876 MOSQUITOES OF NORTH AMERICA 



ferente no genero e na especie. Desconhego o macho, mas os caracteres da femea 

 indicam que deve ser collocado ao lado do stegoconops leucomelas. 



Description of Female, Male, and Labva of H^magogus capbicornii: 



Female. Proboscis rather long and slender, subcylindrical, uniform labellse 

 conically tapered ; vestiture deep blue-black ; setfe minute, curved, black, those 

 on labellae more prominently outstanding. Palpi small, about one-sixth as long 

 as the proboscis ; vestiture metallic violet-black, veith a few moderate setae. An- 

 tennae filiform, the joints subequal, rugose, pilose, black ; second joint distinctly 

 swollen at middle; tori rather small, subspherical, with a cup-shaped apical 

 excavation, black, with a few minute hairs on inner side ; hairs of whorls sparse, 

 rather long, black. Clypeus prominent, rounded triangular, flattened, black, 

 nude. Eyes black. Occiput clothed with broad, flat, dark violet-blue scales 

 with a metallic reflection ; cheeks and margins of eyes appearing silvery ; setae 

 along margins of eyes coarse, black, those projecting between the eyes also black. 



Prothoracic lobes elliptical, large, collar-like, closely approximate dorsally, 

 clothed with broad, flat, dark metallic blue scales and a few stiff black bristles. 

 Mesonotum black, clothed with elliptical, flat, dark scales with bright green, 

 blue and bronzy metallic reflections; bristles over roots of wings black. Scu- 

 tellum trilobate, middle lobe broad, clothed with broad metallic blue scales, each 

 lobe with a group of dark bristles. Postnotum elliptical, prominent, brownish- 

 black, shining, nude. Pleurae and coxse blackish, nearly solidly clothed with 

 silvery-white fiat scales; setas minute, dark. 



Abdomen subcylindrical, slightly tapered posteriorly, the sixth and seventh 

 segments apically expanded beneath; dorsal vestiture of bright metallic violet 

 and purple scales, a lateral series of large, subquadrate, segmentary basal 

 silvery-white spots, showing in dorsal view on sixth, seventh and eighth seg- 

 ments, continued dorsally as narrow basal bands on the last two ; first segment 

 metallic violet scaled with a silvery spot at the sides and with many short, fine 

 dark hairs ; venter violaceous scaled, with narrow segmental basal silvery bands, 

 the scales on sixth and seventh segments roughened. 



Wings rather narrow, hyaline ; petiole of second marginal cell longer than its 

 cell, that of second posterior cell longer than its cell; basal cross-vein distant 

 about its own length from anterior cross-vein ; scales brownish-black, a blue 

 refiection on the costa, outstanding ones narrowly ligulate. Halteres whitish, 

 with black knobs. 



Legs rather long, moderately slender; vestiture dark metallic violet; tro- 

 chanters silvery-whitish; mid femora with scattered white scales below; hind 

 femora broadly silvery-white below nearly to tip; scales somewhat roughened, 

 particularly on hind tibiae and tarsi. Claw formula, 1.1-1.1-0.0. 



Length : Body about 4 mm. ; wing 3 mm. 



Male. Proboscis rather long and slender, somewhat upcurved, black. Palpi 

 short, about one-eighth the length of the proboscis, violet-black scaled. Antennae 

 plumose, the last two joints long and slender, rugose, pilose, black, the others 

 short, pale, ringed with black at insertions of hair- whorls ; hairs of whorls long, 

 fine and dense. Wings narrower than in the female, the stems of the fork-cells 

 longer; vestiture sparse. Coloration similar to the female. Abdomen hardly 

 more elongate than in the female ; seventh and eighth segments much dilated, 

 apically with coarse, long, sub-erect black scales ; no distinct lateral ciliation. 

 Claw formula, 1.1-1.1-0.0. 



Length : Body about 4 mm. ; wing 3 mm. 



Genitalia (plate 24, fig. 165) : Side-pieces twice as long as wide, conically 

 tapered ; basal lobe a small rounded protuberance at the base, densely setose ; a 

 row of large outstanding scales on inner aspect. Clasp-filament moderate, with a 

 long, articulated terminal spine. Harpes slender, subspatulate, inner margin 

 thickened, tips recurved in a minute hook, minutely dentate on margin. Har- 



