DIPTERA. 39 
size, and larger than those elsewhere: sucker black; palpi pale yellow, 
clothed with short black hairs: feelers ferruginous, clothed with short 
black hairs ; first joint tawny ; third armed with a very short acute tooth, 
whose tip is black ; compound joint black towards the tip: chest pitchy, 
thinly clothed with tawny hairs, ferruginous on each side, where it is also 
clothed with black hairs: abdomen obconical, dark reddish brown, a little 
longer and narrower than the chest, clothed on each side with tawny hairs, 
adorned with three tawny stripes which are also clothed with tawny hairs ; 
the middle stripe is partly brown, and more distinct than the side pair; 
under side tawny, with a hoary tinge, black towards the tip, and having a 
broad black middle stripe along the first and second segments: legs tawny, 
clothed with short black hairs; thighs black towards the base, clothed with 
white hairs; feet and fore-shanks ferruginous, with black tips ; fore-feet 
and hind-thighs black, tips of the latter tawny ; foot-cushions tawny : 
wings gray, dark tawny at the base and along three-fourths of the length 
of the fore border; wing-ribs and veins ferruginous, the latter black to- 
wards the tips; angle of the tip cross-vein obtuse, not very distinct, bearing 
a knob, or indication of a stump; scales ferruginous ; poisers tawny, with 
yellow knobs. Length of the body 6 lines ; of the wings 12 lines. 
South America. 
TaBanus porstvirra, Fem. 
Cinereo-ferrugineus, thoracis vittis tribus lateribus pectoreque canis, ab- 
domine flavo-fusco, vitta dorsali et segmentorum marginibus posticis 
subtus pallidioribus, antennis bast pedibusque fulvis, femoribus cine- . 
reis, tarsis piceis, tarsis anticis nigris, alis subcinereis basi et ad costam 
subfulvis. 
Body dull ferruginous : covering of the head dark brown above, pale 
tawny beneath where it is clothed with pale yellow hairs; crown adorned 
with a pitchy, shining, club-shaped ridge which is tawny in front: eyes 
brassy, parted above by a moderately broad interval ; facets very small, but 
slightly increasing in size towards the inner fore border: sucker black ; 
palpi pale tawny, clothed with very short black hairs ; first and second 
joints of the feelers tawny, clothed with short black hairs, tip of the first 
above, of the second above and beneath lengthened, angular: chest tinged 
with gray, adorned with three hoary stripes; sides and breast hoary, the 
latter partly clothed with whitish hairs; abdomen yellowish brown, obco- 
“ 
