63 



New Brunswick, during the winter of 1913-1914, over 30,000 winter 

 webs, each containing from 100 to 300 caterpillars, were found distri- 

 buted over eleven counties, as compared with 80 the previous year. 

 In Nova Scotia the figures were 11,000 and 27,000 respectively, and 

 two new counties were found to be infested. The ultimate control 

 of the brown-tail and gipsy moths will only be gained by natural 

 factors. During the past two years Dr. L. 0. Howard has permitted 

 the Entomological Branch of the Canadian Department of Agri- 

 culture to collect in Massachusetts imported parasites in order 

 to transfer them to New Brunswick and Nova Scotia for colonisation 

 there. A predaceous beetle, Calosoma sycophanta, a parasitic fly, 

 Compsilura concinnata, and Apanteles lacteicolor have now been 

 successfully estabhshed in the infested provinces. The chief object 

 of introducing these enemies of the brown-tail and gipsy moths at 

 the present time is to secure their establishment on native insects 

 on which they will feed, as well as on the sparse infestation of 

 brown-tail caterpillars. This will facilitate natural control when the 

 moths become more numerous. 



Locusts. — Agric. Gaz. Canada, Ottawa, i, no. 8, August 1914, p. 627. 



During 1912 and 1913 and in June and July, 1914, locusts have been 

 extremely numerous and destructive in eastern Ontario and parts of 

 Quebec. In 1913 the following poisoned bait proved useful : Bran 

 20 lb. ; Paris green, 1 lb. ; molasses, 2 qts. ; lemons, 3 ; water, 3^ 

 gallons. The bran and Paris green are mixed dry, and after the juice 

 of the lemons has been added to the water, the molasses is stirred in 

 and the whole liquid added to the poisoned bran. One count gave 

 414 dead insects in a square yard. Under laboratory conditions the 

 killing power of Coccobacilliis acridiorum on the Canadian species of 

 grasshoppers was freely demonstrated both in 1913 and 1914. Adverse 

 cUmatic and other conditions militated against the success of the 

 previous experiments imder field conditions and further trials are 

 being made. 



EwTNG (H. E.). The Common Red Spider or Spider Mite. — Oregon 

 Agric. Expt. Sta., Corvallis, Bull. 121, August 1914, 95 pp., 5 pis., 

 30 figs., 14 tables. 



In the introduction to this lengthy and well illustrated bulletin 

 the author suggests the name " Spider Mites " for the Tetrany- 

 CHIDAE instead of the old popular one, " red spiders." He considers 

 that Tetranychus telarius, L., T. himaculatus, Harv., and T. gloveri. 

 Banks, should be regarded as synonymous, and T. sexmaculatus, 

 Kiley, as only a variety of T. telarius. Under Oregon conditions, 

 the incubation period is about 6 days, and varies greatly with the 

 temperature ; dormant winter-eggs of T. telarius are never found out 

 of doors as in the case of the citrus spider mite, T. mytilaspidis, or the 

 brown mite, Bryohia pratensis; the incubation period appears to 

 be the same in both fertilised and unfertilised eggs. The larva soon 

 begins to feed, remaining near the spot where it has hatched and 

 does not appear to spin a web, though frequently found on those spun 



