ito 



examinations have led to the conclusion that it is tound only on walnuts. 

 In New Jersey this species has been found on butternut {Jnglaois 

 cinerm, walnut {J. nigra) and Japanese walnut (J. sibboldiana), 

 while outside New Jersey it has been taken on pecan. In southern 

 New Jersey adults that have hibernated appear about the middle of 

 May, and oviposition occurs during the third and fourth weeks, fro.m 

 1 to 4 eggs being laid in the angles formed by the mid-rib and the side 

 ribs on the under-surface of the leaf. Most of the eggs are placed in the 

 basal half of the leaf and none at the tips where the veins are finer. 

 By the thu'd week in June a few second-stage nymphs and many of 

 the third and fourth and a few fifth-stage ones were found. By the 

 end of the first week in July adults of the first generation were present 

 with many fifth-stage mTnphs. Eggs were deposited soon afterwards, 

 and during the last week in July first-stage nymphs of a second 

 generation were observed. During late August and early September 

 adults of the second generation appeared and later went into hiber- 

 nation. There are therefore two generations, each requiring about 

 six weeks. On account of the extended oviposition period, all nymphal 

 stages may be found at the same time as adults. The nymphs feed 

 in colonies on the under-suiface of the leaves, causing a discoloration 

 of the upper surface. In severe infestations the leaves become yellow 

 and dry and many fall to the ground. All stages of the insect are 

 described. C. juglandis, Fitch, which resembles and is frequently 

 confused with C. parshleyi, occurs throughout New England and south 

 and west to Kansas and Texas, its food-plants including walnut, 

 butternut and lime. It undoubtedly occurs in New Jersey, though 

 up to the present time no species but C. parshleyi has been found there 

 on walnut. 



Ross (W. A.). The Pear Psylla. — Canadian Horticulturist & Beekeeper, 

 Toronto, xxvii, no. 1, January 1919, pp. 3-4. 



Weather is an important factor in control of the pear psylla \ Psylla 

 pyricola] ; a protracted period of cold and wet in the spring destroys 

 many eggs and newly hatched young, while long periods of hot, dry 

 weather are fatal to numbers of nymphs. Experience in spraying in 

 Ontario has shown that the most economical and satisfactory method 

 of combating this pest is to postpone the dormant application of 

 lime-sulphur until shortly before the trees bloom and then thoroughly 

 drench all parts of the trees, including the under-side of the twigs 

 and branches. This destroys the newly-hatched nymphs and mature 

 eggs. To the spray applied just after the blossoms fall nicotine 

 sulphate 40 per cent, should be added at the rate of | pint to 80 gals. 

 of spray mixture ; this kills the nymphs in the axils of the leaf-petioles 

 and blossom-stems. 



Treherne (R. C). Insect Notes of the Year 1918.— Agric. Jl., Dept. 

 Agric., Victoria, B.C., iii, nos. 11-12, January-February 1919, 

 pp. 258, 281 & 301. 



Observations on Taeniothrips inconsequens (pear thrips) continued 

 during recent years have shown the dates of emergence of the adults 

 to be from the last days of March until the end of April. It has 

 been found that spraying against the adults is more important than 



