DEINOCERITES PSEUDES 211 



at the bases of the joints inconspicuous, as small as in the female. Coloration as in 

 the female. Genitalia approximately as in Z). cancer Theob. Length, 4 mm. 



Nine specimens, bred from larvae in crab-holes, Ancon, Canal Zone, Panama 

 (A. H. Jennings) . 



Type no. 12053, U. S. N. M. 



Description of Female, Male, and Lakva of Deinocebites pseudes : 



Female. — Proboscis rather long, slightly thickened towards apex; labellae 

 rather large, conical ; setae rather long, dense, those on labellae more prominently 

 outstanding; vestiture of brownish-black scales with slight luster. Antennae 

 long, filiform, very slender, second joint about fourteen times as long as wide, 

 the succeeding ones about five times as long as wide, subequal ; tori subspherical, 

 with a cup-shaped apical excavation, luteous brown, darker within; hairs of 

 whorls sparse, short, black; ciliation coarse. Clypeus elliptical, prominent, 

 conical, brown, nude. Eyes broadly contiguous above, black. Occiput clothed 

 with narrow, curved, pale bronzy-brown scales, those on margins of eyes paler 

 and denser; numerous erect, forked pale brown ones forming a dense mass on 

 the nape ; a row of bristles along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, clothed with black bristles. 

 Mesonotum clothed with narrow, curved bronzy-brown scales; a pair of bare 

 subdorsal stripes, rather narrow and close together; setae abundant, long, coarse, 

 arranged in broad subdorsal and marginal rows, longest posteriorly. Scutellum 

 trilobate, clothed with bronzy-brown scales, each lobe with a group of coarse 

 black setae. Postnotum rather narrow, convex, dark brown, smooth. Pleurae 

 and coxae luteous brown, with a vertical patch of bronzy-brown scales on meso- 

 pleurae and rows of rather coarse black bristles. 



Abdomen subcylindrical, blunt at apex; cerci moderate, subconical, without 

 terminal filaments and with many fine hairs ; last segment of abdomen densely 

 pilose on the lower surface posteriorly ; vestiture above of dull blackish scales, 

 with bronzy and blue luster, beneath dull yellowish, submetallic ; setae numerous, 

 those on hind margins of the segments; coarser; first segment with numerous 

 brown hairs dorsally. 



Wings moderate, hyaline ; petiole of second marginal cell about one-third as 

 long as its cell ; that of second posterior cell shorter than its cell ; basal cross- 

 vein distant more than its own length from anterior cross-vein ; scales of veins 

 narrowly ovate to ligulate, a few with subtruncate apices, densest and broadest 

 on forks of second vein, bronzy brown, with blue reflection along the costa. 

 Halteres pale with black knobs. 



Legs long and slender, the middle femora stouter than the others ; vestiture 

 of black scales, with a bronzy or blue reflection in some lights; femora paler 

 beneath. Claw formula, 0.0-0.0-0.0. 



Length : Body about 4.5 mm. ; wing 4 mm. 



Male. — Proboscis moderately long and slender, with a suture well beyond the 

 middle, part beyond suture swollen. Antennae very long, exceeding the body in 

 length; second joint about sixteen times as long as wide, third joint about 

 twelve times as long as wide, succeeding ones progressively shorter, penultimate 

 one about five times as long as wide, last joint slightly thicker and shorter; 

 hairs of whorls sparse, shorter than in the female, with scattered longer setae 

 on the shaft. Palpi very short, about one-sixth as long as proboscis. Coloration 

 as in the female. Wings slightly narrower than in the female, the stems of the 

 fork-cells longer. Abdomen subcylindrical, somewhat enlarged apically, the 

 ciliation coarser than in the female especially apically. Claw formula, 

 0.0-0.0-0.0, 



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



Genitalia (plate 8, fig. 51) : Side-pieces over twice as long as wide, stout, a 

 rounded, conical apical lobe on inner angle bearing fine setae, prominence at 



