AEDES TORTILIS 807 



on the posterior third. A row of black hairs extends from these spots to the posterior 

 margin of the mesothorax. Scutellum with patches of yellow scales on the mid and 

 lateral lobes. Pleura grayish, with patches of white scales and hairs. Metanotum 

 brown. Abdomen black, with narrow basal bands of golden scales and a row of 

 long white hairs along the posterior margin of each segment; lateral areas of silvery 

 scales on the hinder segments; scattered over the dark scaled areas are a number 

 of lighter scales, which form an ill-defined stripe along the middle of the abdomen. 

 Venter white scaled, small apical areas of black scales on the hinder segments at the 

 sides. Legs black: femora white below through the whole length, except near the 

 apex, where there is a black spot; thickly speckled with white scales above, espe- 

 cially near the base; knee spots small. Tibiae, metatarsi and tarsi all ventrally 

 white scaled, a few long bristles on the joints, those along the tibiae longest. Ungues 

 all equal and uniserrate. Wings, veins covered with broad, short, flattened scales, 

 extremities of the upper veins with long narrow ones as well. Upper forked cell 

 narrow and a little longer than the lower. Stem about half its length. Posterior 

 cross vein rather more than its own length distant from the mid cross vein. Halteres 

 with pale stems and knobs. Length, 3.5 mm. 



c?. Proboscis black, nearly as long as the palpi, with scattered yellow scales, 

 especially near the base, apex slightly swollen, tip light brown. Both terminal 

 joints of the palpi somewhat swollen, and covered with many long black hairs, more 

 numerous underneath. Ungues of the fore and mid tarsi very nearly equal, larger 

 with two teeth, smaller with one basal tooth; ungues of the hind tarsi equal and 

 uniserrate. Genitalia closely resembling those described and figured by Felt (N. Y. 

 State Museum, Bulletin 97), for Culicada conflrmatus, Theo. The spine at the apex 

 of the terminal clasp segment is about one-fifth length of segment. Claspette 

 obsolete, represented by a few weak setae and long hairs, one hair much longer than 

 the others, curved at the tip and swollen towards the base. Harpes slender, curved, 

 base without hairs. Harpagones stout, very deeply infuscated, with a recurved 

 sharp point. Setaceous lobes with a few short, stout setae. Length, 3.5 mm. 



Notes on the adult larva. The fully grown larva attained a length of nearly 

 14 inch. Head nearly circular, deeply infuscated; antennae uniformly chitinized, 

 short, stout, subconical, gradually tapering to the apex, straight along the inner 

 surface, outer surface with a constriction at the lower third, giving the antennal 

 shaft a semi-bulbous outline at the base. Apex with four short, stout spines. Tuft 

 below the middle of about six short hairs not reaching to the apex. Lower surface 

 of antenna with a few large isolated chitinous spines, upper surface with several 

 longitudinal lines of small closely-placed spines; these lines extend through nearly 

 the whole length of the antennal shaft; near the base they divide and ramify. The 

 spines vary much in size, and are for the most part directed inwards. Mentum 

 broadly triangular, with about 40 rather small teeth. Upper and lower epistomal 

 hairs single, short; anteantennal hair tuft with about ten divisions. Thorax densely 

 spinous, with short, stout, thorn-like spines; abdominal spines less dense, arranged 

 in ill-defined transverse rows. Lateral hairs paired on the first segment, single on 

 all the other segments. Scales of lateral comb about 15 in a group. Each scale 

 bordered with fine setae, one or two rather longer terminal spines, the longest of 

 these about half as long as the body of the scale. Air tube about twice as long as 

 broad, a little inflated above the base, deeply infuscated except just at the apex; 

 pecten reaching to the middle, a pair of rather weak hair tufts on a level with the 

 highest pair of pecten teeth; teeth about 15 in number, deeply chitinized, each 

 tooth with several minor teeth on the inner side, one of the latter greatly exceeding 

 the others in size. Anal plate completely encircling the segment, about two-thirds 

 as long as broad; ventral hair tufts about ten pairs springing from a separate 

 barred area; dorsal group of two pairs, upper pair short, compound; lower simple, 

 four times as long as the former. Anal gills equal, lanceolate, narrowing to a fine 

 point, about half as long again as the ventral hair group. 



Descriptiox of Female, Male, and Larva of Aedes tortilis: 



Female. Proboscis moderate, subeylindrical, labellae conically tapered; ves- 

 titure bronzy black; setfe minute, curved, black, those on labellae more promi- 

 nently outstanding. Palpi short, about one-fifth as long as the proboscis, clothed 

 with black scales and moderate, stiff black bristles. Antennae filiform, the joints 

 subequal, rugose, pilose, black, second joint slightly thickened, fusiform, yellow, 

 dark at apex; tori subspherical, with a cup-shaped apical excavation, luteous, 

 blackish and with a patch of fine black hairs on inner side; hairs of whorls 

 moderate, sparse, black. Clypeus rounded triangular, somewhat depressed. 



