152 AGRICULTURAL EXPERIMENT STATION. 



the first joint of the tarsus, or foot, is much shorter than the 

 second. 



3. Corethrella, in which the antennae are evenly covered with 

 hair, not beaded; the palpi, or moiith feelers are short in both 

 sexes, and the first joint of the tarsus, or foot, is longer than 

 the second. 



The. Corcthrini are usually light yellow in color, have a some- 

 what humpbacked appearance and do^ not look like mosquitoes 

 at all to the average observer. As thev do not bite and are rarely 

 at all abundant they do not attract attention nor do they need 

 much consideration here. 



b. TABLES OF THE SPECIES EOUND IN NEW JERSEY. 



After the moscjuito in hand has been placed in its proper genus, 

 the work is done except for the members of the genera Anopheles 

 and Cidex, for in no other is there more than one New Jersey 

 species. To facilitate recognition of the species of Ajiopheles and 

 Ciilex they are arranged in the form of a synoptic table in which 

 all those having similar characters are grouped together, as e. g., 

 those having the beak banded, or the legs banded, and the like. 

 Other characters are then used to separate the species of each 

 group until each species stands by itself as nearly as possible. By 

 using this "table" or "key" the specimen may be usually identi- 

 fied, or if there remains a doubt, it will need reference only to a 

 few descriptions to make certain. 



TABLE TO DETERMINE THE SPECIES OF ANOPHELES 



Palpi uniformly dark brown. 



Wings with two white spots on the front margin of the 



wing; last vein wholly white punctipcnnis 



Wings with four distinct brown spots ; last vein wholly 



dark brown, maciilipciinis 



Palpi white marked at base of joints; last vein white, marked 



with three black spots, crucians 



TABLE TO DETERMINE THE SPECIES OF CULEX."^ 



Series A, in which the feet are white or yellowish banded. 

 I. The beak has a more or less distinct white band or ring at 

 or near its middle. 



a. The abdomen has a yellowish stripe down its middle, 



and the sides of the thorax are white below a 



black edging, sollicitans 



b. The abdomen has no longitudinal stripe ; the sides of 



the thorax are not white. 

 I. The wings are spotted, the body is mottled and 



variegated with brown, discolor 



* See figure i, p. 15, for an illustration of the characters used in this table. 



