DIPTERA. 30) 
Tacuina TRIcrNoTA, Mas. 
Nigra; caput album; thoraw canus, nigro quadrivittatus ; abdominis seg- 
menta cano fasciata ; ale sublimpide. 
Black: head shining white; frontalia deep black, linear; facialia beset 
with bristles along two-thirds of the length from the base; epistoma not 
prominent; eyes bare; palpi luteous : feelers black ; third joint ferruginous 
beneath at the base, linear, slightly rounded at the tip, reaching the epi- 
stoma, more than four times the length of the second ; sixth near twice the 
length of the third, stout towards the base: chest with a hoary covering 
which has four black stripes: abdomen oval, a little longer than the chest, 
with a hoary band on the base of each segment: wings almost colourless ; 
veins black, tawny at the base; prebrachial vein forming a very obtuse 
angle at its flexure, straight from thence to its tip which joins the cubital 
vein on the border above the tip of the wing; lower cross-vein with a slight 
inward curve in the middle: alule white. Length of the body 23 lines; 
of the wings 44 lines. 
Madras or Caleutta ? 
Tacuina vitTata, Mas. 
Aurata ; caput antice et subtus album; thoraw nigro quadvivittatus ; ab- 
domen nigrum, segmentis auro fasciatis ; antenne nigre ; pedes 
picei; ale fusca, apice et margine postico sublimpide. 
Black; with a bright gold covering: head white in front and beneath 
where it is clothed with white hairs; frontalia deep black, narrow, linear; 
facialia without bristles: epistoma not prominent: eyes bare: mouth 
black, with a pitchy tip; palpi tawny: feelers deep black; third joint 
almost reaching the epistoma, much more than twice the length of the 
second ; sixth stout and pubescent near the base, slender from thence to 
the tip: chest with four black stripes : abdomen black, obconical, longer 
than the chest, with a gold band on the fore border of each segment : legs 
pitchy ; hips and thighs with a hoary covering ; hips ferruginous : wings 
brown, almost colourless at the tips and along the hind borders ; veins black, 
tawny at the base; prebrachial vein forming a very obtuse angle at its 
flexure, slightly curved inward near the cubital vein to which it closely 
2R 
