208 MOSQUITOES or NORTH AMERICA 



with brownish luster, the metanotum Is pitchy brown, nearly black; the abdomen is 

 black-scaled above and beneath; in the male with blue and green iridescence. The 

 legs are black. 



Nine specimens, Colon, Canal Zone, Panama (August Busck, collector), from larvae 

 in crab-holes near the ocean. 



Type. — No. 10865, U. S. National Museum. 

 Descbiption of Pemam;, Male, and Labva op Deikocebites MixAN0PHn.TJM: 



Female. — Proboscis rather long, slightly thickened towards apex; labeUae 

 rather large, conical ; setae rather long, dense, those on labellae more prominently 

 outstanding; vestiture of bronzy-black scales. Palpi short, about one-sixth as 

 long as proboscis, bronzy black scaled, with minute outstanding setse. Antennae 

 long, filiform, very slender, coarsely ciliate, second joint about fourteen times 

 as long as wide, succeeding ones about six times as long as wide, subequal ; tori 

 subspherical, with a cup-shaped apical excavation, brown, darker within; hairs 

 of whorls sparse, short, black. Clypeus elliptical, prominent, conical, brown, 

 nude. Eyes broadly contiguous above, black. Occiput clothed with narrow, 

 curved bronzy-brown scales, denser and paler on margin of eyes, numerous 

 erect, forked brown ones forming a dense mass posteriorly; a row of bristles 

 along margins of eyes. 



Prothoraeic lobes elliptical, remote dorsally, clothed with black bristles. 

 Mesonotum clothed with narrow, curved, dark bronzy-brown scales; a pair of 

 bare subdorsal stripes, rather narrow and close together; setae abundant, long, 

 coarse, arranged in broad subdorsal and marginal rows, longest posteriorly. 

 Scutellum trilobate, clothed with bronzy-brown scales, each lobe with a group of 

 coarse black setae. Postnotum rather narrow, convex, dark brown, smooth. 

 Pleurae and coxae luteous brown, with a vertical patch of bronzy-brown scales on 

 mesopleurae and rows of rather coarse dark bristles. 



Abdomen subcyUndrieal, truncate at apex, cerci large, subcorneal, each with a 

 pair of flattened terminal filaments, the last segment of abdomen tubercularly 

 roughened at tip on the lower surface with long coarse setae; vestiture above of 

 black scales with dark bronzy and blue luster, Jbeneath dark brown, submetallic 

 bronzy; setae numerous, those on hind margins of the segments coarser; first 

 abdominal segment with numerous black hairs on the dorsum. 



Wings moderate, hyaline; petiole of second marginal cell about one-third as 

 long as its cell, that of second posterior cell shorter than its cell; basal cross- 

 vein distant rather more than its own length from anterior cross- vein; scales of 

 veins narrowly ovate to ligulate, a few with subtruncate apices, densest and 

 broadest on forks of second vein ; bronzy brown with blue reflection along the 

 costa. Halteres pale with black knobs. 



Legs long and slender, middle femora slightly stouter than others ; vestiture 

 black with bronzy and blue reflection; femora slightly paler beneath. Claw 

 formula, 0.0-0.0-0.0. 



Length : Body about 4 mm. ; wing 3.5 mm. 



Male. — Proboscis moderately long and slender, with a suture beyond the 

 middle. Antennae very long, exceeding the body in length; second joint about 

 fourteen times as long as wide, third joint about eight times as long as wide, 

 succeeding ones progressively shorter, penultimate one about four times as long 

 as wide, last joint slender and about equal to penultimate; hairs of whorls 

 sparse, moderate, shorter than in the female, obscured by the coarse ciliation. 

 Palpi very short, about one-sixth as long as proboscis. Coloration as in the 

 female. Wings much as in the female, the stems of the fork-cells slightiy 

 longer. Abdomen subcylindrical, somewhat enlarged apically, the ciliation 

 coarse, especially towards apex. Claw formula, 1.0-1.0-0.0. 



Length : Body about 4.5 mm. ; wing 3.5 mm. 



