408 
CHARLES T. BRUES 
may readily be known however, by the much longer costal vein which 
reaches well beyond the middle of the wing, the black halteres, pale 
antennæ and palpi and more strongly regularly arcuate fourth wing 
vein. It shows considerable affinity with A. planifrons Brues another 
species from New Guinea, but may be distinguished by the dark wings, 
median frontal groove and much longer first longitudinal vein in the 
wings. 
Aphiochæta manca n. sp. 
(Plate VIII. fig. 5.) 
Male. Length 1*25 mm. Slender, yellow, with pale testaceous legs, 
the hind femora strongly blackened at the tip. Abdomen with the third 
and fourth segments black. Knob of halteres piceous. Front yellow, a 
very little higher than wide, with a distinct black ocellar tubercle and 
distinct median impressed frontal line. Four well-developed proclinate 
bristles, the anterior pair much the smaller ; lower angles of front with 
two closely approximated reclinate bristles, following row nearly straight, 
ocellar row normal. Cheeks each with one stout downwardly directed 
macrochæta. Palpi slender, moderately bristly. Antennæ rounded, the 
arista short stout and strongly pubescent. Dorsum of thorax elongate, 
with a single pair of dorsocentral macrochætæ and only two scutellar 
bristles. Abdomen bare, with a few fine bristles along the sides; none 
of the segments elongated. Legs long and slender; the spur of the 
middle tibia three-fourths the length of the first joint of the tarsus. 
Hind femora moderately thickened, not ciliated ; hind tibiæ setulose, 
the length of the bristles over one-half the thickness of the tibia ; one 
long and one short apical spur. Wings hyaline, with a distinct yello¬ 
wish cast, the veins yellowish. Costal vein extending barely beyond the 
middle of the wing, its cilia very short and quite thickly placed; third 
vein close to the costa, not furcate at the tip although there is a 
slight thickening or darkening in the wing at the point where the 
second vein usually extends. First vein meeting the costa at a point 
distinctly nearer to the humeral cross-vein than to the tip of the third. 
Fourth vein very slightly curved ; following nearly straight, the seventh 
distinct. Knob of halteres piceoüs, the base of the stalk yellowish. 
One male from Singapore, January 26, 1902 (Biró). 
This is a most peculiar species which differs from all the other 
known species of Aphiochaeta by the absence of the second vein in 
the wings. The third vein is not furcate at the tip, or at least so in¬ 
distinctly so that there is scarcely any thickening of the wing mem¬ 
brane at this point. On this account it might perhaps be referred to 
