PSOROPHOEA FLOEIDENSE 587 



of wings, brown, with black tips. Scutellum trilobate, black, densely clothed 

 with silvery violaceous scales, each lobe with a group of about ten black bristles. 

 Postnotum elliptical, prominent, dark brown, nude. Pleurae and coxae brown, 

 clothed with rather narrow, elliptical white scales, the setae short, blackish. 



Abdomen subcylindrical, flattened, the posterior segments taperiug; dorsum 

 clothed with broad, flat black scales and yellowish-white ones, the white ones 

 forming a broad apical band on second segment, on the following segments the 

 apical band is divided medianly, on the fifth segment forming large, irregular, 

 sublateral posterior spots, on the sixth and seventh segments the spots are again 

 divided transversely, forming a pair of median and apical lateral spots ; venter 

 with black and light colored scales nearly evenly intermixed, some of the scales 

 white and others ocherous, not forming a defined pattern, the black scales tend- 

 ing to form subapical bands, particularly on the distal segments; setae rather 

 numerous, short, mostly dark. 



Wings rather broad, membrane smoky-hyaline; petiole of second marginal 

 cell rather less than half as long as its cell, that of second posterior cell a little 

 longer; basal cross-vein more than its own length distant from anterior cross- 

 vein ; veins brownish ; vestiture of black scales with a few white ones irregularly 

 intermixed, appressed scales of veins broad, with rounded-triangular tips, a 

 short cluster of these at base of third vein and similar scales distributed along 

 most of the length of this vein; outstanding scales on apical half of wing 

 broadly linear, long, brown, those on fork of second vein broader and denser; 

 fringe blackish. Halteres whitish, the knobs darker. 



Legs rather long and slender, with long black setae, especially on the femora ; 

 femora mostly whitish scaled below, black scales above with white ones inter- 

 mixed, the extreme base and apex and a narrow subapical ring white ; tibiae black 

 scaled, with numerous little patches of white scales, about ten in the length of 

 the tibia ; tarsi black scaled, each joint with a rather narrow white basal ring, 

 the first joint with a narrow median white ring in addition ; on the fore legs the 

 last two joints and on the middle legs the last joint entirely black. Claw 

 formula, 0.0-0.0-0.0. 



Length: Body about 5.5 mm.; wing 4.5 mm. 



Male. — Proboscis straight, rather long and slender, a narrow pale ring be- 

 yond the middle. Palpi exceeding the proboscis by the length of the last two 

 joints, which are long, slightly thickened and upturned ; vestiture black, small 

 patches of white scales at bases of joints, a whitish bare ring at false articulation 

 before middle of long joint; tip of long joint and last two joints with long, 

 dense, dark brown hairs. Antennae plumose, the last two joints long and pilose, 

 the rest short, whitish, blackish at origins of hair-whorls; hairs long, dense, 

 brown, appearing luteous in certain lights by reflection. Coloration similar to 

 the female. Abdomen long, depressed, with long and dense, brown lateral 

 ciliation. Wings narrower than in the female, less smoky, the stems of the fork- 

 cells much longer, that of the second marginal cell being as long as its cell ; 

 vestiture much less developed ; fringe pale gray. Claw formula, 2.1-2.1-0.0. 



Length : Body about 5 mm. ; wing 3.7 mm. 



Genitalia (plate 22, fig. 153) : Side-pieces about twice as long as wide, with 

 a rounded tip, apical lobe well developed, prominent, rounded; no basal lobe. 

 Clasp-filament stout, greatly swollen in center on inner side and a stout terminal 

 articulated spine. Harpes flat, concave, inner margins thickened and revolute, 

 curved over at tip, widely cleft to form a short tooth projecting laterally. Har- 

 pagones with a narrow ligulate base and triangular expanded apex bearing six 

 stout setffi, of which the four inner ones are feathered. Unci approximate, form- 

 ing a short stout comb with truncate tip, the margins broadly revolute, touching 

 centrally. 



