KNAB] THE MOSQUITOES OF SASKATCHEWAN 547 



AEDES CANADENSIS Theobald 



Young larvae of this species were first found on May 17 in a 

 water-hole at the bottom of a deep, narrow ravine near Oxbow. At 

 that time another deep well-hole, farther down the ravine and well 

 protected by bushes, contained no larvae. On June 7 both of these 

 water-holes contained numerous larvae ; in the more sheltered one 

 they were present in immense numbers. At this time there were 

 many larvae of Aedes subcantans associated with the canadensis 

 larvae; on June 14 the subcantans had nearly all disappeared, but 

 canadensis in second, third, and fourth stage and in pupa were pres-' 

 ent in thousands. In another ravine a large vat, which on June 4 

 still contained ice, on June 14 contained larvae of canadensis in the 

 second and third stages. On June 12 numbers of larvae of this spe- 

 cies in the third and fourth stages and a few pupae were found in 

 water-filled cattle-tracks at the lower ends of these same ravines. 

 The first adults of A. canadensis issued from the pupa on June 13. 



AEDES SUBCANTANS Felt 



The larvae of this species were found associated with those of A. 

 canadensis in a deep ravine. The larvae developed somewhat earlier 

 than the majority of the canadensis larvae, and they were far less 

 numerous. 



CULISETA INORNATA Williston 



This species breeds throughout the summer, the females hiber- 

 nating and depositing their eggs the following season. It has been 

 taken by Mr. T. N. Willing at Regina, Carnduff, Shepard, Kimis- 

 tino, Olds, and Maple Creek. 



