576 MOSQUITOES OF NOETH AMEEICA 



terval between them; lateral scales of the veins varying from broadly oblanceolate 

 to very narrow, almost linear; petiole of the first submarginal cell slightly longer 

 than the cell; hind cross-vein nearly its own length before the small. Length 3 mm. 



j papli slender, brown, bases of last two joints and the preceding joint except 



its apex yellow; proboscis reaching slightly beyond base of penultimate joint of 

 palpi; hairs of antennae golden yellow, many on the lower side brown. Scales of 

 abdomen mixed brown and whitish. Front and middle tarsi bearing two teeth under 

 one of the claws and one under the other, hind tarsal claws not toothed. Length 4 

 mm. Otherwise as in the female. 



Monterey, Mexico. One female and four males (the latter much abraded), bred 

 by Dr. Joseph Goldberger. 



Type. No. 8029, U. S. National Museum. 



Desckiption of Female, Majle, and Larva of Psorophora signipennis: 



Female. Proboscis cylindrical, rather stout, uniform, labellae tapering, 

 brown; vestiture at both ends dark brown, soiled white in the middle, mixed 

 with a few brown scales; seta3 minute, curved, dark, those on labellse more 

 prominently outstanding. Palpi about one-fourth as long as proboscis, thick ; 

 vestiture of dark-brown and Avhite scales intermixed, a few moderate black 

 bristles. Antennae rather short and thick; joints broad and somewhat com- 

 pressed, subequal, blackish, pale at the articulations, minutely pilose; hairs of 

 whorls very short, sparse, black; second segment paler and longer than the 

 others; tori subspherical, with a cup-shaped apical excavation, sordid whitish, 

 subpruinose. Clypeus short, broadly rounded at tip, slightly prominent, luteous 

 with a black shade at base and sides, nude and shining. Eyes black. Occiput 

 narrow, convex, brown, rather sparsely clothed with narrow, curved pale-golden 

 scales, a few flat white elliptical ones along eye-margin, many narrow, erect, 

 forked pale scales on the nape ; sides clothed with broad, flat white scales, inclos- 

 ing a dark patch at ocular margin ; bristles along margins of eyes rather short 

 and mostly pale. 



Prothoracic lobes long and narrow, remote dorsally, brown, with narrow, 

 curved golden scales and black bristles. Mesonotum brown, with three darker 

 impressed lines ; vestiture golden brown medianly, pale toward margins, of 

 small, narrow curved scales uniformly distributed, except over ante-scutellar 

 space, which is narrowly bare; bristles short, dark brown, those over roots of 

 wings dense, pale yellowish. Scutellum trilobate, the mid lobe large, brown, 

 clothed with yellowish-white scales and with a group of about ten brown bristles 

 on each lobe. Postnotum elliptical, pale brown, nude. Pleurae and coxa? pale 

 brown, with narrow elliptical white scales and pale setae. 



Abdomen subcylindrical, flattened, strongly tapering towards apex ; vestiture 

 dorsally of pale- brown and yello^vish-white scales, some blackish ones inter- 

 mixed, some of these fonning irregular central segmentary spots ; the segments 

 show ill-defined broad whitish apical bands, medianly produced; setas in rows at 

 extremities of segments, dark ; ventral vestiture of pale scales with a few inter- 

 mixed dark ones. 



Wings moderate, hyaline ; stem of second marginal cell about as long as its 

 cell, that of second posterior cell very slightly shorter ; basal cross-vein distant 

 a little less than its own length from anterior cross-vein ; veins pale; vestiture of 

 rather broad white and black scales intermixed, along basal half of costa the 

 scales are evenly intermixed, on apical half three elongate black spots separated 

 by longer white-scaled areas; other veins with scales evenly mixed; sixth vein 

 white at its tip, a black patch preceding; outstanding scales on apical part of 

 wing narrowly lanceolate, gray, many of the others broader and subtruncate; 

 fringe alternating black and white. Halteres entirely whitish. 



Legs moderately long, without any outstanding scales, pale yellowish, vesti- 

 ture of brownish-black and yellowish-white scales intermixed, rather evenly so 

 on femora and tibiae ; before tips of femora and in a preceding area the black 



