REPORT ON MOSQUITOES. 335 



tween the Black River Swamp in the north and Lahaway in the 

 south, yet it has been taken on the wing once only, at Metuchen, 

 by Mr. Grossbeck, Alay 7th. When this specimen was brought 

 in, with larvae enough to indicate its rather common occurrence, 

 Mr. Grossbeck was especially directed to seek adults and if pos- 

 sible to ascertain whether they would bite; but no more w-ere 

 taken. It is not probable that it gets very far away from its 

 breeding places and none of the material sent in by Mr. Brake- 

 ley, taken indoors or outdoors, ever contained this species. With 

 such a record, which makes it impossible to determine whether 

 or not the insect can or will bite even under the most favorable 

 conditions, it can hardly be considered a pest. 



Description of the Larva. 



The larva with details of structure is figured on plate figure 

 105. The full grown wriggler measures 7-8 mm.,^.28- 

 .32 of an inch in length excluding the anal siphon and greatly 

 resembles an ordinary Culex canadensis or sylvestris; but is much 

 more slender than either. It is light gi'ay to dark slate gray in 

 color, except the head and anal siphon. The head is broader 

 than long, pale yellow^ or darkly infuscated and has often a 

 brown crescent-shaped mark and several smaller spots in the 

 center of the vertex. Four small hair tufts of four or five hairs 

 each arise from the anterior part of the vertex and two larger 

 tufts are at the base of the antennae. The antenna; (fig. 105, 3) 

 is moderately long, rather slender, tapering evenly tow'ard the 

 apex and with the tuft well below the middle, composed of but 

 five or six hairs which do not reach the apex; the surface is set 

 wath small spines, thickly at the base, sparsely toward the tip, 

 and the apex has three long spines, a short one and a small joint. 

 The rotary mouth brushes (fig. 105, 2) are composed of simple 

 hair, and the mentum (fig. 105, 5) is an almost equilateral tri- 

 angle w'ith nine to thirteen small teeth on each side of the apex. 

 The maxillary palpus (fig. 105. 4) is normal, the apical tuft 

 moderate, the basal joint small and stout, while the surface is 

 thickly covered with patches of hair and some small spines. The 

 mandible (fig. 105, 6) is normal in form but i)eculiar l)y having 

 three curved dorsal spines. 



The thorax is circular in outline with the six lateral hair tufts 

 issuing from acute, darklv infuscated tubercles: there is no tuft 

 on the anterior margin. 



The abdominal segments are subfiuadrate on the anterior seg- 

 ments, becoming elongated posteriorly, with lateral hair tufts 



