REPORT ON MOSQUITOES. 323 



pectinated. There is very little variation in the mentnm and it 

 is usually two and one-half times as broad as long, as shown in 

 figure loi, 6. There are from seven to nine large teeth on each 

 side of the apex (eight being the average), which have a ten- 

 dency to point toward the centre. The mandible (fig. loi, 9) 

 is triangular, rounded at the corners, the dorsal part with three 

 long', curved spines and a number of short ones, the outer part 

 of the base with a patch of fine hair-like spines. The maxillary 

 palpus (fig. loi, 4) has a moderate tuft of long hair on the apex 

 and a number of pectinated hairs on the base. The basal joint is 

 very small, with four spines at the apex. 



The thorax is angulated but slightly, transversely oblong and 

 with numerous hairs arising from tubercles at the angles of the 

 sides; the anterior margin has some very long- stout hairs extend- 

 ing beyond the head, the most central ones being grouped at the 

 base, but issuing' from separate tubercles, the more lateral ones 

 separated at the base, each with one or two hairs. 



The abdominal segments from i to 7 are subcjuadrate in form, 

 the anterior two with lateral tufts of four or five hairs each, the 

 following- four with tufts of two hairs, while those of the seventh 

 and eighth are very much reduced. The scales composing the 

 combs of the eighth segment are greatly elongated (fig. loi, 8) 

 from seventeen to twenty-six in number, arranged in a single 

 row, as in figure loi, 2. The anal siphon is five or six times as 

 long as broad, tapering slightly toward the apex, dark brown, 

 black tipped, with a double row of very small, simple or one- 

 toothed spines, eleven to fifteen in each row. On the ventral 

 border there is a row of about thirteen small, fine-haired tufts 

 extending its entire length. The ninth segment is consider- 

 able- longer than wdde, with the ten or twelve tufts on the dorsal 

 part of the apical margin also short, each with one very long hair. 

 The anal gills are as long or nearly as long as the ninth segment. 



Habits of the Burly Stages. 



From, time to time Mr. Brakeley had mentioned in his letters 

 a "bronze wrigpler" which occurred in woodland springs, very 

 late in the season, specimens being taken up to the middle of 

 November; but no attempt was made to breed it until, after a 

 specimen had been sent to Dr. Dyar, who pronounced it iiiel- 

 anurus, a species originally taken by him in New Hampshire. In 

 the winter of 1902-03 Mr. Brakeley determined to test his belief 

 that these larvae hibernated in that condition and found that 

 there were several places on his land where they could be found 



