80 



Mally (C. W.). The House-Fly. — Reprinted from the Farmers Weekly^ 

 Bloemfontein, 13th, 20th, & 27th October 1915, 9 pp. [Received 

 21st March 1916.] 



In South Africa the adult stage of the house-fly {Musca dotnestica) is- 

 reached 11 days after oviposition. The total number of eggs deposited 

 by a single female is about 500, and if conditions are favourable there 

 are 12 generations annually. 



The use of sodium arsenite as a means of control is given at some- 

 length [see this Review, Ser. B, iii, pp. 220-221]. In addition to the use 

 of branches of Acacia cyclopia as a carrier for the sweetened solution, 

 sawdust, oiled paper, sacking, canvas, straw, etc. may be utilised* 

 AVhere carriers are not available, the bait should be sprinkled freely 

 over the breeding places. 



Hewitt (C. G.). A Contribution to a Knowledge of Canadian Ticks. — 



Trans. R. Soc. Canada, Ottawa, Ser. iii, ix, sect. 4, 1915^ 

 pp. 225-239, 3 plates, 1 map. [Received 27th March 1916.] 



The following species of ticks are recorded : — 



Aegasidae : Ornithodoros megnini, Duges, on jack rabbits at 

 Lethbridge, Alta. ; this is the first record north of Oregon and Idaho. 

 IxoDiDAE : Ixodes angustus, Neum., on a mouse from New Brunswick, 

 and on squirrels, Lepus americanus, and Tamkis townsendi, in British 

 Columbia ; I. auritulus, Neum., on Cyanocitta stelleri carlottae (Queen 

 Charlotte jay) from British Columbia, and Haliaetus leucocephalus 

 alascanus (Alaska bald eagle) ; /. hexagonus. Leech, on a weasel in 

 British Columbia ; I. hexagonus, var. cookei. Pack., on dog in Ontario ; 

 I. marxi, Banks, on red squirrel and fox in Ontario ; 1. pratii. Banks, 

 on dog, cat and horse, at Milk River, Alta. ; I. ricinus, L., on man, 

 dog, deer, Lepus sylvaticus, ground squirrel, etc., in various locaHties 

 in British Columbia ; I. texanus, Banks, on Procyon lotor (racoon) 

 and Sciurus dou^lasii in British Columbia ; Haemaphysalis cinnabarina, 

 Koch, on cattle, Pedioecetes phasianellus (sharp-tailed grouse), Tym- 

 panuchus americanus (prairie hen), and turkey, in Manitoba and British 

 Columbia ; H. expositicius, Koch, from Winnipeg ; H. leporis- 

 palustris. Pack., on rabbits and ground- inhabiting birds, in Manitoba, 

 Saskatchewan, and British Columbia ; Arnhlyomma americanum, L., 

 from Manitoba ; Dermucentor albipictus, Pack., on moose, elk, horse, 

 cattle, and deer, in British Columbia, Manitoba, Quebec and New 

 Brunswick ; D. variabilis, Say, on dog, cattle, horses, and man, in 

 Manitoba ; D. venustus. Banks, on man, horse, mountain sheep, cattle, 

 rabbit, etc., from British Columbia and Manitoba. 



The life-cycle of I. angustus, according to Hadwen's observations, 

 occupies about seven months. Oviposition begins 16 days after 

 maturity is reached, while larvae hatch on the 73rd day. Nymphs 

 appear 61 days later. An account is also given of the life-histories of 

 Dermacentor variabilis, D. venustus and D. albipictus. 



