REPORT ON MOSQUITOES. 191 



six scales on each side attached to a separate band — fringe-hke — 

 in the form of a semicircle. The individual scale (fig. 56, 9) is 

 somewhat variable but always has three large spines, the longest 

 forming the apex ; the smaller spines border the sides and there 

 may be one, two, though possibly none between the larger ones. 

 The anal siphon (fig. 56. 7) is yellow, moderate in length, usually 

 stout and broadly dilated near the base, though specimens occur 

 where the dilation is scarcely perceptible. The double row of 

 spines does not extend half the length of the siphon and con- 

 sists of but three to five spines in each row, with small teeth 

 crowded at the base, often on both sides (fig. 56, 8). In young 

 larvae the siphon is ringed near the middle, the basal half being- 

 whitish and the apical half dark gray. The ninth segment is 

 longer than broad, with a small barred area on the ventral part 

 of the posterior margin from which arise rather short tufts of 

 hair, and smaller tufts on the ventral margin beneath the barred 

 area. The dorsal tufts are short, each with one hair much longer 

 than the rest. The anal gills are long and taper to a fine point 

 with the trachea a mere hair line, to be seen in the living larvse. 



Habits of the Bcirly Stages. 



In New Brunswick the only breeding places known are on the 

 College Farm, where, in woodland pools, a few specimens were 

 taken, and two or three small temporary lot pools not far from 

 my house. In the woods the species was associated with syhes- 

 tris, serratiis and iiiusicits; in the lot pools with pipiens and res- 

 fiians. The lot pools were located by Mr. Dickerson in 1902, 

 and these wrigglers could be found there at almost all times after 

 the last days of July. In 1904 the same pools were collected over 

 July 28th and some thirty full grown larvae were found asso- 

 ciated with thousands of C. pipiens, which were collected for 

 experimental purposes. On the 30th, another lot was brought 

 in, mostly in the pupal stage. August 9th, the pools were again 

 loaded with full grown larvae and pupae, and as specimens were 

 needed and the pools were small, on the loth they were collected 

 clean. At that date there were no young larvae and the effort was 

 to clean out the entire crop. August 17th the pools were again 

 filled by larvae of all sizes up to the pupal stage, making less than 

 seven days from the hatching of the ego; to the pupal stage. The 

 latter stage rarely last over twenty-four hours, so that a brood 

 may come to maturity in a little over one week. August 23d all 

 stag'es were again found, from young just out of the eg;g to the 

 pupa. 



