77 



owing to the presence of arsenic as a soluble salt. The addition of 

 lime at the rate of about 10 lb. to 100 U.S. gals, of lime-sulphur, before 

 the lead arsenate is added, prevents this reaction to a certain extent, 

 and this combination after two days showed 75 per cent, of the lime- 

 sulphur to be unchanged, whereas the mixture without the addition 

 of lime in the same length of time completely transformed to lead 

 sulphide or thiosulphate. 



Baker (A. C). U.S. Bur. Entom. The Houghton Gooseberry 

 Aphis.— JZ. Econ. Entom., Concord, N. H., xii, no. 6, December 

 1919, pp. 43a-437. 



The eggs of ApJiis houghtmiensis are laid as early as the first week 

 in October in confinement upon the bark or under the loose bark 

 of the twigs of gooseberry bushes and occasionally about the bases 

 of the buds and upon the thorns. They hatch about the middle 

 of April and the young stem-mothers feed on the opening leaves 

 and are found either on the under-surface of the leaves or on the 

 petioles. The leaves curl and completely hide the stem-mother as 

 well as the young, which may remain enclosed in the leaf or migrate 

 to new leaves. Alate viviparous forms occurred in every generation 

 in which specimens were reared from the second onward. Part of 

 the offspring of the stem-mothers thus became winged, but all 

 individuals of this form died without reproducing when placed on 

 gooseberry, thus indicating that for certain individuals at least an 

 alternate food-plant is necessary. The summer apterous forms first 

 appeared on the 9th May and commenced feeding on the leaves, 

 causing the same curling as the stem-mothers ; they also attacked 

 the tender shoots. The sexes, both of which are apterous, appear 

 in September and October. The various stages are described. 



Weiss (H. B.) & Dickerson (E. L.). The Life History and early 

 Stages of Macropsis virescens var. graminea (Fabr.), a Poplar 

 Leaf Hopper in New Jersey (Horn.). — Jl. Econ. Entom., Concord, 

 N. H., xii, no. 6, December 1919, pp. 437-440. 



The eggs of Macropsis virescens var. graminea are laid during the 

 end of June and beginning of July beneath the bark tissue of 

 Lombardy poplars, the bark over the egg being slightly raised. During 

 the first week in May the nymphs emerge and may be found on the 

 unfolding leaves and leaf-petioles ; sometimes as many as 3 or 4 

 occur on one leaf. They gradually disperse to the stems and rest in 

 the axils of the leaves or occasionally on the petioles. There are 

 5 nymphal stages, their total duration being about one month. The 

 adults appear from the beginning of June to July. Hibernation 

 takes place in the egg-stage. All stages are described. 



Wellhouse (W. H.). Lace Bug on Hawthorn, Corijthucha bellida, 

 Gibson (Tingididae, Hemiptera).— J^. Econ. Entom., Concord, 

 N. H., xii, no. 6, December 1919, pp. 441-446, 2 figs. 



The lace bug, Corythuca belMa, Gibs., is recorded^ from several 

 localities in New York round Ithaca. The only previous record is 

 apparently from Ohio. The food-plants include Crataegus neojiuvialis, 



