20 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Culiseta inornatus Williston.* 



A winter mosquito, quite abundant in season. Bites fre- 

 quently, preferring to bite horses and cattle to human beings. 

 Very annoying to horses. Bites night or day, mostly evening 

 and night. Breeds in rain-barrels and large and small perma- 

 nent and transient bodies of water. Seems to prefer open 

 fields to woods. Very early, January, February, March, 

 and April. Not taken after May until October. Also No- 

 vember and December. Larvae and pupae found in February 

 during warm weather. They swarm about low weeds at dusk, 

 the swarms composed for the most part of males. 



Culex peccator Dyar & Knab. 



Found in hollow trees and caves. Abundant in such places, 

 though seldom taken elsewhere. They do not seem to enter 

 houses or bite. I have been unable to find where they breed 

 or secure larvae. Taken from June to October. 



Culex abominator Dyar & Knab. 



Very abundant and troublesome. Taken in woods, out- 

 houses, and even in dwellings. Always in company with .-I. 

 quadrimaculatus . Breeds in permanent bodies of water, pre- 

 ferring those thickly overgrown with aquatic plants. Breeds 

 in company with A. c/iiadn'mciciilatus. Taken from last 

 weeks in March till after fro^t. Females appear first ; males 

 after June 10, generally. 



Culex tarsalis Coquillett. 



Scarce. Taken in weeds and about houses in early spring 

 and in fall. Seldom taken in summer. I know very little of 

 their habits and do not know where they breed, except some 

 times in rain-barrels. 



Bancroftia signifer Coquillett. 



Abundant near breeding-holes. Very secretive, hiding in 

 trees and especially fond of hiding in crevices in the bark of 

 trees. Breeds in tree-holes. Enters dwellings and bites fre- 

 quently. Taken in suitable places throughout spring and 

 summer. About dwellings in spring and fall. Males generally 

 appear first. 



* .Specimens not sent to Washington, but I have no doubt of the 

 correctness of the determination. H. G. DYAR. 



