586 MOSQUITOES OF NORTH AMERICA 



Wings rather broad; membrane hyaline, iridescent; stem of second marginal 

 cell about three-fifths the length of its cell, that of second posterior cell much 

 shorter than its cell ; basal cross-vein distant its own length from anterior cross- 

 vein; veins brownish; vestiture of rather broad tnmcate-tipped scales, black 

 and white intermixed, the black predominating, the outstanding scales long, 

 ligulate to narrowly lanceolate, blackish; a rather long patch of small, dense 

 black scales at base of third vein; fringe dark, with pale shadings towards 

 apex. Halteres entirely pale. 



Legs rather long and slender, with coarse long setae ; femora black and white 

 scaled, the black scales predominating, a narrow white ring at tip of trochanters 

 and at outer fourth,, apices white ; tibiae black scaled, with about twelve little 

 patches of white scales evenly spaced; tarsi black, with moderate white rings 

 at bases of Joints, basal joints of all the tarsi with a broad median white ring ; 

 last joint of front and mid tarsi entirely black. Claw formula, 0.0-0.0-0.0. 



Length : Body about 5 mm. ; wing 4 mm. 



Life history and habits unknown. 



Texas. 



Brownsville, May 21, June 5, 1904 (H. S. Barber). 



We possess only the original type specimens from Brownsville, Texas. 

 Further observations are needed to determine the validity of the species. 



PSOROPHORA FLORIDENSE (Dyar & Knab). 



Janthinosoma floridense Dyar & Knab, Proc. Biol. Soc. Wash., xix, 135, 1906. 

 JantMnosoma floridense Theobald, Mon. Culic, v, 603, 1910. 



OSIOINAI, DeSCEIPTION OF JANTHINOSOMA FLOEIDENSE: 



As in /. texanum Dyar & Knab, but the thorax violet blue. The pale abdominal 

 bands are powdery, interrupted dorsally and confused; the general color. Including 

 the wings, is darli, and the third vein has scale tufts ijiroughout its length. Instead 

 of at base only. 



105 specimens, Tampa, Kissimmee, Sanford, Arcadia, Bartow, Fokatee, Alligator 

 Creek, Florida (Dyar & Caudell). 



Type.— Cat. No. 9972, U. S. Nat. Mas. 



Desceiption of Female, Male, and Labva of Psobophoba flobidense: 



Female. — Proboscis rather short and stout, cylindrical, uniform ; labellae coni- 

 cally tapered ; vestiture of black scales with a broad yellowish-white median ring 

 with diffused edges and a few black scales intermixed; setae minute, curved, 

 black, those on labellae more prominently outstanding. Palpi short and stout, 

 about one-fourth as long as proboscis, densely clothed with black scales, the tip 

 pure white ; setae rather long and black. Antennae moderate ; joints subequal, 

 black, rugose, with a silky luster which makes them appear part white in certain 

 lights ; proximal joints shorter than distal ones ; tori subspherical, luteous, with 

 a patch of white scales; hairs of whorls rather short, sparse, black. Clypeus 

 elliptical, blackish, nude. Eyes black. Occiput short, black, with very narrow, 

 curved bluish-white scales and many slender, erect, forked black ones ; the scales 

 about half cover the surface but are denser in a small patch in middle of each 

 side, below which at eye-margin is a quadrate patch of broad blackish scales 

 followed by broad white scales ; also dense but narrow white scales on vertex. 



Prothoracic lobes moderate, elliptical, remote dorsally, black, with narrow, 

 curved white scales with a violaceous blue luster and many rather long black 

 bristles. Mesonotum deep brown; vestiture of very narrow, curved, deep 

 reddish-brown scales, variegated with pale violaceous blue ones, the pale-blue 

 scales scattered along anterior margin and in a curved stripe along sides of disk 

 connected to a rounded spot behind the sublateral bare depressions; a number 

 of these scales scattered over the general surface and a large patch before ante- 

 scutellar bare space and on either side of it ; bristles numerous, longest at roots 



