36 MR. walker’s catalogue op dipterous insects 
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 metahicolor, subsetosum. Caput latiuscuhrm. Palpi longiuscnli. 
Antenna breves ; articulus 3 US sublinearis ; arista lat& plumosa. Thorax ro- 
bustus. Abdomen linear©, thorace paulld longius et mult.6 angustius. Pedes 
longiuscnli, sat validi. Alee mediocriter long® latseque. 
Male. Body metallic, slightly setose. Head rather broad, hardly narrower than 
the thorax ; epistoma not prominent. Proboscis short. Palpi porrect, rather 
long and stout. Antenna 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 pree- 
brachial transverse. 
115. Xibia antica, n. s., mas. Purpurea, capite nigro, antennarum articulo 3° 
ferrugineo, pedibus testaceis, tibiis nigris, tarsis albis anticis ferrugineis, alis 
sublimpidis apice nigricantibus maculis eostalibus albis et nigricantibus. 
Male. Purple. Head and appendages black. Third joint of the antennse ferru- 
ginous. Legs testaceous ; tibiae black ; fore tarsi ferruginous ; posterior tarsi 
white, with brown tips. Wings nearly limpid, with two white and two blackish 
spots on the costa ; tips blackish ; veins black, testaceous along the costa. 
Halteres whitish. Length of the body 4 lines j of the wings 8 lines. 
Mount Ophir. 
Subfam. Achiides, Walk. 
Gen. Achias, Fair. 
116. Achias maculipennis, Westic. Oriental Entomology, 38. pi. 18. f. 4. 
Singapore. Inhabits also Java. 
Subfam. Diopsides, Walk. 
Gen. Diopsis. 
117. Diopsis qttinqueguttata, n. s., foem. Nigra, proboscide pedibusque 
fulvis, his ex parte fuseescentibus, alis nigricantibus basi apice guttisque quin- 
que sublimpidis. ( Plate II. Jig. 7.) 
Female. Black, shining. Proboscis tawny. Petioles of the eyes about half the 
length of the thorax. Scutellum with two spines, which are more than half the 
length of the thorax. Legs tawny, partly shaded with brown. Wings blackish, 
nearly limpid at the base and at the tips, and with two interrupted nearly 
