148 



The liberation of parasites of M. pluvialis is suggested as a means 

 of combating M. disstria in districts where the parasites of the latter 

 are absent. 



Hypliantria cunea (fall webworm) is parasitised in British Columbia 

 by an undescribed Tachinid, unknown in Eastern Canada, whereas 

 the mite, Hemisarcoptes malus, which is predaceous on the oyster-shell 

 scale [Lepidosaphes ulmi] in Eastern Canada and the eastern United 

 States, is apparently absent in British Columbia. Experimental 

 colonies of this mite have been liberated at several points and will be 

 kept under observation during the next few years. 



DiLLE (A.). How Teachers may use Publications on the Control of 

 Diseases and Insect enemies of the Home Garden. — U.S. Dept. 

 Agric, WaHliington, D.C., Dept. Circ, no. 68, September 1919, 

 4 pp. [Eeceived 10th February 1920.] 



The contents of this paper are indicated by its title. 



WoKSHAM (E. L.). Control of Insects attacking stored Products. — 



Georgia State Bd. Entoni., Atlanta, Circ. no. 22, [n.d.] 1 p. 

 [Received 10th February 1920.] 



The insects commonly found attacking stored grain are dealt 

 with and the usual remedial measures advocated. 



Briggs (G.). Report of the Agronomist and Horticulturist. — Rept. 

 Guam Agric. Expt. Sta. 1918, Washington, 14th October 1919, 

 pp. 29-59, 7 plates. [Received 10th February 1920.] 



Serious damage was caused by Pyrausta mihilalis (European corn 

 borer) and Leptocorisa varicornis (rice bug) to sorghum. The latter 

 also caused serious injury to rice. 



Other pests of rice include two Pyralids, one of which folds the 

 leaves on which it feeds and can as yet only be controlled by hand- 

 picking, the other bores upwards in the stems, especially near the 

 joints. The suspension of irrigation may prove an effective remedial 

 measure against this pest. 



Tobacco is attacked by a Grylhd, and the moths, Heliothis assidta 

 and //. obsoleta, which were successfully checked by the use of a spray 

 consisting of 4 lb. of lead arsenate paste, 4 lb. of hme and 100 U.S. 

 gals, of water, apphed as often as twice a week during the rainy 

 season. 



Considerable damage was caused to coconut trees by a scale which 

 had been identified as Aspidiotus oceanica, but is now beheved to be 

 A. destructor. Tliis scale was also abundant on fruit and fohage of 

 bananas, papaws and bread-fruit. 



HousER (J. S.). Destructive Insects affecting Ohio Shade and 

 Forest Trees. — Ohio Agric. Expt. Sta., Wooster, Bull. 332, 

 November 1918, pp. 161-487, 70 plates. [Received 10th February 

 1920.] 



This bulletin supplements one pubhshed more than ten years 

 previously. Since that time much information has been accumulated 

 pertaining to the control of insects affecting shade-trees in Ohio, 



