48. ANTHRAX DEGENERA, n. s., mas et fœm. Nigra, pectore albido,
abdominis lateribus ferrugineis, ventre testaceo, alis subcinereis,
pedibus basi testaceis. Mas. Alis basi et apud costam nigro-fuscis.
Fœm. Alis plus dimidio basali nigro-fuscis.
_Male and Female._ Dull black. Head not broader than long. Antennæ
small; 3rd joint short-conical; arista somewhat longer than the 3rd
joint. Pectus whitish. Abdomen blackish-brown, ferruginous on each
side, testaceous beneath. Legs long, slender. Wings greyish; veins
black; radial vein curved towards its tip; fore fork of the cubital
undulating, parallel to the radial, forming near its base an obtuse
angle which emits the stump of a vein; hind fork straight; three
nearly straight externo-medial veins; 2nd connected with the 3rd by
an undulating and very oblique veinlet; subanal vein near the anal
on the border. Halteres testaceous.—_Male._ Hind femora testaceous
towards the base; anterior femora dark testaceous. Wings
blackish-brown at the base and along the costa.—_Female._ Hind
femora testaceous with black tips; anterior femora paler testaceous.
Wings blackish-brown for much more than half the length from the
base. Length of the body 3½ lines; of the wings 10 lines.
Singapore.
Fam. DOLICHOPIDÆ, _Leach_.
Gen. PSILOPUS, _Meigen_.
49. PSILOPUS CLARUS, n. s., mas. Viridis, capite cyaneo, facie
pectoreque albis, antennis nigris, abdominis segmentis
nigro-fascistis, pedibus testaceis, tibiis posticis apice tarsisque
nigris, alis limpidis.
_Male._ Green. Head bright blue, white in front. Proboscis, legs and
halteres testaceous. Antennæ black; arista as long as the thorax.
Pectus white. Abdominal segments with black bands. Legs long; tarsi
and tips of the hind tibiæ black. Wings limpid; veins black; fore
branch of the præbrachial vein slightly curved; hind branch
extending to the border; discal transverse vein rather deeply
undulating. Length of the body 4½ lines; of the wings 8 lines.
Mount Ophir.
50. PSILOPUS ROBUSTUS, n. s., fœm. Purpureo-cyaneus, capite purpureo,
facie pectoreque albis, antennis pedibus halteribusque testaceis,
thorace viridi-vario, abdominis fasciis nigris, tarsis apice
nigricantibus, alis subcinereis.
_Female._ Purplish-blue. Head bright purple, white in front. Proboscis
and antennæ testaceous; arista black, full as long as the thorax.
Thorax green on each side and in front. Pectus white. Abdomen with
black bands. Legs long, pale testaceous; tarsi blackish towards the
tips. Wings slightly greyish; veins black; fore branch of the
præbrachial vein moderately curved; discal transverse vein
moderately undulating. Halteres pale testaceous. Length of the body
2½ lines; of the wings 6 lines.
This may be the female of _P. clarus_.
Singapore.
51. PSILOPUS SUBNOTATUS, n. s., mas. Cyaneus, capite purpureo, facie
pectoreque albis, proboscide antennis pedibusque testaceis, thoracis
lateribus anticis viridibus, abdomine viridi-cyaneo basi apiceque
purpurascente, tarsis apice nigricantibus, alis subcinereis
albido-bifasciatis.
_Male._ Blue. Head purple above, white in front. Proboscis and antennæ
testaceous; arista black, nearly as long as the thorax. Thorax green
on each side in front. Pectus white. Abdomen greenish-blue, purplish
at the base and at the tip. Legs testaceous, rather long; tarsi
blackish towards the tips. Wings slightly greyish, with two
imperfect whitish bands; hind border white towards the tip; costa
interruptedly blackish; veins black; fore branch of the præbrachial
vein almost straight; hind branch extending to the border; discal
transverse vein almost straight, hardly undulating. Halteres pale
testaceous. Length of the body 2½ lines; of the wings 6 lines.
Mount Ophir.
52. PSILOPUS POSTICUS, n. s., mas. Viridis, proboscide antennis
abdominis fasciis pedibusque nigris, tibiis luridis, alis nigris
apud marginem posticum sublimpidis.
_Male._ Dark green. Head above bluish-green. Proboscis and antennæ
black; arista nearly as long as the body. Abdomen with black bands.
Legs black; posterior tibiæ lurid; fore tibiæ testaceous. Wings
black, rather narrow, nearly limpid along the hind border; veins
black; fore branch of the præbrachial vein slightly curved; discal
transverse vein slightly undulating. Halteres black. Length of the
body 2 lines; of the wings 5 lines.
Malacca.
53. PSILOPUS TENEBROSUS, n. s., fœm. Purpureo-niger, facie pectoreque
albis, abdomine purpureo, pedibus fulvis, femoribus apice tarsisque
nigricantibus, alis nigricantibus margine postico fasciâque
sublimpidis.
_Female._ Purplish-black. Head dull black, white in front. Proboscis
piceous. Antennæ black; arista rather shorter than the thorax.
Pectus white. Abdomen dark purple. Legs tawny; tarsi and tips of the
femora blackish. Wings blackish, nearly limpid along the hind
border, and at two-thirds of the length with a nearly limpid band
which extends from the hind border to the cubital vein; veins and
halteres black; fore branch of the præbrachial vein very deeply
curved; discal transverse vein almost straight. Length of the body 3
lines; of the wings 6 lines.
Singapore.
Fam. SYRPHIDÆ, _Leach_.