and by about its length from the praebrachial transverse.
Length of the body 3-1/2 lines; of the wings 6 lines.

143. TRYPETA DORSIGUTTA, n. s. _Mas._ Atra; capite piceo vitta testacea,
subtus albo; antennis testaceis; thorace cinereo punctis lateralibus
albis, pectore albido; abdominis segmentis testaceo marginatis; tibiis
albido fasciatis, tarsis albidis; alis albo-limpidis, strigis basalibus
fasciisque duabus latis nigricantibus, prima antice furcata; halteribus
albis.

_Male._ Deep black. Head piceous, with cinereous tomentum, white behind
and beneath, a testaceous stripe on the vertex; antennae testaceous,
black at the base, third joint conical, white at the base, arista
plumose; thorax with cinereous tomentum, white points along each side;
pectus whitish; hind borders of the abdominal segments testaceous with
cinereous tomentum; tibiae with a dingy whitish band; tarsi dingy
whitish; wings limpid white, with several blackish marks towards the
base and with two broad blackish bands, the first forked in front;
discal transverse vein nearly straight, parted by less than its length
from the border, and by more than twice its length from the praebrachial
transverse; halteres white. Length of the body 2-1/2 lines; of the wings
4 lines.

144. TRYPETA BASALIS, n. s. _Mas._ Nigra, nitens; capite antennisque
fulvis, vertice maculis duabus piceis; abdomine basi pedibusque
testaceis; alis limpidis, striga basali, fasciis tribus costaque apicali
nigricantibus; halteribus testaceis.

_Male._ Black, slender, shining. Head tawny, with two elongated piceous
spots on the vertex; antennae tawny, third joint linear, rather long,
arista bare; abdomen nearly fusiform, testaceous at the base; legs
testaceous; wings limpid, with a blackish oblique streak extending from
the base, with three blackish bands, and with a blackish costal streak
extending round the tip, first and third bands slender, second broad,
abbreviated like the first hindward; discal transverse vein straight,
parted by about one-fourth of its length from the border, and by less
than its length from the praebrachial transverse; halteres testaceous.
Length of the body 1-1/2 line; of the wings 3 lines.

145. TRYPETA IMPLETA, n. s. _Foem._ Cinerea; capite albido; antennarum
articulo tertio albido apice nigro; thorace vitta fusca, scutello
albido, abdomine nigro; pedibus albidis nigro fasciatis; alis albis,
maculis plurimis nigricantibus ex parte confluentibus; halteribu