644 



and readily destroyed ; the prunings are burned at once, but as the 

 larvae live largely in the fruit-bearing branches, which must not be 

 cut away, the method is only very partially successful ; the growth 

 of the plant is also interfered with by such late pruning. Attempts 

 to catch the adults on a large scale with lanterns were made in 1906 

 at Zwaag, but they failed entirely. Leather aprons smeared with an 

 adhesive substance were then tried ; these were hung between the 

 bushes and the moths driven on to them ; sticky racquets were also 

 used and these gave fairly good results, the apron method having 

 more or less failed. One difficulty connected with catching the moths 

 is that it is more or less waste labour unless carried out before the 

 females have oviposited. At Glimmen, spraying the bushes w^ith a 

 petroleum emulsion was tried, and as this was done just as the moths 

 were beginning to fly, large numbers were knocked down and killed. 

 In the following year, it was found that the sprayed area was much 

 less attacked than others which had not been sprayed, but the test 

 was on too small a scale to be of value. The author recommends a 

 thorough spraying with an 8 per cent, solution of carbolineum about 

 the middle of February ; the results are said to be excellent. Control 

 of Abraxas grossulariata was obtained at the same time. Though 

 further experience is required as to the efEect on the bushes themselves, 

 the necessity for severe pruning is done away with, larger bushes 

 can be grown and consequently more fruit produced. It appears 

 useful to spray as early as the end of January and so to make sure that 

 none of the hibernating larvae have emerged from their webs. The 

 necessity for treating all bushes over a given area is insisted on. 



BuRGST (C. A. L. Smits van). Een klein sluipwespje, Lilus nigriceps, 

 sp. n. [A small parasitic Hymenopteron, Litus nigriceps, sp. n.] 

 — Entomologische Berichten uitgegeven door de Nederlandsche 

 Entomologische Vereeniging, Holland, iv, no. 80, 1st November 

 1914, pp. 125-127. 



A new Mymarid, Litus nigriceps, sp. n., bred from the eggs of an 

 unspecified Homopteron, is described. 



DiETz (P. A.). Rupsenvraat in Tweede Gewassen. [Caterpillar attacks 

 on successive crops.] — Meded. v. h. Deli Proefst., Medan, ix, pt. 1, 

 June 1915, pp. 8-14. 



Considerable attention is now being given in the Dutch East Indies 

 to the question as to how far a particular crop influences the chance 

 of caterpillar attack on the crop which is to follow it, especially when 

 this is tobacco. Chloridea {Heliothis), Phytometra (Plusia) and Prodenia 

 are found on Phaseolus mungo and Ipomoea batatas, but not in very 

 great numbers. Prodenia is occasionally found on Ipomoea, but only 

 one case of Chloridea on maize came under the author's notice. Among 

 the succession crops, Ip)omoea batatas has suffered very seriously from 

 the attack of Herse {Protojjarce) convolvuli, especially on the east coast 

 of Sumatra. This pest is widespread and is known to damage various 

 crops in South Africa, and is common in Holland. The eggs are laid 

 singly on the leaves of various plants, but on Ipomoea by preference. 

 The caterpillars are often present in such enormous numbers that a 

 distinct odour can be perceived in the fields attacked. In the 



