18 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



painful biters. Also troublesome to stock. I have let one 

 settle down on my hand and get to biting and then picked its 

 legs off one by one without disturbing it in the least. One 

 will escape from the mosquito trap and settle at once on the 

 hand and commence biting. Males generally appear first, fe- 

 males later. After first weeks of May, locally abundant until 

 frost. 



Aedes horridus Dyar & Knab. 



Habits and habitat about same as sayi. Very much more 

 scarce. 



Aedes tormentor Dyar & Knab. 



Scarce as a rule, though locally abundant at times. In woods 

 and thickets. A persistent biter. Breeds in water containing 

 vegetation, transient and otherwise. Sometimes seen about 

 dwellings, though it does not enter them to any extent. A 

 summer mosquito, though some taken as early as May and as 

 late as October. 



Aedes dupreei Coquillett. 



Habitat about same as tormentor. I have not found them 

 to bite. Scarcer than tormentor. Only taken occasionally at 

 about same time and places as tormentor. 



Aedes infirmatus Dyar & Knab. 



Locally abundant at intervals. Mostly after rains. In 

 woods and thickets. Sometimes about dwellings. Does not 

 enter houses extensively. A summer mosquito. Taken at 

 about same time and in same places as tormentor. A per- 

 sistent biter ; quite annoying where it is plentiful. 



Aedes pretans Grossbeck.* 



An early mosquito, sometimes abundant in suitable places. 

 In thickets and grassy places and about dwellings. Does not 

 enter houses. Breeds in transient grassy pools in fields and 

 thickets. An eager biter. Taken in March, April, and May, 

 and after rains throughout the summer, though only sparingly 

 after May. Males appear first and are at all times more 

 plentiful than the females. 



Aedes sylvestris Theobald. 



Very abundant and at times annoying, though when you 

 consider how abundant it really is, it does not seem very blood- 



* No specimens sent. to Washington. H. G. DYAR. 



