Singapore.
Gen. Rioxa, n. g. (Plate II. fig. 3.)
Fœm. Corpus angustum, pubescens. Caput sat parvum, thorace multò angustius. Antennarum articulus 3us sublinearis; arista rarò plumosa. Thorax longiovatus. Abdomen fusiforme, thorace multò angustius, vix longius. Pedes graciles, antici breves. Alæ longæ, mediocriter latæ, obscuræ, guttis albis.
Female. Body narrow, dull, pubescent. Head rather small, much less broad than the thorax; epistoma not prominent. Proboscis and palpi short. Antennæ not reaching the epistoma; 3rd joint almost linear, moderately long; arista thinly plumose. Thorax elongate-oval. Abdomen fusiform, much narrower, but hardly longer than the thorax. Legs slender; fore legs short. Wings long, moderately broad, dark with white dots; radial vein ending at rather in front of the tip of the wing; discal transverse vein almost straight, very oblique, parted by about one-fourth of its length from the border, and by somewhat less than its length from the præbrachial transverse.
114. Rioxa lanceolata, n. s., fœm. Cervina, thorace nigro-quadrivittato, abdomine nigro vittâ dorsali cervinâ, pedibus testaceis, alis nigricantibus strigâ discali guttisque quinque albis.
Female. Fawn-colour. Proboscis, legs and halteres testaceous. Thorax with two blackish stripes on each side, the outer pair shortened hindward. Abdomen black, with a fawn-coloured dorsal stripe which is attenuated hindward, and does not extend to the tip. Wings blackish, almost limpid along the hind border for more than half the length from the base, with a white discal streak and with five white dots; 1st dot in a line with the streak; 2nd very minute, behind the 1st; 3rd on the costa near the tip; 4th larger, apical, near the 5th, which is on the hind border. Length of the body 5 lines; of the wings 10 lines.
Singapore.
Gen. Xiria, n. g. (Plate II. fig. 2.)
Mas. Corpus metallicolor, subsetosum. Caput latiusculum. Palpi longiusculi. Antennæ breves; articulus 3us sublinearis; arista latè pumosa. Thorax robustus. Abdomen lineare, thorace paullò longius et multò angustius. Pedes longiusculi, sat validi. Alæ mediocriter longæ latæque.
Male. Body metallic, slightly setose. Head rather broad, hardly narrower than the thorax; epistoma not prominent. Proboscis short. Palpi porrect, rather long and stout. Antennæ short, not nearly reaching the epistoma; 3rd joint almost linear; arista deeply plumose, much more than twice the length of the 3rd joint. Thorax stout. Abdomen linear, a little longer than the thorax and about half its breadth. Legs rather long and stout. Wings moderately long and broad; subcostal vein ending at rather beyond one-third of the length; mediastinal ending at very much beyond half the length; radial ending at beyond five-sixths of the length; cubital ending at hardly in front of the tip; discal transverse nearly straight, slightly oblique, parted by about half its length from the border, and by rather more than its length from the præbrachial transverse.