398 
CHARLES T. BRUES 
of proclinate bristles which are very small and almost obsolete. Antennæ 
pale yellow, small. Palpi moderate, with a small number of strong bristles. 
Dorsum yellow, with a single pair of dorsocentral macrochætæ and four 
marginal scutellar bristles. Abdomen dark brownish, with a transverse 
yellow band at the base of the second segment and another at the tip, 
just before the hypopygium. Side angles of the second segment with a 
few strong bristly hairs. Hypopygium sub-shining, brownish black, some¬ 
what pollinose, and with a few scattered hairs ; lamella pale yellow. 
Yenter pale yellowish. Coxæ and legs slender, yellow, the hind tibiæ 
very finely setulose. Wings of moderate size, tinged with brownish ; 
costal vein long, reaching well beyond the middle of the wing, its cilia 
short and rather thickly placed ; first vein ending midway between the 
humeral cross-vein and the tip of the third ; cell formed by the furcation 
of the third vein very small ; fourth vein very strongly and evenly cur¬ 
ved, ending as far before the apex of the wing as the fifth does behind it ; 
seventh vein very delicate, but distinct tho the margin. Knob of halteres 
brown, the stem yellow. 
Described from a single male from Vilcanota. Type in the collection 
of the Hungarian National Museum. 
This very small species resembles A. aurea Ald., but differs in 
showing on orange color on the abdomen, as well as by its paler, more 
weakly veined wings. The course of the fourth vein is also quite different. 
Aphiochæta bella n. sp. 
Female. Length 2*4 mm. Slender; yellow, except head above and 
apical portion of abdomen which are black. Head yellowish orange, bla¬ 
ckened above on the front and the vertex. Frontal furrow very strong 
and deep. Ocellar tubercle present. Antennæ yellow. Lower two post¬ 
ocular cilia on each side enlarged into macrochætæ. Palpi pale yellow, 
normal in size and chætotaxy. Thoracic dorsum pale brownish, distinctly 
hairy and sub-shining ; somewhat ochraceous pollinose near the humeral 
angles ; with one pair of dorsocentral macrochætæ and four marginal 
scutellar bristles. Abdomen slender ; first three segments brilliant orange, 
the remainder deep black ; each posterior angle of the second segment 
with a small tuft of bristles. Wings long and rather narrow; costal vein 
very long, reaching nearly two-thirds of the way to the wing tip, its 
bristles exceedingly minute, almost obsolete. Wings strongly tinged with 
brown, the veins strong, deep brown ; costal margin for a short distance 
beyond the tip of the third vein strongly infuscated. Venation much as 
in A. aurea Ald., except that the cell formed by the furcation of the 
