656 MOSQUITOES OF NORTH AMERICA 



posterior cross vein about the same length as, and its own length distant from mid. 

 Halteres with light stem and dark knob. 



Length. 8-8.6 mm. 



Habitat. Fort Keogh, Montana, Fort Lincoln, N. D. 



Taken. Fort Keogh, Sept. 1-8., July 12-27. 



Obiqinai, Dbsceiption of Gbabhamia geisea: 



(Female.) Head dark, covered with slender curved scales, light ochraceous on the 

 occiput, a triangular space of darker golden brown, scales just external, and 

 ochraceous flat scales on the sides, no fork scales; antennae brown, verticels brown, 

 pubescence light, basal joint brown, covered with flat ochraceous scales; palpi 

 entirely brown scaled; proboscis brown, a light band, narrow on the dorsal and wider 

 on the ventral aspect, at the apex of the proximal half; clypeus brown; eyes brown 

 and gold. 



Thorax dark brown, prothoraclc lobes with slender curved light brown scales; 

 mesonotum with slender curved scales, a distinct bare (dark) median line, im- 

 mediately laterad of which on either side is a broad stripe of bright brown scales, 

 then a light golden brown or ochraceous stripe extending cephalad from the scu- 

 tellum to nape, external to these on the caudad half are the darker brown scales, and 

 the lateral portion of the dorsum is covered with the lighter brown scales; scutellum 

 dark, with light brown or ochraceous scales, and long light bristles on the margin; 

 pleura ashy-brown, with white scales; metanotum dark brown. 



Abdomen dark, heavily and closely covered by flat ochraceous scales; two tiny 

 dark submedian points not large enough to call spots, and yet very distinct, on all 

 the segments but the first, which has a large bunch of almost white scales and light 

 hairs; ventrally the abdomen is also covered with ochraceous scales, but not so 

 heavily as dorsally. 



Legs: coxae and trochanters mostly light-scaled; femora dorsally sprinkled with 

 dark brown and ochraceous scales, darker toward the apex, but the very apex white; 

 ventrad, caudad and cephalad aspects ochraceous. Tibiae much like femora but 

 darker, and on the hind legs have a distinct dark apical band; metatarsi on fore 

 legs much like tibiae, and all the following joints missing; on mid legs also much 

 like tibiae; tarsal joints dark, the first and second with small ochraceous basal spots; 

 on the hind legs the metatarsi are quite dark but still slightly sprinkled with light 

 scales, and it and all the tarsal joints except the fourth are heavily basally white- 

 banded, the fourth dark; all ungues uniserrate. 



Wings clear, mostly dark-scaled, especially near the costa, the sixth long vein 

 mostly dark, first submarginal a little longer and about half the width of the second 

 posterior cell, the stems in each case about two-thirds the length of the cell; cross- 

 veins nearly equal in length, the posterior about its own length distant from the 

 mid; halteres mostly light, a little darkened on the knobs. 



Length, 5-G mm. 



Habitat, Boise Barracks, Idaho. Taken July. 



This evidently lies near <?. Fletcherii, but the abdominal marking is distinct, and 

 the specimens of Fletcherii which I have seen do not show a marked band on the 

 hind metatarsi, nor a white band on the proboscis. 



Desceiption or Female and Mai.e of Aedes nigbomaculis (Labva Unknown) : 



Female. — Proboscis moderate, cylindrical, unif onn, labellse conically tapered ; 

 vestiture black, with a narrow white ring at middle ; tips of the labellse whitish, 

 their setse minute, somewhat outstanding. Palpi short, stout, about one-fourth 

 as long as the proboscis, deep black, tips slightly whitish. Antennae moderate, 

 distal joints longer than basal ones, rugose, shining blackish, white pilose, the 

 prozimal joints dull yellowish ; tori subspherieal, with a cup-shaped apical ex- 

 cavation, blackish, with many broad, flat whitish scales; hairs of the whorls 

 sparse, very short, black. Clypeus prominent, broadly conical, dull black, 

 slightly pruinose. Eyes black. Occiput black, broadly clothed with coarse, 

 very narrow curved scales on the vertex, flat ones on lower parts of sides ; scales 

 yellowish white, a large brownish patch in middle of side; many yellowish, erect 

 forked scales well back on the nape; bristles rather numerous, brown, those 

 projecting between eyes whitish. 



Prothoracic lobes elliptical, remote, black, with curved yellowish-white scales, 

 brown ones above, and blackish setae. Mesonotum black, clothed with narrow, 

 curved scales, pale brownish golden, a rather broad, deep golden brown median 



