch in the 

 spring. In Sweden there is probably only one generation a year. 

 If rose-bushes have been severely injured, the branches most heavily 

 infested with eggs must be removed. The leaf-hoppers and their 

 nymphs are easily killed with various contact sprays, and the effect of 

 this treatment is the more pronounced the younger the larvae are, 

 because later the leaves become curled and provide effective protection 

 for the insects ; the adults are also very active and escape the spraying. 

 Nicotine and quassia are especially effective. The eggs are parasitised 

 by a Mymarid, Anagrus bartheli, sp. n., a detailed description of which 

 is given, accompanied by figures. 



(C285) 



