460 MOSQUITOES OF NOETH AMERICA 



inserted terminal claw ; a rounded lobe within base of side-piece bearing a row 

 of stiff setffi. Harpes simple, curved, with revolute margins. Harpagones small, 

 curved, simple. Unci forming a slender, elongated cone reaching beyond middle 

 of harpes. Basal lobes short, rounded, bearing several seta3. 



Larva, Stage IV (see figure of the entire larva, plate 49). Head square, 

 transverse, a notch at insertions of antennae, the front margin rounded, flat 

 before; eyes large, transverse. Antennae large, cylindrical, tapered without, 

 densely spined ; a large tuft at outer third ; apical setae very long, two some dis- 

 tance before tip, a long and a short one and a small digit at tip. Upper pair of 

 dorsal head-hairs quadruple, lower pair double; ante-antennal tuft multiple. 

 Mental plate triangular, a central tooth and nine on each side, becoming pro- 

 gressively larger and more remote toward base, except the last two which are very 

 small and distantly spaced. Mandible quadrangular, elongate; two filaments 

 before the tip arising in a thorn-shaped notch -udth two small hairs ; an outer row 

 of cilia from a collar; a row of little tufts along the outer edge arising from 

 slight transverse ridges ; dentition of four teeth on a process, the first the largest, 

 with two sharp teeth without, a small tooth at base, a slender filament and a long 

 row of feathered hairs vrithin ; a long conical tooth below ; further below a 

 furcate process bearing tufts of hair ; basal angle long and slender ; a long row 

 of hairs toward the base. Maxilla conical, divided by a suture ; inner half hairy 

 toward base, and a group of stiff hairs at middle ; a tuft of very long hairs at 

 apex running along the suture, outer half -ndth hair toward the suture, the two 

 filaments small. Palpus small, with four terminal digits, the two next the 

 maxilla longest. Thorax rounded, wider than long; hairs abundant, very long, 

 the anterior prothoracic tufts exceeding the head. Anterior abdominal seg- 

 ments short, posterior ones elongated; lateral tufts of first two segments 

 multiple, a single long hair on third to sixth, not shorter posteriorly, very short 

 on seventh segment. Tracheal tubes narrow, linear, angled in the eighth seg- 

 ment. Air-tube long, slender, straight, scarcely tapered, about six times as 

 long as wide ; pecten of few teeth on basal fourth, the single teeth a short spine 

 with very broad base and four long basal spines ; no hairs on the tube. Lateral 

 comb of eighth segment of numerous scales in a very large triangular patch, the 

 single scales with broadly expanded apex fringed "uath short spines. Anal seg- 

 ment nearly twice as long as wide, ringed by the plate ; dorsal hairs a tuft and 

 long hair on each side ; a single lateral hair ; ventral brush well developed, pre- 

 ceded by a row of short tufts along the ventral line to the base and arising from 

 little holes in the chitin. Anal gills slender, about as long as the segment, 

 pointed. 



The larvae occur in cold springs or bogs early in the season, always in small 

 numbers. There is but one annual generation, the larvae hatching with the melt- 

 ing of the snow and maturing early. The egg is unknown, but probably is de- 

 posited singly and the late summer and all winter passed in this stage. The 

 adult is rare, only single specimens being taken, so that its habits are unknown. 



Northern New York and New England, westward in Canada, southward in 

 elevated localities. 



Center Harbor, New Hampshire, larvje in an old barrel in swampy spring, 

 May, 1902 (H. G. Dyar) ; Springfield, Massachusetts, May 21, 22, 23, 24, 27, 

 28, 29, 1903 (F. Knab) ; Suffield, Connecticut, May 12, 1903 (F. Knab) ; 

 Tupper Lake, New York, larva in a cold swamp, adult issued August 16, 1905 

 (H. G. Dyar) ; Saxeville, Wisconsin, May, 1910 (B. K. Miller) ; Kaslo, British 

 Columbia, a larva in a cold springy swamp. May 29, 1903 (H. G. Dyar) ; Culvers 

 Lake, New Jersey, May 29, 1908 (in collection of J. B. Smith). Also recorded 

 from Branford, Connecticut (E. P. Felt). 



