14 
MB. WALKER’S CATALOGUE OE DIPTEROUS INSECTS 
faseiatis, pedibus testaceis, femoribus tibiisque apice tarsisque nigricantibus, 
alia sublimpidia apice nigricantibus. 
Male. Cinereous. Head with yellowish- white tomentum, clothed beneath 
with white hairs ; face very slightly convex towards the epistoma. Mystax 
with a few testaceous, and with still fewer black bristles. Proboscis black, 
slightly lanceolate, rather slender. Antennse tawny ; 3rd joint and arista 
black, the latter four times the length of the former which is fusiform. 
Thorax with two brown stripes. Pectus hoary. Abdomen with a hoary 
band on the hind border of each segment. Legs testaceous, with very few 
black bristles ; tarsi, except at the base and tips of the femora and of the 
tibiae, black ; hind femora and hind tibiae mostly black. Wings nearly 
limpid, blackish towards the tips ; veins black. Halteres testaceous. Length 
of the body 7 lines ; of the wings 14 lines. 
Malacca, 
42. Asilus latifascia, n. s., mas. Cinereo-nigcr, capite albido, mystace 
testaceo, thoracis vittis quatuor peetoreque canis, abdomine ferrugineo, basi 
apiceque nigris, pedibus fulvis nigro-variis, alis nigricantibus margine pos- 
tico fusco. 
Male. Black, with a slight cinereous tinge. Head with some whitish hairs 
beneath. Pace whitish, flat. Mystax with many pale testaceous bristles. 
Proboscis straight, slightly lanceolate. Antenna: black. Thorax with four 
slight hoary stripes. Pectus hoary. Abdomen ferruginous, black at the 
base and towards the tip. Legs tawny ; tarsi, hind femora, and tips of the 
posterior tibise black ; anterior femora black above. Wings blackish, brown 
along the hind border ; veins black. Halteres testaceous. Length of the 
body 9 lines ; of the wings 16 lines. 
Singapore. 
43. Asilus Barium, Walk. Cat. Dipt. pt. 2. 426. 
Mount Ophir. Inhabits also Ceylon and Sumatra. 
Gen. Ommatius, Illiger. 
44. Ommatius Pennus, Walk. Cat. Dipt. pt. 2. 469. 
Malacca. Inhabits also Sumatra, Borneo, and Corea. 
45. Ommatius Hecale, Walk. Cat. Dipt. pt. 2. 476. 
Singapore. 
46. Ommatius gracilis, n. s., mas. Nigro-fuscus, facie atrft, thoracis late- 
ribus peetoreque canis, pedibus fulvis, femoribus tibiisque apice tarsisque 
nigris, alis sublimpidis apice cinereis. 
Male. Blaekish-browm. Face flat, deep black. Proboscis black, rather slender, 
slightly lanceolate. Antennae black. Pectus and sides of the thorax hoary. 
Abdomen dull black. Legs tawny ; tarsi and tips of the femora and of the 
tibise black. Wings nearly limpid, dark grey towards the tips ; veins black. 
Halteres testaceous. Length of the body 6 lines ; of the wrings 10 lines. 
Mount Ophir. 
