PSOEOPHOEA LUTZn 559 



Legs unhanded, deep brown with violet reflections; coxae brown, bases of the 

 femora pallid yellowish, last two tarsi of the hind legs white, fore and mid ungues 

 uniserrated. Wings rather short; first sub-marginal cell a little longer and narrower 

 than the second posterior cell, its base nearer the base of the wing than that of the 

 second posterior, its stem about half the length of the cell; stem of the second pos- 

 terior nearly as long as the cell; posterior cross-vein about its own length distant 

 from the mid cross-vein; halteres with pale stem and black knob. 



Length. — 3.8 to 4 mm. 



Time of capture. — December, in Trinidad (Urich). 



Hahitat—Sonth America (Walker); Trinidad, at Aqua Santa (F. W. Urich). 



Observations. — ^The types of c? and $ in the British Museum are in very bad con- 

 dition; the 2 has no legs nor abdomen, and the specimens are much faded. 



The specimens from which this description is drawn up are perfect. There is one 

 small difference seen in the type, namely, that the posterior cross-vein is nearer to 

 the mid than in the Trinidad specimens. The central thoracic scales are also bronzy, 

 whilst in the specimens described here they are deep brown, but this is due to fading 

 in the type. 



Arribalzaga's J. discrucians is larger, being 6 mm. His species has been sent over 

 by Dr. Lutz, and was re-named by Colonel Giles J. Arribalzagae; the type, a ?, is in 

 the Museum. Giles is quite wrong in saying the true discrucians has an unadorned 

 thorax; the type shows it just as described here. 



Obiginai. Dbscbiption of Janthinosoma albipks: 



Janthinosoma discrucians. Theobald (non Walker). 



Mono. Culicid. III., p. 126 (1903), Theobald; Les Moustiques, p. 232 (1905), 

 Blanchard; Class. Mosq. N. and M. Amer. Tech. Se. 11, U. S. Dept. Agri., p. 17 (1906), 

 Coquillett. 



This proves to be a new species and not discrucians, Walker, a mistake having 

 arisen owing to the type (d) not agreeing with Walker's description. 



Additional localities. — Fort Logan, H. Roots, Arkansas (Miss Ludlow). 



Coquillett would sink this as a synonym of J. lutzii, Theobald, but the latter is 

 quite distinct, having a different ornate thorax and the apex of the second hind 

 tarsal also white. 



Descbiption of Female of Psorophoba lutzh (Male and Labva Unknown) : 



Female. — Proboscis rather long, slender, cylindrical, not enlarged at apex, 

 labellae conically tapered, with a few outstanding setae; vestiture deep black with 

 a blue reflection in certain lights. Palpi about one-fifth as long as proboscis, 

 scales black with a blue reflection, a few rather long black bristles. Antennae 

 moderate, the segments subequal, blackish, pilose ; tori subspherical, with a cup- 

 shaped hollow tip, smooth, blackish, a few white scales on inner side; second 

 segment slightly thickened, pale on its basal portion; hairs of whorls sparse, 

 black. Clypeus prominent, elongate, elliptical, nude, shining, blackish. Eyes 

 black. Occiput roundedly prominent, blackish, densely clothed with broad, flat, 

 pale-yellow scales, small, upright, forked, pale yeUow scales intermixed pos- 

 teriorly, a small patch of blue-black ones at middle of each side ; a row of black 

 bristles near margins of eyes, some pale ones projectiag at the vertex. 



Prothoracic lobes rather large, remote, black, a sparse covering of pale-yellow 

 scales throughout and numerous black bristles. Mesonotum with black mem- 

 brane; a broad dorsal area widening posteriorly, clothed with lanceolate deep 

 brown scales and small black bristles ; sides of disk densely clothed with small 

 elliptical, pale ochreous yellow scales, many short golden bristles at roots of 

 wings. Scutellum trilobate, the median lobe prominent, black with elliptical 

 brown scales, each lobe with about eight black bristles. Postnotum roundedly 

 prominent, nude, blackish brown. Pleurae blackish, clothed for the most part 

 with dense, flat creamy white scales ; coxae of fore and mid legs blackish, with 

 a row of black bristles, those of hind legs with a row of pale bristles, each with a 

 patch of flat pale-yellow scales. 



Abdomen subeylindrical, posterior segments rapidly tapering ; dorsal vestiture 

 of blue-black scales, with large, triangular patches of yellowish ones on posterior 

 angles of the segments, smaU on the last; first segment with a central patch of 

 yellowish scales and many pale setae ; venter with vestiture blue-black at bases 



