THE COMMON 3I0SQUIT0 77 



species of Culex, I have been able to determine, by exam- 

 ination of the locality labels in the collection of the United 

 States National Museum, that in almost every locality in 

 the United States there may be found five or six siDecies 

 of this genus. The commoner forms are Oidex conso- 

 brbius, C. stimidans, C. 2)erturla?is, C. ^j>?<;^^(?/^,s, and C im- 

 p'lger, and these forms are found almost all over the 

 country, from New England to Texas, and even to 

 southern California. C, coasohrinus is perhaps a more 

 northern form than the others, and is one of the species 

 which occurs in Alaska. It is also found in the White 

 Mountains in New Hampshire and in the Catskill Moun- 

 tains in New York, and occurs on the Saskatchewan River 

 in British America, and in Minnesota and North Dakota. 

 We have in this country no species of the genus Culex 

 which inhabits really salt water and, in fact, no species of 

 mosquito can definitely be said to occur in water as salt 

 as the ocean. Three or four Australian species are said 

 to live in salt water, but, so far as I have been able to 

 learn, there is not sufficient substantiality in this record. 

 Oulex salinus of Europe is also said to breed in salt 

 water. We have in the United States, however, a species 

 of Culex which occurs in brackish water, that is to say, it 

 is able to breed in, and i:)refers apparently to breed in, 

 the brackish swamps which are occasionally overflowed 

 at very high tides, though not affected by the daily 

 high tide. This is Culex sollicitcms (see Fig. 1), a small 

 gray mosquito which has its legs banded with black and 

 white. It is ordinarily known as the ring-legged mos- 

 quito and is the most common form on the Atlantic sea- 



