DIPTERA. 91 
Dasypocon inserens, Mas. 
Piceus, capite, thoracis vittis tribus lateribus scutello metathorace pectore 
abdominisque fasciis flavis, antennis piceis basi fulvis, pedibus ferru- 
gineis, femoribus nigro vittatis, alis fulvis apice margineque postico 
cinereis. 
Head adorned with a yellow covering, beset behind the eyes with a 
fringe of black bristles; crown pitchy, shining; epistoma armed with 
about twenty white spines: eyelets tawny: eyes bronzed ; fore part flat 
and composed of very large facets: sucker black; palpi dark tawny, beset 
with black bristles: feelers dark tawny ; first and second joints beset with 
black bristles ; third pitchy, clothed with a few black hairs, tawny at the 
base, slightly spindle-shaped, nearly twice the length of the first and the 
second joints: chest pitchy ; three stripes, sides, scutcheon, hind part and 
breast mostly yellow : abdomen pitchy, narrower than the chest and less 
than twice its length, tapering from the base to the hind border of the se- 
cond segment, slightly spindle-shaped from thence to the tip, beset with 
black bristles on each side of the base, adorned with yellow bands ; the 
first broad, on the first and second segments; the second and third rather 
narrow, on the hind borders of the second and third segments ; the fourth 
very narrow on the hind border of the fourth segment ; tip clothed with 
brown hairs; legs dark ferruginous, armed with black spines; thighs 
streaked with black ; claws and tips of feet black; tip-spines of fore-shanks 
black, very much curved ; foot-cushions yellow: wings dark tawny, paler 
on the disk, gray at the tips and along the hind border till near the base, 
where they are paler; wing-ribs and yeins ferruginous; poisers tawny, 
with yellow knobs. Length of body 10 lines; of the wings 18 lines. 
? 
DasyeoGon occrpENs, Mas. 
Niger, auratus, thorace vittis duabus ferrugineis ornato, abdomine ferru- 
gineo vittis aureis et piceis ornato, antennis rufis, pedibus fulvis, alis 
cinereis, nervorum marginibus subfulvis. 
Head adorned with a golden covering ; a row of tawny bristles behind 
the eyes; crown pitchy, shining, beset with black bristles ; epistoma armed 
with about twenty white bristles: eyes bronzed; fore part flat, the facets 
ile ~_ >» , 
oy ede es we sd, 9. eee eee SF ae _ _ = —_—— 
