31 



in 1920. Investigations prove that the adults prefer freshly worked 

 or soft soil for oviposition. Other cutworms also occur, and the sugar- 

 beet webworm [Loxostege sticticalis] is abundant and often mistaken 

 for P. orthogonia. 



Cammila pellncida (yellow-winged locust) was unusually abundant 

 in 1920. The substitution of amyl acetate for lemons [R.A.E., A, 

 ix, 585] was most effective, and a further improvement is the mixing 

 of the poison and salt with the wet ingredients instead of the dry bran. 



Tortrix {Archips) argvrospila (fruit-tree leaf-roller) has caused 

 over £50,000 worth of daniage to apple trees in the Bitter Root Valley. 

 As the use of miscible oils in early spring did not control the outbreak, 

 further experiments were made after oviposition in the summer. 



Rane (F. W). 16th Annual Report oJ the Massachusetts State 

 Forester for 1%19.— Boston, Publ. Doc. no. 73, 1920, 61 pp., 

 5 plates. [Received 12th November 1921.1 



Remedial work against the gipsy moth [Porthetria dispar] has 

 continued throughout the year on the usual lines. The author is 

 convinced that, before long, spraying and creosoting the egg-clusters 

 in alternate years will be the method adopted, lead arsenate being 

 undoubtedly the best spray for the purpose. Co-operation with those 

 interested in the cranberry industry, for the purpose of clearing the 

 cranberry bogs of gipsy moths, has again been found of great benefit. 



Smith (G. A.). Report of the Superintendent of Gipsy-moth Work. 



— Ann. Kept. Mass. Comniiss. Conserv. and State Forester for 

 Year ending 30th November 1920, Boston, Publ. Doc. no. 73, 

 1921, pp. 53-60. [Received 12th November 1921.] 



In spite of the usual measures against the gipsy moth [Porthetria 

 dispar] and the brown-tail moth [Nygmia phaeorrhoea], the former 

 was slightly more prevalent during 1920, though the resulting defolia- 

 tion was less, the frequent rains possibly checking the feeding of the 

 larvae. Both wilt disease and parasites failed to contribute to the 

 usual extent in reducing the numbers of the pest. The brown-tail 

 fungous disease, which has hitherto been an effectual check on A''. 

 phaeorrhoea, was found in only one colony. Greater co-operation of 

 property owners against this pest is desirable. The reports from 

 cranberry growers regarding the results of gipsy moth work are very 

 encouraging. A brief statement of the more important activities 

 of the Federal work against the gipsy moth is contributed by Mr. A. F. 

 Burgess, who gives some details of the scouting and quarantine work 

 and of the colonisation of insect enemies of P. dispar. Anastatm 

 bifasciatus, which attacks the eggs, was considerably reduced in 

 numbers, though apparently more abundant and more widely dis- 

 tributed than Schedhis kuvanae, which does not survive extremely 

 cold weather. Apanteles melanoscelis was more abundant than ever 

 before, and heavy parasitism of the caterpillars was noticed. Comp- 

 silura concinnata and Blepharipa sciitellata have destroyed many of 

 the larvae. Calosoma [sycophanta] was also numerous in many 

 localities 



A brief account is given of Stilpnotia salicis (satin moth) in the State 

 [R.A.E., A, ix, 574]. 



