556 EXPERIMENT STATION RECORD. [Vol.41 



Avellino districts liere reported. The most serious damage was caused to 

 tlie petiole and the axis of tlie huds. An account is given of tlie movpliology 

 and biology of this weevil, which is only known to attack hazel trees. 



Catalogue of species of Curculionidse of the Cholina group, A. da Costa 

 Lima (Arch. E.scola Svp. Ayr. e Med. Vet. [Pinheiro. Rio de Janeiro], 1 (1911), 

 A"o. 1, pp. .i5~'J0). — The author recognizes 311 species and 34 genera. 



Report of the apiarist, F. AV. L. Sladen (Canada E.rpt. Farms Rpt. 1918, pp. 

 41-Jf3). — This report includes a summary of the average production of apiaries 

 at 16 of the experimental farms since 1913. The average weight of honey 

 production per colony, spring count, varied from 21.8 lbs. at Sidney, B. C, 

 to 106.7 lbs. at Ottawa, Ont., while the value of pi'oduction per colony, honey 

 and bees, after deducting winter loss varied from $1.51 at Charlottetown, 

 P. E. I., to $18.31 at Lethbridge, Alta. Alsike and white clover were the prin- 

 cipal sources of honey at all the farms except Lethbridge, where it came from 

 alfalfa, which also gave much of the .vield at Sunnnerhmd, B. C. 



The general conclusion drawn from the data olitained is that bees can be 

 kept with profit in the regions served by all the experimental farms, but 

 that eastern Canada offers better opportunities than western. Experiments 

 have been started with fireweed (Epilobium angn.^ti folium), which is said to 

 be the most promising honey plant for commercial beekeeping at altitudes and 

 latitudes higher than those at which clover gives best results. An attractive 

 and inexpensive paper container for granulated honey has been devised at the 

 Central Experimental Farm to meet the increased cost and scarcity of tin 

 containers. 



Trial of a system of keeping two queens in a hive, F. W. L. Sladen (Agr. 

 Gaz. Canada, 6 (1919), No. 2, pp. 13Jf-136, fi(i><. 3).— In an attempt to meet the 

 great need for a sure method of preventing swarming without much labor, 

 the autlior devised a system which has been tried on a small scale during 

 1918, in which two queens are kept in one hive during 11 months of the year. 

 The trial has* shown the system to be workable, and preparations have been 

 made for a more extensive test in 1919. 



" Two young queens separated by a double wire-cloth screen were wintered 

 in one hive in the cellar in 1917-18. During the honey flow from dandelion, 

 the bees and queen on one side of the screen were transferred to a separate 

 hive ; thus the desire to swarm at this time was not allowed to develop, and 

 there was an uninterrupted and steadily increasing production of young bees 

 from the two queens, with the result that two strong colonies were obtained 

 in time for the opening of the honey flow from clover. The number of bees 

 produced much [exceeded] the number that was obtained in hives that began 

 the season with only one queen, [and] 480 lbs. of honey were produced by 

 these bees. 



" In order to prevent swarming during the clover honey flow and to again 

 get two young queens in each hive (all tlie following stages were carried out 

 in several colonies), the old queen was removed from the brood chamber at 

 the commencement of this honey flaw, and 8 days later all queen cells were 

 destroyed except two, one on each side of the wire-cloth division then inserted. 

 A special portico fixed in front of the hives separated the entrance of each 

 half of the hive from that of the other by about 9 in., to prevent the queens 

 that emerged from the cells from meeting after returning from their mating 

 flights. No swarming took place." 



How the female Blastophaga works, I. J. Condit (Fig and Olive Jour., 4 

 (1919), No. 1. pp. 9, 12, 13).— An account of observations of the female Blasto- 

 phaga grosaorum in California. 



