TJRANOT-aENIA BASALIS 917 



row of hairs. Maxilla slightly more than hemispherical, divided by a narrow 

 suture ; inner half hairy toward margin, with a row of long thick spines towards 

 tip; a tuft of coarse serrate hairs at tip; outer half with two filaments near 

 middle and a tuft of fine hairs ; palpus short and thick, with four long apical 

 digits and two short subapical ones. Thorax rounded, wider than long ; hairs 

 abundant, the short subdorsal tufts of the mesothorax and metathorax short 

 and stellate. Abdomen moderate, anterior segments shorter; lateral tufts of 

 first two segments long, multiple, evanescent on other segments; secondary 

 hairs more or less in tufts. Air-tube slender, uniform, about five times as long 

 as wide, pecten of short evenly spaced teeth, a multiple tuft before the middle 

 beyond pecten; single tooth a flat scale with long serrations at side. Lateral 

 comb of eighth segment a row of thorn-shaped scales with fine obscure spinules 

 on the sides toward the base; lateral plates absent (specimens immature) . Anal 

 segment about as long as wide, ringed by the plate, which has a row of spines 

 along posterior edge ; dorsal tufts of three hairs on each side ; a small lateral 

 tuft; ventral brush moderately well developed, confined to barred area; anal 

 gills about as long as anal segment, tapered. 



The larvffi from which this species was described were collected from a reedy 

 ditch along the railroad tracks near Santa Lucrecia on the Isthmus of 

 Tehuantepec. These larvae died. 



Southern Mexico. 



Santa Lucrecia, June 30, 1905 (F. Knab). 



UKANOT^NIA BASALIS, new species. 

 Desceiption of Male and Labva of IJEANOTaiNiA BASALIS (Female Unknown) : 



Male. — Proboscis long, moderately slender, distinctly swollen apicaUy, 

 clothed with coarse black scales, labellae rather large and broad with outstand- 

 ing setae. Palpi short and slender, nearly as long again as the clypeus, clothed 

 with blackish scales and with a few setae. Clypeus conical, rounded, constricted 

 at base, dark brown, shining, nude. Antennae plumose, the last two joints long 

 and slender, rugose, pilose, black, the others shorter, progressively longer towards 

 apex, the proximal one about four times as long as wide, each joint with a basal 

 whorl of abundant long brown hairs and a median whorl of short ones ; tori large, 

 subspherical, with a cup-shaped apical excavation, brown. Occiput clothed 

 with broad appressed scales, those on the vertex brownish-black with iridescent 

 luster, margin of eyes broadly white scaled, cheeks also white scaled ; setae along 

 margins of eyes moderate, black. 



Prothoracic lobes large and prominent, well separated dorsally, brown, with 

 a broad oblique line of erect, broad silvery-white scales. Mesonotum dark 

 brown, sparsely clothed with rather coarse, narrow curved, bronzy-brown scales, 

 a pair of submedian longitudinal bare stripes not differentiated from rest of 

 integument; a marginal line of very broad silvery-white scales from before root 

 of wing to near middle of sides ; bristles long, coarse, black. Scutellum dark 

 brovm, the median lobe prominent, clothed with small dark bronzy-brown scales, 

 each lobe with a group of coarse black bristles. Postnotum elliptical, promi- 

 nent, nude, dark brown, slightly pruinose. Pleurae brown, a line of broa,d 

 silvery-white scales crossing obliquely in continuation with that on prothoracic 

 lobes ; coxae pale luteous, with a few whitish scales. 



Abdomen subcylindrical ; dorsal vestiture of dull black scales, a series of seg- 

 mental broad basal creamy-white spots tending to form bands, no lateral spots ; 

 first segment broadly yellowish-white scaled in the middle, dark scaled at the 

 sides, with many fine brownish hairs; venter with pale basal segmental bands; 

 lateral ciliation of sparse coarse pale hairs. 



