AJEDES SYLVE8TRI8 697 



pair of dorsal head-hairs in threes, lower pair in twos, ante-antennal tufts mul- 

 tiple. Mental plate triangular, about as long as wide, central tooth rounded, 

 nine closely set side-teeth, then two more remote and two others distantly 

 detached. Mandible quadrangular, smooth without; two filaments near tip; 

 an outer row of cilia ; nine filaments on outer edge ; dentition of four teeth on a 

 process, the first and third longer, a filament at base and three short remote 

 teeth, a broad filament and a slender one and three setae within ; process below 

 with a small fork and patches of hair; basal angle with three long setse within; 

 five long stout setse at base. Maxilla elongate hemispherical, divided by a 

 suture ; inner half hairy, a tuft of long hairs at tip, outer half with hairs toward 

 base and with two filaments near the suture and a spine on the other side ; palpus 

 small, with some hairs and four minute irregular digits. Thorax rounded, wider 

 than long ; hairs moderately abundant, not long, the subdorsal prothoracic hairs 

 single and very small. Abdomen stout, anterior segments shorter ; hairs short, 

 the laterals of the first two segments multiple, double on third to fifth, single 

 on sixth ; secondary hairs minute. Tracheal tubes broad, band-shaped, slightly 

 expanded in the segments, narrower posteiiorly. Air-tube stout, tapered on 

 apical half, three times as long as wide ; pecten reaching nearly to middle, the 

 two distal teeth larger and detached ; single tooth a long spine wide at base with 

 four short branches, the outer one larger; a small hair-tuft beyond the pecten 

 near middle of tube. Lateral comb of eighth segment of few scales in an irregu- 

 larly double row; the single scale with an elliptical body, a long stout apical 

 spine and short spines fringing the sides. Anal segment as long as broad, the 

 dorsal plate reaching nearly to ventral line; dorsal tuft a brush and hair on 

 either side ; a single lateral hair ; ventral brush well developed, with short tufts 

 toward the base preceding the barred area. Anal gills moderate, ensiform, 

 longer than the segment. 



Pupa (plate 148, fig. 702). — Thoracic mass subpyriform, slightly compressed 

 behind the head ; small hair-tufts on the anterior part of thoracic dorsum ; air- 

 tubes short, moderately slender, the tip obliquely truncate ; abdomen stout and 

 large in proportion' to the thorax ; hairs well developed, the subdorsal ones long 

 on the fifth and sixth segments ; a small tuft at apical angles of eighth segment. 



Egg (plate 146, fig. 677). — Subfusiform, less convex on one side than on the 

 other, the ends roundedly pointed, a small gelatinous cushion at the micropyle ; 

 sculpture coarsely hexagonal, finer at the ends, elongated in the long diameter. 



The larvae live in temporary pools, appearing at intervals all summer when- 

 ever the pools are filled by rain. In the South the species partakes more of the 

 character of an early spring species, the majority of the specimens developing 

 early from over-wintered eggs ; but this may be due to the fact that the summers 

 are drier, and favorable pools rarer than they are in the North. Professor Smith 

 has studied the species in New Jersey and says : 



" Larvae of this species occur almost everywhere except on the salt marshes 

 or in positively foul water. They are common in woodland pools, tho second to 

 canadensis there, and they are dominant in open swamp areas. In the Passaic 

 Valley, specimens appear in early April and in the Great Piece meadow every 

 pool will be found loaded with larvae at almost all times. The eggs do not seem 

 to hatch evenly in Spring and young larvae will be found when there are already 

 pupae in the same pool. * * * * As early as May 9th, Mr. Grossbeck found 

 adults plentiful in the Garret Mountains, near Paterson, and large larvae in the 

 pools. May 21st, there was a young brood in the pools in the Great Piece 

 Meadows and in early June, broods were found in the woodland pools along the 

 Whippany Eiver near Morristown, and in the Orange Mountains. Late in June 

 full grown larvae were in the pools on the Preakness Mountain, near Paterson, 

 45 



