449 



the Braconid, Rhogas terminalis, Cress. Adults of R. terminalis were 

 collected at intervals between August and October by means of a light 

 trap. In 1915, adults began to appear in the middle of April and 

 numerous captures were made between May and August. In order 

 to determine certain points in the life-history, adult parasites coming 

 originally from parasitised larvae of C. unvpuncta were confined with 

 host larvae which had been reared in the laboratory and were thus 

 known to be unparasitised. The age of the host larva was known in 

 each case. Pairing on the part of the parasite took place immediately 

 after emergence, and oviposition quickly followed. The combined 

 duration of the egg and larval stages averaged 19'1 days and that 

 of the pupa 16*7 days. Adult males hved on an average 16*5 days 

 and adult females 32*5 days ; the maximum duration of adult life was 

 35 days in the male and 75 days in the female. Fertilised females 

 gave rise to offspring of both sexes ; unfertiUsed females were able to 

 reproduce pathenogenetically, but the offspring were males in all cases. 

 Oviposition took place only in host larvae in the second and third 

 instar. Hibernation was found to occur in the pupal stage. In the 

 latitude of Hagerstown probably at least four complete generations of 

 R. terminalis occur each year. 



Pettit (M.). Investigation and Instruction in Beekeeping. — Jl. Econ. 

 Entom., Concord, ix, no. 4, August 1916, pp. 406-411. 



In his address delivered before the American Association of Economic 

 Entomologists, the author enumerates the various problems which 

 still require extensive investigation. These include the wintering of 

 bees, prevention of swarming, preparation of honey for sale, influence 

 of weather conditions on the working of bees, comb building, bee 

 diseases, etc. A brief outline is given of the courses of instruction in 

 agriculture offered at the Ontario Agricultural College and of the 

 extension work carried on in that Province. 



Sladex (F. W. L.). Bee Work at the Canadian Government Experi- 

 mental Farms. — Jl. Econ. Entom., Concord, i:i., no. 4, August 1916, 

 pp. 411-413. 



Agricultural investigations are carried out at the Central Farm, 

 Ottawa, and at thirteen Branch Experimental Farms. In all cases 

 it has been found that bee-keeping can be profitably carried out, 

 although in Nova Scotia the wintering problem is a difficult one, on 

 account of the long winter with its sudden changes in temperature, 

 and by reason of the unwholesome stores gathered by the bees. The 

 sources, quantity, quality and period of production of honey, are the 

 main objects of investigation at the present time. Lucerne has been 

 proved to be a source of honey in south Alberta. 



Phillips (E. F.). The Purpose of College Beekeeping.— J^ Econ. 

 Entom., Concord, ix, no. 4, August 1916, pp. 413-417. 



The author emphasises the need for more extended scientific 

 investigations on the subject of bee-keeping and for the increased 

 production of honey for commercial purposes. The introduction of 



