91. MERODON INTERVENIENS, n. s. _Mas._ Fuscus, flavescente-cinereo
tomentosus, capite testaceo, antennis nigris, arista nuda, scutello
fulvo, abdomine fasciis septem ventreque testaceis, pedibus fulvis,
femoribus nigro vittatis, femoribus posticis incrassatis, tibiis
posticis nigris, alis cinereis litura costali nigricante, halteribus
flavis.
_Male._ Brown; head with short black hairs on the vertex, white behind,
pale testaceous, and with a brown stripe in front; proboscis and antennæ
black; arista simple; thorax thickly clothed with yellowish cinereous
down; scutellum tawny; pectus cinereous; abdomen cylindric-conical,
with seven testaceous bands; under side testaceous; legs tawny; femora
striped with black; hind femora incrassated; hind tibiæ curved, black;
wings cinereous, with a blackish mark by the middle of the costa; veins
black, halteres yellow. Length of the body 6 lines; of the wings 10
lines.