Oct., *o6] ENTOMOLOGICAL NEWS. 279 



Notes on Mosquitoes. 

 By Dr. S. E. Weber, Lancaster, Pa. 



(Continued from p. 217, Vol. xvii, No. 6.) 



DAY MOSQUITOES. 

 Culicada Felt (Culex) canadensis Theobald. 



This species I have found to be distinctively a day mosquito. 

 Its peculiar habits are somewhat modified according to the 

 stage of the season. Observations were made in 1901 on this 

 form in southwestern Pennsylvania, along the Susquehanna 

 River, where it was found in abundance breeding in the waters 

 of the old abandoned tide- water canal. The adults made their 

 first appearance May 23rd, when at 10 a. m. a specimen was 

 captured in the act of probing the point of my finger for blood. 

 The last one of the season was seen October 29th in the after- 

 noon. 



Their attacks in the early part of the season were invaribly 

 made from 10 a.m. until noon, and in the gloaming of the 

 evening, and by the latter part of September they were noticed 

 during the middle of the day only, and not in the evening, for 

 it seemed now too cool for this species to fly. In October they 

 were numerous in the afternoon, more so between 2 and 3 

 o'clock, and on warm days were very annoying at that time. 

 In a bark-pile, about 500 yards away from a breeding place, 

 they seemed to have their abode, since they were intolerable 

 at that place. Aside from the Anopheles this was the common 

 species found in the immediately locality of Shenk's Ferry, 

 Penna. 



That the day-time habit is not only confined to this species 

 is shown by the fact that C. triseriatus Say will also make her 

 attacks in day time. In the handling of thousands of Culex 

 pipiens none has ever effered to bite me, but Culicada triseria- 

 tus have alighted directly from the vessel where they were bred 

 on my hand for the first sip of blood. 



The same peculiarity may also be noted in other genera, 

 notably in Anopheles, but in these species the day-time habit 

 was only noticed in their first appearance in the spring. 



