COLLECTED AT SINGAPORE AND MALACCA. 
35 
Abdomen subfusiformo, apice attenuatum, thorace paulld longius. Pedes 
gracilea. Alee longiuscul®, sat angust®, venis limbatis. 
Female. Body rather narrow, dull, pubeBcent. Head a little less broad than 
the thorax ; epistoma not prominent. Proboscis and palpi short. An- 
tennae not. reaching the epistoma ; 3rd joint rather long, sublanceolate ; 
arista plumose. Abdomen sub fusiform, somewhat attenuated at the tip, a 
little longer than the thorax. Legs slender. Wings rather long and narrow ; 
subcostal vein ending at before one-third of the length of the wing ; media- 
stinal ending at much beyond half the length ; radial ending at about seven- 
eighths of the length ; cubital ending at very little in front of the tip ; discal 
transverse vein straight, hardly oblique, parted by one-fourth of its length 
from the border, and by very much more than its length from the prso- 
brachial transverse. 
This genus seems to be somewhat allied to the Helomyzides. 
113. SornntA yentsta, n. s., feem. Testacea, thoracis fascia metathorace ab- 
dominisque fasciis tribus maculisque duabus subapicalibus nigris, tibiis fus- 
cescentibus, alis limpidis venis fuseo-limbatiB. 
Female. Testaceous. Thorax with a black band between the wings. Metathorax 
black. Abdomen with three black bands, and with a black subapical spot on each 
side. Tibia? brownish ; tarsi tawny. Wings limpid, lurid in front, striped with 
brown along most of the veins ; veins black, tawny towards the base ; cubital 
vein minutely setoso towards the base. Length of tho body 4 lines ; of the 
wings 8 lines. 
Singapore. 
Gen. Rioxa, n. g. {Plate II. fig. 3.) 
Feem. Corpus angustum, pubeacens. Caput sat parvum, thorace multd angustius. 
Antennarum articulus 3 U * sublinearis ; arista rard plumosa. Thorax longi- 
ovatus. Abdomen fusiforme, thorace multb angustius, vix longius. Pedes 
graciles, antiei breves. Alee long®, mediocriter lat®, obscur®, guttis albis. 
Female. Body narrow, dull, pubescent. Head rather small, much less broad 
than the thorax j epistoma not prominent. Proboscis and palpi short. An- 
tenn® not reaching the epistoma ; 3rd joint almost linear, moderately long ; 
arista thinly plumose. Thorax elongate-oval. Abdomen fusiform, much nar- 
rower, but hardly longer than the thorax. Legs slender j fore legs short. Wings 
long, moderately broad, dark with white dots ; radial vein ending at rather in 
front of the tip of the w r ing ; 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 pr®brachial transverse. 
114. Rioxa lanceolata, n. s., foem. Cervina, thorace nigro-quadrivittato, ab- 
domine nigro vitta dorsali cervina, peclibus testaceis, alis nigricantibus striga 
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, 
3 * 
