AEDES CANADENSIS 649 



to the stem of the second posterior cell; posterior cross-vein about its own length 

 distant from the mid cross-vein. 



Halteres with almost a white stem and a deep black knob. 



Length. — 6 to 6.5 mm. 



(J. Head black, with black upright forked scales behind and a few ochraceous 

 ones in front and pale golden curved scales; on the sides are pure-white flat scales; 

 antennae banded brown and white with chestnut-brown plumes; proboscis deep dull 

 purplish-black; palpi deep brown basally, black towards the apex, the last joint but 

 one with a basal band of white scales, hair-tufts dark brown. 



Thorax deep brown, denuded; scutellum deep brown, median lobe with a single 

 row of bristles; pleurae deep chestnut-brown, with patches of white scales. 



Abdomen steely-black, with dusky brownish-black scales, the last few segments 

 with basal white lateral patches; basal lobes of male genitalia black scaled and hairy. 



Wings with the first sub-marginal cell a little longer and considerably narrower 

 than the second posterior cell, its base a little nearer the apex of the wing than that 

 of the second posterior, its stem not quite as long as the cell; stem of the second pos- 

 terior cell equal in length to its cell; posterior cross-vein distant about twice Its own 

 length from the mid cross-vein. 



Length. — 5 mm. 



Habitat. — De Grassi Point, Lake Simcoe, Ontario (E. M. Walker) (66). 



Time of capture. — June and July. 



Observations. — A very distinct species, In which the legs are very character- 

 istically marked, the last tarsal joint of the hind legs being entirely dull white and 

 the banding of the legs involving both sides of the joints. The dusky scaled 

 abdomen, with the creamy-white basal lateral patches, Is also very characteristic. 

 It can thus be easily separated from any other North American species. A single 

 male only was received, but a good series of $'s. The specimens were taken in such 

 localities as the following: "From a low wood of arbor vitse, spruce, balsam, fir, 

 &c."; "common in rich woods and swamps"; also from dry and low woods and 

 grass; grass and low herbs in a wood of aspen, maple, balsam, &c., according to the 

 notes sent by the collector. 



OkEGINAL DeSCBIPTION of CtTLEX NIVITAESIS : 



2. — Black, the thorax and scutellum brown, the first antennal joint, halteres, 

 coxae, femora, and tibiae yellow, the hind tarsi white and with a faint median 

 brownish band on the three middle joints. Scales of palpi brown, those on the basal 

 portion yellow, on the apex white; scales of upper part of occiput golden yellow, on 

 the sides and lower part chiefly white, those on the mesonotum golden yellow, on 

 the abdomen purple, those on the extreme bases and front angles of the segments 

 yellowish. Including all on the seventh and following segments, those on the venter 

 white. Scales of legs brown and whitish, not forming bands or spots, those on the 

 first two pairs of tarsi brown and with white ones on the narrow bases and broad 

 apices of the first two joints as well as on the narrow bases of the remaining joints 

 of the middle tarsi; scales of the hind tarsi almost wholly white; all tarsal claws 

 toothed. Wings grayish hyaline, the scales brown, lateral scales of the veins narrow 

 and almost linear, petiole of first submarginal cell about two-thirds as long as this 

 cell, hind cross-vein about its own length from the small. Length 4 mm. 



J'. — Palpi slender, black, a broad band in middle of first joint and bases of the 

 following joints white, proboscis reaching almost to apex of penultimate joint of 

 palpi. Front and middle tarsi with one of their claws bidentate and the other 

 unldentate, hind tarsal claws also unidentate; some of the brown bands on the hind 

 tarsi quite distinct, especially the one on the third joint. Petiole of the first sub- 

 marginal cell almost as long as that cell. Length 4.5 mm. Otherwise as in the 

 female. 



Paterson, New Jersey, May 12. A specimen of each sex sjubmitted by Dr. J. B. 

 Smith, to whom they have been returned. 



Desceiption of Femaxe, Male, Laeva, and Egg of Aedes canadensis : 



Female. — Proboscis rather long, cylindrical, uniform, tip scarcely widened, 

 labellae conically tapered; vestiture black with a slight bluish luster; setae very 

 small, curved, black, those on the labellse more prominently outstanding. Palpi 

 short, stout, about one-fifth the length of the proboscis, the vestiture of bluish- 

 black scales mixed with a few white ones and many rather short black setae, the 

 tips narrowly white scaled. Antennae with the joints subequal, black, rugose, 

 pilose, the second joint a little longer and pale at extreme base; tori sub- 

 spherical, with a cup-shaped apical excavation, pale yellowish, with a group of 

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