188 



hclcrica ; C. sauniersi, Chap., in Cassia fistula, Hcritiera femes, 

 Shorea robusta and Tcnninalia tomentosa ; C. squamitlatus. Chap., 

 in Heritiera fomes and Tectona grandis [previously erroneously re- 

 corded as in Shorea robusta, R.A.E., A, vi, 522] ; Diapus aculeatiis, 

 Blandf., in Onerous incana and Q. semecar pi folia ; D. capillatus. Samps., 

 in Quercus lamellosa ; D. furiivus, Samps., in Shorea robusta and 

 S. talura ; D. impressus, Jans., in Alnus nepalensis, Quercus incana 

 and other trees ; D. quadrispinatus, Chap., in Alnus nepalensis ; 

 D. quinquespinatus. Chap., in Shorea robusta ; Platypus biformis. 

 Chap., in Pinus longifolia ; P. cupulatus, Chap., in Terminalia belerica ; 

 P. cupulifer, Wichm., in Shorea robusta ; P. curtus. Chap., in Shorea 

 robusta ; P. falcatus. Strohm., in Alnus nepalensis ; P. indicus, 

 Strohm.,in Artocarpus infegrifolia ; P. rectangulus. Samps., in Anogeis- 

 sus latifolia ; P. secretus. Samps., in Aesculus punduana and Odina 

 ic'odier ; P. solidus. Chap., in Albizzia lebbek, Butca frondosa, Dalbergia 

 sissoo, Mangifera indica, Tectona grandis and other trees ; P. suffodiens. 

 Samps., in Pitliecolobiuni saman and other trees ; and P. ttncinatus, 

 Blandf., in Heritiera fomes, Shorea robusta, Terminalia tomentosa 

 and other trees. 



Smith (H. S.). Report of the Pest Control Service, 1919-20.— .l///;/v. 



Bull. Cal. Dept. Agric, Sacramento, ix, no. 10-11, October- 

 November 1920, pp. 417-421, 3 tigs. [Received 10th February 

 1921.] 



It is estimated that about ;;^1, 200,000 were spent in California in 

 1918 for the control of insect pests. The problem of the control of 

 Pseudococcus sp. has been solved by the propagation and distribution 

 on a large scale of its natural enemies. Saissetia oleae, Bern, (black 

 scale) is being gradually reduced by similar means. This scale has 

 been causing a loss to the citrus industry of about /400,000 annually. 

 Vacuum fumigation has proved of great value in controlling pests 

 of dried dates and other food products. The application of liquid 

 insecticides under vacuum is being developed, and shows great promise. 

 The walnut packing houses in southern California are now all equipped 

 with apparatus for the sterilisation of sacks, and the law enacted 

 for the purpose of preventing the spread of codling moth [Cydia 

 pomonella] in walnuts has been effectively enforced. A new prepared 

 bait for grasshoppers will probably prove to be a great convenience. 

 A serious outbreak of Crioceris asparagi (asparagus beetle) occurred, 

 but w'as checked. 



Problems in control that still require solution are presented by 

 Dialeurodes citri, R. & H. (citrus whitefiy), Otiorrhynchus rugifrons 

 (strawberry root weevil) and the Mediterranean fig scale [Lepidosaphes 

 ficus]. The possibility of biological control of Chrysomphalus aiiraniii. 

 Mask, (red scale) and Lepidosaphes beckii,^e\wm., requires to be studied. 



Mackie (D. B.). Report of Field Entomologist (Los Angeles), 1919-20. 

 — Mthly. Bull. Cal. Dept. Agric, Sacranwnto, ix, no. 10-11, 

 October-November 1920, pp. 429-435, 1 fig. [Received 10th 

 February 1921.] 



As explained in the preceding paper, the control of the codling 

 moth [Cydia pomonella'] in walnuts has largely been effected by com- 

 pulsory sterilisation of the sacks, some 983,562 having been treated 

 under the supervision of the field entomologist. 



