134 THE MOSQUITOES OF NEW JERSEY 



turned out a few more examples mingled with "vexans and that com- 

 pletes the record. As compared with the other larvae that of trivittatus 

 was always rare and only a very few examples were obtained for preser- 

 vation. It seems to be one of those species in which the larvae develop 

 very evenly, for only the full grown wrigglers and pupae were col- 

 lected. The breeding pools were the usual depressions occurring in 

 woodland ; kept moist by shade and small springs, so as to fill readily 

 during a heavy rain and kept up by the same factors long enough to 

 bring even the slow-growing larvae to maturity. Nothing is definitely 

 known as to the length of any period. 



MISCELLANEOUS GROUP 



[The Miscellaneous Group includes many species not at this time of 

 economic importance. Such species as Psorophora ciliata Fabricius, the 

 largest mosquito occurring in New Jersey, is not economically impor- 

 tant because of its limited numbers, others because they breed in re- 

 mote places and do not move much into populated territory. Never- 

 theless, a knowledge of them is necessary because conditions may so 

 change as to render them economically important.] 



Aedes im/placahilis Walker 

 The Red- Backed Mosquito 



DISTRIBUTION AND CHARACTERIZATION 



[Northeastern United States. This mosquito is recorded from Platts- 

 burg, New York, larvae April 24, 1905 (H. G. Dyar) ; Dublin, New 

 Hampshire, May, June, 1909 (A. Busck) ; Springfield, Massachusetts, 

 April 28, 1903 (F. Knab) ; Wilbraham, Massachusetts, June 4, 1903 

 (F. Knab) ; Mount Tom, Massachusetts, May 6, 1903 (F. Knab). 

 Reported also from Orange Mountains and New Brunswick, New Jer- 

 sey (Morse). Trap records from 1932 to 1936 inclusive indicate no 

 collections of this mosquito. 



It seems probable that Aedes implacabilis has a wider range than 

 indicated by these localities. Its distribution seems northern, and it is 

 probably due to chance only that no specimens have appeared in col- 

 lections from Canada. This species has been referred to by several 

 American authors under the name punctor. 



Medium sized with dark brown thorax bearing two median brown 

 lines. Abdomen black with broad basal white bands ; legs black with 

 bronzy reflections.] 



