alteres white. Length of the body 4 lines; of the
wings 8 lines.

Gen. HELOPHILUS, _Meigen._

74. Helophilus quadrivittatus, _Wied. Auss. Zweifl._ 11. 168. 22.
(Eristalis).

Inhabits also Hindostan.

75. HELOPHILUS MESOLEUCUS, n. s. _Foem._ Niger, faciei lateribus niveo
tomentosis, thorace vittis quatuor canis, scutello, abdominis fascia
antica latissima interrupta basique lutescentibus, alis cinereis, venis
basi halteribusque fulvis.

_Female._ Black. Face with snow-white tomentum on each side; thorax with
four hoary stripes; pectus with a cinereous disk; scutellum pale
luteous; abdomen pale luteous at the base, and with a broad interrupted
pale luteous band on the second segment, third and fourth segments
somewhat chalybeous, the former livid along the fore border, under side
with two lateral abbreviated pale luteous stripes; hind femora thick;
wings grey, veins towards the base, and halteres, tawny. Length of the
body 6-1/2 lines; of the wings 12 lines.

Gen. XYLOTA, _Meigen._

76. XYLOTA VENTRALIS, n. s. _Foem._ Nigro-chalybea, capite albido
tomentoso, scutello fulvo, vittis duabus ventralibus latis abbreviatis
testaceis, pedibus piceo et testaceo variis, alis fuscis basi cinereis,
halteribus testaceis.

_Female._ Blackish chalybeous. Head with whitish tomentum, excepting the
callus on the vertex and another on the front; mouth and antennae black;
scutellum tawny; abdomen beneath with two very broad testaceous stripes
extending from the base to two-thirds of the length; legs dingy
testaceous, femora and hind tibiae partly piceous, hind femora thick,
piceous, slightly chalybeous, armed with spines beneath; wings dark
brown, cinereous towards the base; halteres testaceous. Length of the
body 4-1/2 lines; of the wings 8 lines.

Gen. ORTHONEURA, _Macq._

77. ORTHONEURA BASALIS, n. s. _Foem._ Chalybeo-nigra, nitens,
cano-subtomentosa, antennis ferrugineis basi fulvis articulo tertio
elongato, tarsis posterioribus piceis, tarsis anticis tibiisque
anterioribus fulvis, his nigro fasciatis, alis subcinereis fusco
fasciatis, halteribus testaceis.

_Female._ Chalybeous-black, very shining, partly and slightly covered
with hoary tomentum; antennae tawny, third joint ferruginous, long,
linear, tawny at the base; anterior tibiae tawny with a black band, fore
tarsi tawny, hinder tarsi piceous; wings greyish, with a subapical brown
band which is abbreviated hindward, veins towards the base and halteres
testaceous; a