491 



hole. Full-grown larvae of A. aceris were collected from mid-July to 

 mid- August, pupation taking place during the latter part of August. 

 The flies remained in the puj^al stage during the Avinter, the adults 

 emerging from 24th to 26th April. In the case of A. amelanchieris, 

 full-grown larvae were collected a month earher ; the time of pupation 

 is unknown, but the adults emerge about a week earlier than in the 

 former species. 



Bethune(C. J. S.). Insects affecting Vegetables. — Ontario Dept. Agric- 

 College, Toronto, Bull. no. 251, July 1917, 32 pp., 44 figs. Received 

 6th September 1917.] 



This is a popular manual describing the common vegetable pests 

 in Canada and the remedies that experience has proved to be the 

 most effective in each case. 



Hecke (G. H.). Citrophilus Mealybug Problem. — MtJily. Bull. Cal. 

 State Commiss. Hortic., Sacramento, vi, no. 8, August 1917, p. 337. 



The Citrophilus mealy-bug [Psendococcus citrophilus] is probably the 

 most dangerous insect pest of citrus in California, and any possibility 

 of eradicating it that there may have been in the past no longer exists. 

 Hence the necessity for evolving some satisfactory method of control, 

 towards which end co-ojDerative experimental work is being carried 

 out by means of spraying, washing, fumigation, quarantine and 

 control by natural enemies. 



Ehrhorn (E. M.). Division of Plant Inspection. — Hawaiian Forester 

 and Agriculturist, Honolulu, xiv, no. 5, May 1917, pp. 119-120. 

 [Received 7th September 1917.] 



During the month of March a case of orchids from Guatemala was 

 found infested with the palm aphis, CeraUiphis lataniae, and a mealy- 

 bug, Ccroputo sp. The packing contained a nest of ants, Plieidole sp., 

 and a black weevil. The packing of fruit trees and ornamental plants 

 from Japan contained a colony of ants, Prerwlepis sp. Packages of 

 tree seeds from Argentina were infested with weevils. A package of 

 mantis eggs from Japan was refused delivery to a resident, on the 

 grounds that this insect, though a beneficial species, is such a general 

 feeder that it was thought best not to introduce it into the islands. 



Gray (G. P ). Lead Arsenates, Stone Fruits and the Weather.— J/. 

 Econ. Entom., Concord, N.H., x, no. 4, August 1917, pp. 385-392, 

 1 plate. 



Prune and apricot trees sprayed with acid lead arsenate to control 

 canker worms in the spring of 1915 were found a few weeks later to 

 have their foliage badly injured ; stone fruits showed injury to a 

 greater or less extent, while apples and pears sprayed under the same 

 conditions showed no injury. Samples of the lead arsenate examined 

 during the investigation were of good quality and showed no unusual 

 quantities of water-soluble arsenic. The weather during and after the 

 spraying was damp and misty, and it seems reasonable to conclude 

 that the acid type of lead arsenate, often labelled " standard," is 



