OF WASHINGTON, VOLUME XII, 1<>](>. 17 



Aedes cyanescens Coquillett. 



Very abundant in suitable localities after rains, in fields, 

 thickets, and about dwellings. Does not enter dwellings. The 

 appearance of this mosquito immediately after rains is so 

 strikingly characteristic that even people who never pay much 

 attention to such things notice it. They are out in force for 

 several days after a rain and then only a few will be found 

 until the next rain. 



The most annoying of all mosquitoes when occurring abun- 

 dantly, not only to human beings, but to all kinds ot stock. 

 They are very persistent and hard to kill unless you hit them 

 a real hard blow. The only mosquito, so far as I know, that 

 will at all times come out into the sunshine on the very hot- 

 test days and bite. They gorge themselves until they literally 

 fall to the ground, almost unable to fly at all. They never 

 z'olnntan'lv quit biting, but stay in the same place for hours 

 (on horses especially) until literally pulled off. In this way 

 they travel for miles on horses and cattle. In September of 

 this year they made cotton picking and road work impossible 

 in places here. They stay in grass and bushes and as soon as 

 these are disturbed they sally forth in swarms. I have sat 

 quietly for an hour where I knew them to be abundant and 

 scarcely saw one, but when I would get up and walk around 

 and shake up the grass and bushes and then sit down again 

 they would immediately cover me. This is partly true of all 

 the out-of-doors mosquitoes. Abundant at intervals from last 

 of May till October. 



Aedes discrucians Walker. 



Either the entire fourth tarsal may be white, or only a 

 broad basal band, and often this only shows from above. 

 Habits and habitat about same assdyt. Scarce here and taken 

 generally in thickets and woods. A greedy biter, though not 

 as bad as sayi. Taken at about the same time of the season 

 and under pretty much the same circumstances. 



Aedes sayi Dyar & Knab. 



Very abundant in thickets and woods. I have taken them 

 also in grass in the business and residence portion of Little 

 Rock. Breeds in transient pools in fields and woods. Always 

 more abundant after rains. Taken in the cotton and corn 

 fields and about dwellings, but prefers woods and thickets. 

 Does not enter dwellings to any extent, and then only by ac- 

 cident, apparently. One of the most persistent as well as 



