104 N. J. Agricultural Experiment Station, Bulletin 348 



within the borders of the state and that further studies are certain 

 to modify ideas of control. The ordinary evening collection does 

 not usually show the presence of A. quadrimaculatus except as the 

 collector is located very close to the place of breeding. This is true 

 although the distribution of the mosquito may be general over the 

 territory when collections are being made. The best place to look 

 for specimens of A. quadrimaculatus is inside the houses, where it 

 sometimes is found concentrated although it may be scarce outside. 



The Swamp-Mosquito Group 



This is not a well defined set of species, for some members of the 

 group take on the habits at times of woodland species. Acdes 

 sylvestris Theob. is probably the most important and certainly the 

 most typical member of the group. Mansonia pcrturhans Wlk. 

 comes next in point of importance. 



The Swamp Mosquito 



{Acdcs sylvestris Theob.) 



Recognition Marks 



This species is a medium-sized or small mosquito with unhanded 

 beak and unspotted wings. The tarsi are narrowly white banded at 

 the base. The abdominal segments have bands of pure white at 

 their bases, which, with the exception of the first two and the last 

 two, are so strongly constricted at their centers as to appear almost 

 divided. 



The larva is variable in color but usually shows the head marked 

 with spots, the arrangement of which is characteristic (fig. 65). Its 

 antennae rise from the sides of the anterior part of the head. The 

 breathing tube is 2^4 to 3 times as long as broad. There are 4 

 tracheal gills. The 10 to 15 scales on each side of the eighth abdomi- 

 nal segment are individually separate and arranged in a partially 

 double row. 



Importance 



This mosquito occurs in all parts of the state but is most abund- 

 ant in the non-sandy regions. Its abundance is subject to great 



