REPORT ON MOSQUITOES. 153 



2. The wings are unspotted. 



X. A large blackish species with a narrow white 

 band near the tip of the femur; the tibia 



white spotted jauiaiccnsis 



XI. A large brown species with a lighter band near 

 the tip of the posterior tibia — the latter not 



spotted, pcrtiirbans 



x2. A smaller, blackish species, without markings 



on femur or tibia, tccniorhynclius 



II. The beak is without band or ring; uniform in color. 



a. The joints of the feet or tarsi are banded or ringed at 



base only. 



1. A very large species, with very scaly wings ; the 



sides of the thorax and the bands of abdomen 



and feet white, sqitamiger 



2. A small dark species, with lightly scaled wings ; 



the white bands of the feet narrow ; those of 



the abdomen nearly divided in the center, syk'cstris 



3. A small brown species with the hind tarsi wholly 



white, iiiz'cit arsis 



4. A good-sized brown species, with the bandings yel- 



lowish rather than white, those on the abdom- * 



inal segments only a little or not at all notched 



at the middle; breeds on the salt marshes only, canfator 



5. Very like the preceding; but the bands of the feet 



and abdomen are broader and somewhat lighter 



in color; breeds only in fresh water areas cunlans 



6. Very like the two preceding; but the thorax has a 



central brown stripe, siphoiialis 



b. The joints of the hind feet at least are white-banded or 



ringed at both base and tip; while the last joint 

 of the hind tarsi is entirely white. 



1. A good-sized brown species, the thorax without 



lines or marks, bands of the tarsal joints broad canadensis 



2. A small blackish species, with the top of thorax 



covered with gray hair and a dark line down 

 its center ; the bands on the tarsi are narrow 

 and white alrupalpiis 



3. A small, blackish form, the thorax with fine, bluish 



longitudinal lines ; only the hind feet are 



white-banded and the wings are mottled, signifer 



Series B, in which the feet are uniform in color, not in any way 



marked or banded. 

 I. The thorax is marked in some way, with stripes or spots, 

 or the sides are white or golden brown. 

 a. Species with longitudinal white stripes. 



1. There are two white longitudinal stripes ; the 



species is of moderate size and blackish, triz'illatns 



2. There is a well-defined broad central white band, 



and the top of the head is also white ; else as 



before, scrratus 



3. There is a diffuse white central stripe, not defined 



as before ; a very small blackish species, dnprcei 



h. Species in which the thorax is yellowish, white or brown, 

 leaving a blackish central stripe, usually not 

 sharply defined ; all of moderate size. 



1. The thorax is yellowish; the abdomen white- 



banded pre tans 



2. The thorax is brown, with pale yellowish scales ; 



abdomen white-banded, inconspicuus 



