191 



McCallum (J.). Large Larch Sawfly [Correspondence.] — Qtrly. JL 

 Forestry, Loiidon, viii, no. 4, October 1914, p. 333. [Received 

 16th March 1915.] 



Lygaeonematus (Nematiis) erichsoni (larch sawfly) still seems to 

 be spreading throughout England, and is here, reported from Dorset. 

 It is important to ascertain how it reached that locality, as it has not 

 been previously recorded in the south of England. 



Tragardh (I.). Forsok med svavelkalkvatska mot larktradsmalen- 



[Experiments with lime-sulphur spray against the larch moth 

 {Coleophora laricella, Hb.).] — Centralanst. for J ordhruksforsoky 

 Flyghlad no. 49, Stockholm, Entom. Avd. no. 11, 1914, 3 pp. 



The splendid results obtained by G. W. Herrick {Cornell Univ. 

 Agric. Expt. Sta., Bull. no. 322) against the larch moth with lime- 

 sulphur spray, 29 Be., 1 part to 7 parts of water [or at 33° Be., 1 part 

 to 8| parts, see this Review, Ser. A, i, p. 64J induced the author to test 

 it against the same insect in the vicinity of Stockholm, where it had 

 been attacking the larch trees for several years. The trees w^ere 

 sprayed in the middle of April, immediately before the buds burst. 

 In the middle of June, when the larvae had finished feeding, the trees 

 were examined, and the difference between the sprayed and unsprayed 

 trees was very conspicuous even at a distance. The examination of 

 the needles showed that in the unsprayed trees about 67 per cent, of 

 them were destroyed, while in the sprayed only 13 per cent, were 

 attacked. As on the latter trees only branches were examined which 

 showed any damage at all, the figure given is higher than the true 

 percentage. The following year the experiments were repeated. 

 In order to ascertain the intensity of the attack the number of winter 

 cases per 100 buds was counted. It proved to be 27, 41 and 74 

 respectively in the trees to be sprayed. The spraying \v-as done a 

 little later than in the previous year, on the 24th April, the buds 

 measuring about 4 mm., and many larvae had left their hibernating 

 quarters and started mining the needles. The spray was diluted 

 with 20 parts of Avater. The examination on the 16th May showed 

 that in the sprayed trees only 0'24 per cent, of the needles were attacked^ 

 in the unsprayed 50-60 per cent. The experiments thus wholly 

 confirmed the results obtained by Herrick, showing that lime-sulphur 

 spray is an excellent remedy against the larch moth. 



Headlee (T. J.). Report of the Entomologist. — Rept. New Jersey 

 Agric. Expt. Sta., 1913, New Brunswick, 1914, pp. 631-698, 

 2 plates. [Received 8th March 1915.] 



In New Jersey, the late, cold spring of 1913 was especially favour- 

 able to the development of Aphids, as plenty of food was available 

 and the temperature was too low for their hymenopterous parasites 

 to thrive. Phylloxera caryae-avellana, Riley, P. caryae-caulis, Fitch, 

 and P. caryae-phallax, Walsh, were reported as making galls on 

 hickory, and grape leaves suffered similarly from P. vastatrix, Planch. 

 Maple foliage was badly infested in many cases with Pemphigus 



