Qo6 MOSQUITOES OF XOETH AMEEICA 



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

 Halteres -with light stem and dark knob. 



Length. S-S.5 mm. 



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



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



0BIGI>-AL DESCBIPTIOX of GRABHAiTLY GRISE.^.: 



(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, prothoracic 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 

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



Length. 5-6 mm. 



Habitat, Boise Barracks, Idaho. Taken July. 



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

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

 hind metatarsi, nor a white band on the proboscis, 



Descbiptiox of FziiAix AJJTD Male of Aedes :?r[GB0MAcuxis f Labva Uxkxowx) : 



Female. Proboscis moderate, cylindrical, uniform, labellse conicallv tapered; 

 vestitnre black, with a narrow white ring at middle : tips of the labellae whitish, 

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

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

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

 proximal joints dull yellowish ; tori subspherical, -with a cup-shaped apical ex- 

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

 sparse, very short, black. Ch-peus 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 



