s
albidis.

_Female._ Cinereous. Head whitish; third joint of the antennae short,
conical, whitish, blackish at the tip, arista plumose; thorax with a
brown stripe; scutellum whitish; abdomen black; legs whitish, with black
bands; wings white, with many blackish spots, some of them confluent;
discal transverse vein straight, parted by much less than its length
from the border, and by a little less than its length from the
praebrachial transverse; halteres whitish. Length of the body 1-1/2 line;
of the wings 3 lines.

146. TRYPETA SUBOCELLIFERA, n. s. _Mas._ Cana; antennis albidis; thorace
guttis fuscis, scutelli margine albido; abdomine fusco apicem versus
cano maculis fuscis; pedibus albidis fusco fasciatis; alis limpidis,
maculis nigricantibus pallido signatis ex parte confluentibus.

_Male._ Hoary. Antennae whitish, third joint short, conical, arista
plumose; thorax with some slight brown dots; scutellum brown, hind
borders of the scutellum white; abdomen brown, hind borders of the
segments and apical part cinereous, the latter with brown dots; legs
whitish, with brown bands; wings limpid, with several blackish dots
containing pale marks, some of them confluent and forming a middle band;
discal transverse vein straight, enclosed in a pale streak, parted by
much less than its length from the border and by much more than its
length from the praebrachial transverse; halteres whitish. Length of the
body 1-1/2 line; of the wings 3 lines.

Subfam. ACHIIDES, _Walk._

Gen. ACHIAS, _Fabr._

147. ACHIAS LONGIVIDENS, n. s. _Mas et Foem._ Viridi-cinerea; capite
testaceo fasciis duabus vittisque tribus anticis nigris; antennis
nigris; thorace vittis quatuor purpureo-nigris, pectore ferrugineo;
abdomine viridi-fulvo; pedibus piceis; alis limpidis, costa
lurido-nigricante, vena transversa discali fusco nebulosa; halteribus
testaceis apice nigris. _Mas._ Oculis longissime petiolatis, scutello
viridi, femoribus basi fulvis. _Foem._ Oculis subpetiolatis, scutello
nigro-purpureo.

_Male and Female._ Greenish cinereous. Head with two black bands on the
vertex and with four black stripes in front; antennae black, third joint
linear, very long, arista plumose; thorax with four purplish black
stripes, middle pair abbreviated hindward and having behind them a spot
of the same hue, lateral pair interrupted; pectus ferruginous; abdomen
tawny, with bright green reflections, testaceous beneath; legs piceous;
wings limpid, blackish, an