134 Tj.C. ENT(JM()Lor.icAL Society. 



.ffides curriei Coquillett. This species was found only along the Coast 

 and on the outlying islands. It breeds in rock pools filled with brackish 

 water and on salt-marshes. Although a bad biter, it is seldom sufficiently 

 abundant to be troublesome. 



iEdes canadensis (Theobald) Dyar and Knab. This is essentially a 

 woodland species, and, although only one specimen was taken during the 

 past season, it may be fairly prevalent in certain localities when the climatic 

 conditions are satisfactory. 



Culex saxitilis Grossbeck. This small, dark, inoffensive mosquito is 

 found very generally throughout the district. The larvae are found mainly 

 in surface pools and ditches, especially those protected by willow or other 

 growth. The adults are not known to attack warm-blooded animals. 



Culex tarsalis Coquillett. This species is found in small numbers 

 through the Fraser Valley. It is fortunate that it does not occur more 

 abundantly, as it is one of the worst biters and is very insistent in its efforts 

 to enter houses. The larvae are found in roadside ditches, surface pools, 

 and alder and open swamps. 



Culex pipiens Linnjeus. In spite of the fact that conditions very 

 favourable to the development of C. pipiens occur throughout the valley, 

 specimens were taken only in Vancouver. This limited distribution indicates 

 a very recent introduction, and it will be interesting to follow the spread 

 from this point. Culex pipiens is one of those domesticated mosquitoes 

 which have managed to spread far and wide through shipping. Like the 

 English sparrow, they thrive exceedingly wherever introduced. 



Culiseta incidens (Thompson) Felt. This is one of the largest of 

 British Columbian mosquitoes and one of the most inoffensive, as it is so 

 timid that it will seldom bite. It is the most generally distributed species 

 in the district — almost every rain-water barrel is teeming with larvre 

 throughout the summer. Although rain-water barrels provide the main 

 breeding-places, the larvae are by no means particular, and were taken in 

 alder-swamps, ditches, and roadside pools, and even in brackish water in 

 company with ..ffides curriei. 



Culiseta impatiens (Walker). This is another very large mosquito. 

 It is found mainly in thinly wooded areas and on mountain-slopes. Usually 

 it is too timid to be troublesome, but at times it will attack with some determi- 

 nation. This species is the one commonly known as the snow-mosquito, 

 from its habit of leaving hibernation quarters on warm days during the 

 winter. 



Culiseta alaskasnsis (I.udlow). Only one specimen was taken. This 

 was obtained on Alay 20th at Hope. 



Mansonia perturbans Walker. This is a very interesting species. 

 The larvEe and pupje do not come to the surface, but attach themselves to 

 the submerged stems of water-plants, from which they will obtain the 

 necessary oxygen. As the bite of this species is more painful than that of 

 any other North American mosquito, it is fortunate that it is comparatively 

 rare. Specimens were taken in numbers only in certain areas in Stanley 

 Park, Vancouver. 



