i8o AGRICULTURAL EXPERIMENT STATION. 



together, but that of course is subject to any amount of variation 

 under varying conditions. Mr. Brehme has found pools swarm- 

 ing with small Culex sylvestris and a goodly population of Psor- 

 ophora among them. A few days later only Psorophora re- 

 mained and these were scattered and difficult to find. There is 

 no greater enemy of or more effective check to, other mosquito 

 larvae, than Psorophora, and its rank as a pest is not sufficiently 

 high to counter-balance the benefits received from it. Unfor- 

 tunately it has its limitations. It occurs only in temporary pools 

 or in pools which have been dried out prevously to kill off all fish 

 and similar enemies, and its habits of attacking and devouring its 

 own kind whenever opportunity offers, prevents anything like a 

 great increase in its numbers. 



As a rule, perhaps, woodland pools or those at the borders of 

 woodland are favored as breeding places, but I have found and 

 received lar\'ce from more open pools, even from entirely unshel- 

 tered holes near the banks of the Raritan River, so that it can 

 scarcely be said that this is a real woodland mosquito. 



Mr. Brehme found full grown larvae and pupje on Bloomfield 

 Avenue, Newark, June 25, and in the same place as late as Sep- 

 tember 25, though at the latter date there were no pupae, only full 

 grown larvae. July 20, Mr. Grossbeck collected a few specimens 

 among a lot of Culices in a pool near Paterson. Two days later 

 only the Psorophora remained. July 24, Mr. Seal sent in some 

 larvae from Delair, associated with Culex confinis. On the 28th 

 Mr. Grossbeck found them with sylvestris at Little Ferry and 

 August 10 there were a few taken by him at Cherry Hill. Aside 

 from these records, there is scarcely a county in the State from 

 which the early stages have not been sent in. 



/ JANTHINOSOMA MUSICA, SAY. 



The Big Wood Mosquito. 



A rather large or medium sized mosquito, black with deep 

 purple reflections. The beak and legs are black, the hind legs 

 heavily scaled and the last two tarsal joints and part of the pre- 

 ceding one white. The thorax with pale yellowish scales scat- 

 tered over a black background and the abdomen unhanded. A 

 very characteristic mosquito, recognized at a glance by the metal- 

 lic purple reflections and the white hind feet. 



