50. Anthrax semiscita, _Walk._ See Vol. I. p. 118.

51. Anthrax degenera, _Walk._ See Vol. I. p. 15.

Gen. GERON, _Meigen._

52. GERON SIMPLEX, n. s. _Mas._ Ater, antennis pedibusque nigris, alis
subcinereis, halteribus fulvis.

_Male._ Deep black. Eyes bright red; proboscis a little longer than the
thorax; antennae and legs black; wings slightly greyish, veins black;
halteres tawny. Length of the body 2-1/2 lines; of the wings 5 lines.

Fam. EMPIDOAE, _Leach._

Gen. HYBOS, _Fabr._

53. HYBOS BICOLOR, n. s. _Mas._ Fulvus, ore antennisque testaceis,
abdomine, femoribus posticis apice tibiisque anticis piceis, tarsis
anterioribus ferrugineis, alis obscure cinereis.

_Male._ Tawny. Mouth and antennae testaceous; abdomen, hind femora at the
tips, and fore tibiae piceous, anterior tarsi ferruginous; wings dark
grey, veins black. Length of the body 3-1/2 lines; of the wings 7 lines.

Fam. DOLICHOPIDAE, _Leach._

Gen. Psilopus, _Meigen._

54. Psilopus aeneus, _Fabr. Syst. Antl._ 268. 9.

Inhabits also Java.

55. PSILOPUS BENEDICTUS, n. s. _Mas et Foem._ Aureo-viridis, facie
pectoreque argenteis, antennis testaceis apice nigris, thorace vittis
tribus cupreis, abdomine fasciis cupreo-purpureis, maculis lateralibus
albidis, pedibus testaceis tibiis posticis tarsisque nigris, alis
subcinereis, costam versus et apud venas transversas nigro-fuscis,
halteribus testaceis. _Foem._ Vertice cyaneo-purpureo, abdomine fasciis
cyaneis.

_Male and Female._ Golden green. Face silvery; antennae testaceous, black
towards the tips, arista full as long as the thorax; thorax with three
cupreous stripes; pectus silvery; abdomen with cupreous purple bands and
with whitish spots along each side; legs testaceous, tarsi and hind
tibiae black; wings slightly greyish, blackish brown along the costa and
about the transverse veins, veins black, fore branch of the praebrachial
vein curved inward, discal transverse vein undulating; halteres
testaceous. _Female._ Vertex bluish purple; abdomen with blue bands.
Length of the body 4--4-1/2 lines; of the wings 7-8 lines.

56. PSILOPUS LUCIGENA, n. s. _Mas._ Aureo-viridis, facie pectoreque
argenteis, antennis tarsisque nigris, thorace vittis tribus
rufo-cupreis, abdomine fasciis cupreo-purpureis, femoribus
lutescentibus, tibiis piceis, femoribus anticis apice nigricantibus,
alis nigris apice albis, halteribus fulvis apice nigris.

_Male._ Golden green. Face and pectus silvery; antennae blac