REPORT ON MOSQUITOES. 279 



on all feet, equal in size and, like the posterior ones of the male, 

 have a single tooth near the base. 



The abdomen is black above, with purplish reflections, pale 

 yellow beneath, the segments marked with lateral white spots 

 extending upon the dorsal surface at the front angles of the 

 apical segments. 



Habits of the Adult. 



This is distinctly a handsome species, readily recognized by the 

 broad silvery stripe on the back. It was originally described 

 from South America, but occurs throughout New Jersey, 

 though nowhere in large numbers. The earliest record is near 

 Livingston Park, New Brunswick, June 23d, wdien one example 

 was taken in company with eighteen canadensis and seven 

 squamiger, all in attempting to bite. Several times, later in the 

 season, specimens w^ere taken in this wood and, except for some 

 examples taken at Cape May by Mr. Viereck, there were no other 

 adults captured. Little is positively known, therefore, of the 

 habits of the adults and that little is not especially to its dis- 

 credit. It bites, of course, when its haunts are invaded, but it 

 lives in low swampy woods where rubber boots are desirable 

 if not necessary at most periods and where few persons ever go. 

 There is absolutely no record of its capture in towns or houses, 

 hence it cannot be included among the pestiferous forms. 



Description of the Larva. 



The larva is figured on plate 86 with details of structure. It 

 is a very robust wriggler and when full grown is 6-7 mm. = .24- 

 .28 of an inch in length, excluding the anal siphon. The head is 

 dark brown in color, with darker diffused blotches on the vertex, 

 widest at the eyes, tapering anteriorly and somewhat flattened in 

 front. Four hairs are on the anterior part of the vertex, each 

 arising from separate pits, one pair in advance of the other, and 

 there is a tuft of five or six hairs at the base of each antenna. 

 The antenna (fig. 86, 4) is short, not quite half the length of the 

 head, thickest at the basal third and terminated by one long spine, 

 three smaller ones and a small joint. A hair tuft of moderate 

 length issues from the shaft at about the middle, and the surface 

 is set with small, stout spines. The rotary mouth brushes have 

 simple and pectinated hairs, the pectinated ones short and curved 

 in the more central part and obscured by the long simple ones. 

 The mentum (fig. 86, 7) is triangular, with fifteen or sixteen 



