DIPTDRA. 275 
the second, rounded at the tip; fourth, fifth and sixth joints black ; fifth 
about twice the length of the fourth: disk of the chest gray : abdomen with 
aq black stripe, which is dilated at the base, and does not extend to the tip : 
wings gray, tawny at the base ; prebrachial vein forming a hardly acute 
angle at its flexure, near which it is curved; lower ecross-vein almost 
straight, slightly’eurved outward at ils tip: alule dingy white with tawny 
borders. Length of the body 6 lines; of the wings 12 lines. 
New South Wales. 
-TAcHINA DorsALIs, Mas. 
Nigra, sat angusta; scutellum rufum; abdomen rufum, albo-micans, 
nigro vittatum; antenne fulve; ale cinerea, basi et ad venas 
luride. 
Black, rather narrow, almost cylindrical : head and chest with a cinere- 
ous covering; frontal region beset with very few black bristles; frontalia 
ferruginous, widening towards the feelers ; face and under side pale yellow, 
glossed with white; facialia with a row of bristles which hardly extend 
above the epistoma ; lateralia clothed with short white hairs: feelers tawny ; 
third joint very convex above, deepening from the base to the tip which is 
obliquely truncated, almost as long as the second, and more than twice its 
depth: seutcheon red : abdomen red, glossed with white, and having a black 
dorsal stripe: legs black: wings gray, with a lurid tinge at the base and 
along the borders of the veins ; prebyachial vein forming a slightly acute 
angle at its flexure, near which it is curved ; lower cross-vein very slightly 
waved : alule white. Length of the body 6 lines; of the wings 10 lines. 
Java. 
TacuINa apicatis, Mas et Fem. 
4 
Nigra; caput alhum ; thorax cinereus ; scutellum fulvum ; abdomen cano 
tessellatum apice rufum ; antenne basi fulve ; ale subcineree. 
Black: head white, clothed behind and beneath with very pale yellow 
hairs; crown black; frontalia ferruginous, widening towards the feelers: 
mouth black: feelers black; first and second joints tawny; third about 
half the length of the second; straight beneath, very convex above, its 
height much more than half its length ; orifice near the under side, at half 
