ee ee ae a Ha si: 
DIPTERA. QTT 
joint stout, very long ; sixth short, stout except at the tip : chest with four 
black stripes : legs black: wings colourless ; veins black, tawny at the base ; 
prebrachial vein forming a very obtuse angle at its flexure, beyond this it 
is very slightly inclined inward, and ends on the tip of the wing, where 
it approaches very near the cubital vein; lower cross-vein straight: alule 
white : halteres tawny, with pitchy knobs. Length of the body 14 line; of 
the wings 3 lines. 
United States, 
TacHINA ExuL, Fem. 
Canescens ; caput album; abdomen cinereum ; antenne articulo 30 basi 
fulvo ; pedes nigri; ale albide. 
Black, with a hoary covering : head with a white covering; frontalia 
whitish fawn-colour, slightly widening towards the feelers; facialia without 
bristles ; epistoma not prominent: mouth and palpi black : feelers pitchy ; 
first and second joints extremely short; third tawny at the base, reaching 
the epistoma, divided into two parts, which are linear, rounded at the tips, 
and of equal length ; upper part bent upward; fourth joint very short; 
fifth slightly bent, tawny at the base, full four times the length of the 
fourth; sixth stout, lanceolate, much longer than the fifth: abdomen ob- 
conical, cinereous, a little shorter and broader than the chest: legs blach : 
wings whitish ; veins tawny ; prebrachial vein forming a very obtuse angle 
at its flexure, hardly bent inward from thence to its tip, which ends at very ‘ 
little in front of the tip of the wing; lower cross-vein almost straight, 
very remote from the border: halteres tawny. Length of the body 14 line; 
of the wings 3% lines. 
United States. 
TacHina INsOLtrA, Fem. 
Nigra; ale cinerea, basi flave. 
Black: head prominent and angular in front above the feelers, with a 
white oblique stripe on each side; frontalia striated; facialia without 
bristles; epistoma slightly prominent: eyes bare: palpi black, slender: 
feelers black ; second joint tawny at the tip; third full twice the length of 
the second, straight above, slightly convex beneath, tawny above at the 
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