^76 XEW JERSEY AGEICULTUBAL COLLEGE 



ditions prevail. Those two holes iisualh- become stcK-ked with Say- 

 omyia alhipes larvae shortly after it rains, and it is only after these 

 disappear that discolor can be found. It appears from this that the 

 discolor fall prey to the predaceous Sayomyia. 



Culex sollicitans Walk. (The AMiite-Banded Salt Marsh ^losquito). 

 — This species did not begin to breed on the salt marshes pf the 

 Newark and Earitan bay districts nntil well along in summer. On 

 Staten Island, just across the Kill, they swarmed, while on the New 

 Jersey meadow not one developed. This peculiar development made 

 it possible to determine definitely, not only that the species came over 

 from Staten Island; but that it extended along the valley of the 

 Bahway and across the first range of the Watchung mountains. It 

 was not until after midsummer that this species became at all com- 

 mon, and it remained, north of the Earitan bay, less abundant than C. 

 cantatoi'. At Barnegat bay and southward, conditions were reversed 

 and sollicitans were plentiful — offensively so in early September. 



Culex perturbans Walk. (The Irritating Mosquito). — The larva of 

 this mosquito still remains undiscovered, though adults have been as 

 common at Lahaway as previously recorded. Some interesting obser- 

 vations, however, were made by Dr. Dyar in the United States and 

 by Dr. Goeldi on a closely allied species in Brazil. The results have 

 been similar, and show that the species must breed naturally under 

 some extremely peculiar conditions, as in neither ease were larv» 

 obtained from eggs brought beyond the first stage of development. 



Dr. Dyar secured from captured females eggs which were laid in 

 boat-shaped masses of aboitt 150 each, similar to those of Culex 

 pipiens. The young larva? have very long antennie. with a single 

 hair representing the tuft at the basal third. The comb of the eighth 

 segment is a single row of short, pointed spines. The anal siphon is 

 constricted at the outer third, the terminal portion linear, and ending- 

 in a bunch of stout, recurved hooks, the basal portion is slightly 

 constricted centrally, bearing a long hair on each side, but no pecten. 



Concerning their habits, Dr. Dyar says: "The larvie refused to- 

 feed. They did not use the mouth brushes perceptibly, but lay at the 

 bottom of the water absolutely motionless for hours and days together. 

 Some specimens we thought dead : but on transferring them to a slide, 

 they wriggled in a fairly lively manner, pushing the curiously shaped 

 air tube as if to fasten it to some object." 



Mr. Brakeley sent in a male from Lahaway, June -ith. the first 

 captured there, and the belief that the species is a migrant therefore 



