36 MR. walker's catalogue of dipterous insects 



behind the 1st ; 3rd on the costa near the tip ; 4th larger, apical, near the 

 5th, which is on the Imid border. Length of the body 5 lines ; of the -wings 

 10 Hnes, 

 Singapore. 



Gen. XiRiA, n. g. {Plate II. fg. 2.) 



Mas. Corpus metallicolor, subsetosum. Caput latiuseulmn. Falpi longiusculi. 

 Antennce breves ; articulus 3"^ subhnearis ; arista late plumosa. Thorax ro- 

 bustus. Abdomen lincare, thorace pauho longius et miilto angiistius. Pedes 

 longiuscidi, sat vahdi. Aim mediocriter longpe latoeque. 



Male. Body metallic, slightly setose. Head rather broad, hardly narrower than 

 the thorax ; epistoma not prominent. Proboscis short. Palpi porrcct, rather 

 long and stout. Antennce short, not nearly reacliing the epistoma ; 3rd jomt 

 almost hnear ; arista deeply plumose, much more than twice the length of tlie 

 3rd jomt. Thorax stout. Abdomen linear, a httle longer than the thorax and 

 about half its breadth. Legs rather long and stout. Wings moderately long 

 and broad ; subcostal veia ending at rather beyond one-thu-d 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 obhque, parted by about half its 

 length from the border, and by rather more than its leugtli from the prse- 

 brachial transverse. 



115. XiRiA ANTiCA, n. s., mas. Purpurea, capite nigro, antennarum articulo 3° 

 ferrugiaeo, pedibus tcstaceis, tibiis nigris, tarsis albis anticis ferrugineis, alis 

 sublimpidis a^oice nigricantibus maculis costaUbus albis et nigricantibus. 



Male. Purjile. Head and appendages black. Tliird joint of the antennte ferru- 

 ginous. Legs testaceous ; tibice black ; fore tarsi ferruginous ; posterior tarsi 

 white, with browni tips. Wings nearly Ihnpid, with two wliite and two blackish 

 spots on the costa ; tips blackish ; veins black, testaceous along the costa. 

 Halteres wliitish. Length of the body 4 Uiaes ; of the wmgs 8 Hnes. 



Moimt Ophir. 



Siibfain. Achiides, WalJc. 

 Gen. AcuiAS, Fahr. 



116. Achias macidipennis, Westw. Oriental ^Entomology, 38. pi. 18. f. 4. 

 Singapore. Inhabits also Java. 



Siibfam. DiOPSiDES, Walk. 

 Gen. Diopsis. 



117. Diopsis quinqueocttata, n. s., focm. Nigra, proboscide pedibusque 

 fulvis, his ex parte friscescentibus, ahs nigricantibus basi apice guttisque quin- 

 que sublimpidis. {Plate IT. Jicf. 7.) 



Female. Black, sliinmg. Proboscis ta^vny. Petioles of the eyes about half the 

 length of the thorax. ScuteUum with two spines, which are more than half the 

 length of the thoi'ax. Legs ta\vuy, partly shaded with brown. Wings blackish, 

 nearly limpid at the base and at the tips, and ynXh. two interrupted nearly 



