Gen. LONCHOEA, _Fallen_.
165. LONCHOEA ? PUNCTIPENNIS. _Foem._ Nigra, nitens, capite antico
argenteo, antennarum articulo 3° longe-conico, arista plumosa, tarsis
halteribusque piceis, alis cinereis basi nigris puncto costali nigro.
_Female._ Black, shining, with several stout bristles; head silvery in
front; face flat; antennæ short; third joint elongate-conical, arista
very plumose; abdomen oval, convex, a little shorter and narrower than
the thorax; tarsi and halteres piceous; wings grey, black at the base,
with a black costal point at the tip of the subcostal vein; veins
yellowish, black at the base; costal vein black; discal transverse vein
straight, upright, parted by less than its length from the border, and
by nearly twice its length from the præbrachial transverse. Length of
the body 2-1/4 lines; of the wings 4-1/2 lines.
166. LONCHOEA? CONSENTANEA, n. s. _Foem._ Nigra, nitens, arista nuda,
abdomine cyanescente-nigro, alis cinereis, halteribus albis.
_Female._ Black, shining; antennæ black, nearly reaching the epistoma;
3rd joint linear, about thrice the length of the 2nd; arista simple;
abdomen bluish black; wings grey; veins black, testaceous at the
base; discal transverse vein straight, upright, parted by less than
its length from the border and by more than twice its length from the
præbrachial transverse; halteres white. Length of the body 2 lines; of
the wings 3-1/2 lines.
167. LONCHOEA? ATRATULA, n. s. _Foem._ Atra, pubescens, antennis
epistoma attingentibus, arista plumosa, abdomine subovato, alis
nigricantibus.
_Female._ Deep black, pubescent, not shining; antennæ; reaching the
epistoma; 3rd joint linear, rounded at the tip, about four times the
length of the 2nd; arista plumose; abdomen somewhat oval, a little
broader but hardly longer than the thorax; wings blackish; veins
black; discal transverse vein straight, upright, parted by less than
its length from the border, and by about twice its length from the
præbrachial transverse. Length of the body 2 lines; of the wings 3-1/2
lines.
Gen. THRESSA, n. g.
_Foem. Corpus_ breve, crassum. _Caput_ thorace multo latius. _Oculi_
magni. _Antennæ_ epistoma fere attingentes; articulus 3^{us} linearis,
2° plus duplo longior; arista plumosa. _Abdomen_ subovatum, thorace non
longius. _Pedes_ longiusculi. _Alæ_ parvæ.
_Female._ Body short, thick. Head much broader than the thorax; front
wide. Eyes large. Antennæ nearly reaching the epistoma; 3rd joint
linear, rounded at the tip, more than twice the length of the 2nd;
arista plumose. Thorax a little longer than broad; scutellum rather
prominent. Abdomen nearly oval, not longer than the thorax. Legs rather
short. Wings small; costal vein ending at the tip of the wing; radial
vein very near the costa; cubital vein ending at a little in front of
the tip; transverse veins much retracted, very short.
168. THRESSA SIGNIFERA, n. s. _Foem._ Nigra, nitens, capite cyaneo,
antennis pedibusque fulvis, thorace strigis duabus lateralibus albis,
femoribus nigris, alis hyalinis apud costam nigris, halteribus albis.
_Var. β._ Alis apud costam hyalinis macula apicali nigra.
_Female._ Black, shining; head blue; antennæ tawny; thorax with a
white transverse streak on each side; legs tawny; femora black, with
tawny tips; wings hyaline, black along the costa; veins black; discal
transverse vein parted by four times its length from the border, and by
six times its length from the præbrachial transverse; halteres white.
_Var. β._ Wings not black along the costa, with the exception of a
black apical spot. Length of the body 1-1/2 line; of the wings 2-1/2
lines.
Gen. OCHTHIPHILA, _Fallen_.
169. OCHTHIPHILA DISCOGLAUCA, n. s. _Foem._ Fusca, capite thoracisque
disco glucescente-albidis, arista plumosa, thorace lineis duabus
lateralibus albidis, abdomine lineis transversis vittaque albidis,
tibiis tarsisque rufescentibus, alis cinereis, halteribus testaceis.
_Female._ Brown; head glaucous-whitish; antennæ black, nearly reaching
the epistoma; third joint conical, arista plumose; thorax with a very
broad glaucous-whitish stripe, a whitish line on each side and two
on each side of the pectus; abdomen oval, a little shorter than the
thorax, with a whitish band on the hind border of each segment and with
a whitish stripe, the whitish hue appearing tawny in some aspects;
tibiæ and tarsi reddish; wings gray; veins black; discal transverse
vein straight, upright, parted by much less than its length from the
border, and by nearly twice its length from the præbrachial transverse;
halteres testaceous. Length of the body 2 lines; of the wings 4 lines.
Gen. CELYPHUS, _Dalman_.