\ 



14 



British Coliinibiii. llic spruce mito uu'iitioiicd in the ])r(>\i()us rL'i)<)rt 

 {loc. cit.] was apparently much less abundant on transplanted spruce, 

 but is well established on the large native trees The bark-beetles, 

 Ips hudsonicus and I. perturbalus, arc commonly found throughout 

 northern and western Alberta, and are estimated to cause more damage 

 than forest fires. Cantharis nuttalli, Say (western blister beetle) is 

 injurious to various kinds of beans. 



Locusts were particularly troublesome in the south. Camnula 

 pelhicida, Scud., and Melanopliis ailaniis, Riley (lesser migratory locust) 

 were a serious menace to crops, while M. bivittaUis, Say, M. packardi, 

 Scud., and Circotettix carlinianus, Thom., were present in unusual 

 numbers. Plutella maculipennis. Curt, (diamond-back moth) injured 

 cabbages and cauliflowers. Tortrix [Cacoecia) conflictana, Walk, (aspen 

 leaf-roller) was so abundant that in some districts maples were entirely 

 defoliated, and the caterpillars then attacked elms and poplars, 

 Cyrnatophora rihearia, Fitch (currant span-worm) defoliated all varieties 

 of cultivated and native currants in certain districts. 



McLaine (L. S.). Two new and important Insect Pests recently found 



in Canada. — Agric. Gaz. Canada, Ottawa, vii, no. 10, October 1920, 

 pp. 793-794. 



In August 1920 the presence of Pyraiista nuhilalis, Hb. (European 

 corn borer) was discovered in Canada. From July 1917 onwards, this 

 moth has been recorded from various parts of the United States, and 

 after its appearance in the west of New York State, attempts were made 

 to determine whether it had invaded Canada. It was finally located 

 in two districts, namely, along part of the shore of Lake Erie, stretching 

 about 20 miles inland, and also in St. Thomas, Ontario. No borers were 

 found by scouts working between these two localities. 



Stilpnotia salicis, L. (satin moth) has recently been found feeding 

 on poplars in New Westminster, B.C. This moth is found in Europe 

 and Asia, attacking poplars and willows. It was first recorded from 

 America in the spring of 1919, when it was found near Boston, Mass. 

 Attempts will be made to eradicate it before it spreads further, in 

 view of the danger to poplars and willows, which are abundant in 

 southern British Columbia. 



White (G. F.). American Foulbrood. — U.S. Dept. Agric, Washington, 

 D.C., Bull. 809, 10th March 1920, 46 pp., 8 plates, 9 figs. 

 [Received 2nd November 1920.] 



American foulbrood is an infectious disease of the brood of bees 

 caused by Bacillus larvae [R.A.E., A, ii, 530]. It is characterised by 

 a decided ropiness of the decaying brood and a peculiar foul odour. 

 It is widely distributed, and if not treated its effects are severe, the 

 rule being that the colony infected sooner or later dies out as a result. 



The studies on B. larvae here described were carried out on the same 

 lines and with the same objects in view as those on B. pluton already 

 noticed R.A.E., A, viii, 414]. 



Russell (H. L.) cS: Morrison (F. B.). Experiments in Farming. .!««. 

 Kept. Wisconsin Agric. Expt. Sta., 1918 1919, Madison, Bull. 319, 

 September 1920, 76 pp., 29 figs. [Received 3rd November 1920.] 



The cultivation of peas has been greatly curtailed in Wisconsin owing 

 to the ravages of the pea moth [Cydia? nigricana]. This pest was 



