DIPTERA. 305 
of the face ferruginous ; facialia without bristles except at the base; epi- 
stoma prominent: eyes hairy: mouth ferruginous, partly pitchy ; palpi 
tawny : feelers red ; third joint pitchy above, rather deep, linear, slightly 
rounded at the tip, very much longer than the second ; sixth black: abdo- 
men slightly purple: legs black: wings slightly gray; veins black ; pre- 
brachial yein forming a right angle at its flexure which emits a short 
stump beyond it, much curved inward from thence to its tip: alule dingy 
white: halteres tawny with pale knobs. Length of the body 34 lines; of 
the wings 7 lines. 
South America. 
Genus GONIA, Meigen. 
Gonta INDICA. 
Cana, subcervina; caput argentewum ; thorax nigro quinquevittatus ; 
abdomen testaceum, cano-micans, nigro vittatum; antenne fulve, 
apice nigre ; pedes nigri, tibiis ferruyineis ; ale limpide. 
Hoary, with a slight fawn-colour tinge : head pale buff with a silvery 
white covering, clothed beneath with white hairs ; stemmatic region pitchy ; 
frontalia luteous: mouth pitchy ; palpi pale yellow: antenne tawny ; 
third joint from half the length to the tip and following joints black : 
chest with five slender, indistinct and interrupted black stripes : abdomen 
testaceous, with hoary reflections and with a black middle stripe; legs black 
with a hoary tinge; shanks mostly ferruginous : wings colourless; veins 
testaceous, pale yellow at the base: alula white. Length of the body 
5 lines; of the wings 10 lines. 
East Indies. 
Genus DEXIA, Meigen. 
The species here described may be grouped thus : — 
a. Proboscis short. 
b. Prebrachial vein forming a very slightly acute angle at its flexure. 
obscura. 
ws ~o em 
