DIPTBRA, out 
UBRISTES, n. g. 
Microdonti similis. Caput thorace latius: antenne longe ; articulus 
lus longissimus, subcurvus; 2us brevissimus; 3us linearis, apice coni- 
cus, lo paullo longior: tarsi lati; tibie postice pilose. 
Allied to Mierodon. Male. Head broader than the chest: feelers 
long; first joint very long, slightly curved; second very short; third 
linear, conical at the tip, a little longer than the first; fourth springing 
from near the base of the third: feet rather broad, especially the hind pair ; 
hind-shanks very hairy: wing-veins like those of Microdon, but the middle 
cross-vein beneath the submarginal areolet is a mere stump. 
Usristes riavirrpia, Mas, Plate 5, fig. 2. 
Nigro-enea, scutello piceo, abdominis apice fulvo, antennis rufis, pedibus 
piceis, larsis fulvis, tibiis posticis flavis flavoque hirtis, alis cinereis — 
bast et ud costam fuscis. 
Body black, shining, clothed with black hairs; a white spot at the 
base of the feelers: face thinly clothed with white hairs, adorned with two 
white spots on each side: eyes black; fore part nearly flat, its facets a 
little larger than those elsewhere: mouth pitchy: feelers very dark red ; 
first joint clothed above with very short black hairs: chest slightly bronzed ; 
scutcheon pitchy ; a purple tinge on the base of the hind-chest: abdomen - 
nearly spindle-shaped, a little narrower and much longer than the chest ; 
tip dark tawny: legs pitchy, thickly clothed with short black hairs; feet 
dark tawny; claws black, tawny towards the base; fvot-cushions pale 
tawny ; hind-shanks pale yellow, thickly clothed with bright yellow hairs: 
wings gray, dark brown at the base and along two-thirds of the fore bor- 
der; wing-ribs pitchy; veins black: poisers pitchy, dark tawny towards 
the base. Length of the body 5 lines ; of the wings 10 lines. 
Brazil. 
