OF WASHINGTON. 145 



Uranotcenia sapphirina O.-S. 



Larvae were found rather sparsely in a marshy pool filled with 

 grass and algae on July 25th, in all stages of development. 

 They were in company with Anopheles punctipennis and Culex 

 territans. The water of the pool was clear, but stagnant, the 

 general environment being much as in the places where I found 

 this species at Bellport, N. Y. (Jn. N. Y. Ent. Soc., ix, 179, 

 1902 ; Proc. Ent. Soc. Wash., v., 49, 1902). My account of the 

 larva in the New York Journal contains an error in the descrip 

 tion of the first stage. The ventral tuft of the anal segment is 

 stated to be present, but it is really absent, not appearing until 

 after the first molt. The figure on the plate is correct. The 

 pupa of this species is as small as that of Culex territans* but 

 has even longer air tubes. It may be recognized by this char 

 acter from other mosquitoes. 



Aedes fuscus O.-S. 



The species was not common on the wing. An occasional 

 female came from time to time in the woods and was taken in 

 the act of biting, continuing all summer. But many specimens 

 were raised from Iarva3. The larvaa occur freely in temporary 

 pools, especially road-side puddles, and are only occasionally 

 found in permanent water. They were in company with Culex 

 canadcnsis and C. sylvestris and, like them, possess a short 

 breathing tube, which seems to be the structure adapted for larvae 

 living in temporary pools. The larvae with long tubes generally 

 live in permanent water. The larva of Aedes fuscus does not 

 differ in structure from Culex. In fact it so nearly resembles C. 

 sylvestris in all characters that they are difficult to differentiate 

 specifically. 



The following synoptic table may replace the middle portion 

 of the table I presented last year (Proc. Ent. Soc. Wash., v.,5i, 

 1902), the part dealing with Culex and Stegomyia. Seven spe 

 cies are now added and some of those before contained are more 

 accurately differentiated. 



Air tube long, about four times as long as broad at base. 

 Antennae with the tuft bejond the middle of the joint. 



Tube very long and slender, six times as long as wide or more ; anten 

 nae white banded. 



Tube concave, the tip wider than the terminal por 

 tion. Spines of tube mostly with a single basal 



branch Culex territans. 



Tube regularly tapered, smallest at tip. Spines of 



tube 3 to 4-branched Culex nigritulu*. 



Tube moderate, five times as long as wide, or less ; 



antennae not conspicuously white marked. 

 Anal segment without hair tufts anteriorly of the 

 transversely barred area. 



