EXPERIMENT STATION EEPORT. 675 



Habits. 



This species, like Culex iriseriatus, is confined to the water con- 

 tained in tree-holes. It was described from Plumber's Island, Md. 

 Mr. Dickerson found a few larvae associated with those of C. triserioh 

 ius and C. signifer in a' tree-hole at Chester, Morris county, September 

 Gth. The same day a male A. harberi emerged from a pupa, with 

 specimens of its associates. On the 8th, one female emerged and on 

 the 11th, — another, the last in the lot, though triseriatus and signifer 

 hatched in large numbers. Another visit to the tree was made Sep- 

 tember 9th, but no larvae were found and only a single male hatched 

 September 10th, from a collected pupa. 



The larvae rarely descend to the bottom, but like their allies main- 

 tain a horizontal position on the surface of the water. Tliis would 

 suggest a diet of floating particles of vegetable matter; Imt Dr. Dyar 

 says that they are predaceous and the mandibles seem to bear out this 

 statement. He also says that the winter is passed in the larval stage, 

 a point which we have been unable to verify and which is not in accord 

 with the habits of the other species of this genus occurring in the 

 State. 



Psorophora ciliata Fabr. (The Fringe-Legged Mosquito). — This 

 mosquito has been rare throughout the season, though Mr. Brelime took 

 a number of the larvge near Newark in the middle of June, the first 

 adults emerging on the 26th of that month. 



Janthinosoma mvsica Say. (The Big Wood Mosquito). — This 

 species was not taken in any stages, its breeding places in the Great 

 Piece meadow having dried out completely. 



Culex jamaicensis Theob. (The ^potted-Legged Mosquito). — This 

 mosquito was taken commonly in the larval stage, breeding in the lot 

 pools at New Brunswick ; but curiously enough the adults seemed not 

 to be troublesome at the near])y dwellings. 



Culex discolor Coq. (The Mottled ]\Iosquito). — Mr. Seal collected 

 full-grown larvae and pupa of this species at Delair, Camden county, 

 in company with C. pipiens, August loth, — the latest record of the 

 occurrence of larvte thus far in hand. The larvae were attacked by a 

 fungus and placed in alcohol. Adults emerged from pupae on 

 the three days following the 16th. August 8th was the latest previous 

 record for adults. 



Mr. Seal writes that he found larva? in two temporary pools at 

 Delair, where, like Psorophora, they occur only when certain con- 



