THE CANADIAN ENTOMOLOGIST. 87 



Aedes salinarius, another salt marsh form is as strongly 

 positively hydrotropic as Ciilex pipiens, in fact its hydrotropic 

 reactions are similar to those of pipiens, as is its life history. 



At different periods during a mosquito's life, its hydrotropic 

 reactions are overshadowed by responses to chemotropic and 

 phototropic stimuli and in some cases, negative hydrotropism 

 might be mistaken for positive chemotropism. In the cases of 

 the sterile females of Aedes sollicitans, chemotropism plays very 

 little if any part in explaining their migratory habit. If it did 

 the migrations would not be so extensive or cover the long dis- 

 tances they do. 



Negative hydrotropism seems to be more prevalent among 

 the salt marsh than other forms, in fact other species are nega- 

 tively hydrotropic only for short periods and the females respond- 

 ing to such stimuli are not barren. For some reason the sterility 

 of sollicitans seems to render it exceedingly susceptible to negative 

 hydrotrc^ic stimuli. 



ANNUAL MEETING OF THE BRITISH COLUMBIA 



BRANCH. 



The annual meeting of the British Columbia Entomological 

 Society took place on January 9th, 1913, in Victoria. A morning, 

 afternoon and evening programme was arranged. From 18 to 27 

 members were present during the day. A varied programme was 

 rendered which included several reports from districts in the 

 Province, viz., the Vicforia District, the Lower Mainland, the 

 Okanagan and the Kootenay. 



An interesting lecture was given on the use of Carbon 

 Bisulphide as a fumigant under coastal conditions by Mr. W. H. 

 Lyne, Assistant Inspector of Fruit Pests. Mr. W. H. Brittain 

 followed with a paper prepared on the important subject of 

 Beneficial Insects, bringing the notice of the members forcibly to 

 the fact that applied parasitic entomology was well to the fore- 

 front of present day economic entomology. He gave a number of 

 interesting records which had taken place during the past few 

 years in this especial connection. 



Mr. G. O. Day, F. E. S., Duncans, presented a paper on 

 Xanthia pukheUa Smith, and offered a few sj'stematic notes on its 



