46 ENTOMOLOGICAL SOCIETY 



The woods and grass swarmed with Culex sollicitans and C. 

 cantans, while Culex and Anopheles entered the house in some 

 numbers in spite of screens. Larvae were found in various situa 

 tions, as will be described in detail in the following notes. No 

 larvae were seen, however, in any body of water large enough to 

 be roughened by the wind, nor in any water so shaded by the 

 woods as to be dark. Several suspicious looking pools hidden 

 in the dark woods were barren of mosquito larvae, though the 

 adults swarmed there as they did almost everywhere else. 



Anopheles crucians Wied. 



This was the commonest Anopheles in the house, though not 

 bred from collected larvae. Several examples were taken in the 

 act of biting. 



Anopheles punctipennis Say. 



Not common as adult, though the larvae occurred in numbers 

 with the following species in nearly equal proportion. Dr. 

 Howard states in his publications on mosquitoes that the larva 

 differs from that of maculipennis, "chiefly in the markings of the 

 head." I was not able, however, to differentiate them by this or 

 any other very definite character. The Anopheles larvae occur 

 in two forms, one with the back spotted with white, the other un 

 spotted. These were separated, but gave both species in nearly 

 equal proportion. A puddle formed by rain at the side of the 

 road contained a pure colony of punctipennis, and these were 

 almost entirely of the white spotted form. This particular colony 

 was entirely killed by the drying of the puddle shortly after I had 

 collected from it. A similar puddle near Washington, D. C., 

 contained this species, unmixed. 



Anopheles maculipennis Meig. 



The larvae occurred more or less commonly in nearly every pool 

 and pond, and even in the blacksmith's rain-water barrel. A few 

 could be found along the stagnant margins of swiftly flowing 

 streams. A. punctipennis usually occurred mixed, in fact it was 

 generally slightly the more abundant of the two. The Anopheles 

 imagoes did not fly about the streams where their larvae occurred, 

 at least they did not attempt to bite, whereas swarms of Culex 

 occurred in such localities, especially C. sollicitans, whose breed 

 ing places were miles away. The maculation of the Anopheles 

 larva varies from none to a few dots or a complete band of white 

 pigment down the back. This pigment is in the skin, and is often 

 very white like porcelain. The larvae seem darker as a rule than 

 punctipennis, and the white spots, when present, are more con 

 trasted. The heads seem to me to be practically identical. 



