s grey, fore branch of the
praebrachial vein much curved inward, discal transverse vein straight;
length of the body 2-1/2--2-3/4 lines; of the wings 5 lines.

Gen. DOLICHOPUS, _Latr._

61. DOLICHOPUS TRIGONIFER, n. s. _Foem._ Cupreo-viridis, facie argentea,
antennis, pedibus halteribusque testaceis, pectore, ventre abdominisque
maculis lateralibus trigonis albidis, abdomine purpureo marginibus
posticis nigris, tarsis posterioribus nigricantibus, alis cinereis.

_Female._ Cupreous green. Face silvery; antennae, legs, and halteres
testaceous; pectus, abdomen beneath, and triangular spots on each side
whitish; abdomen purple, hind borders of the segments black; posterior
tarsi blackish; wings grey, veins black, praebrachial vein forming a
right angle at its flexure, between which and the border it is much
curved inward, discal transverse vein very slightly curved outwards.
Length of the body 3 lines; of the wings 5 lines.

This species resembles the _Psilopi_ in the structure of the praebrachial
vein.

Gen. DIAPHORUS, _Meigen._

62. DIAPHORUS RESUMENS, n. s. _Mas et Foem._ Obscure viridis (mas) aut
niger (foem.), facie pectoreque albidis, antennis piceis, abdomine
nigro-cupreo basi obscure testaceo, pedibus anterioribus tibiisque
posticis basi obscure testaceis, pedibus posticis nigris, alis
nigricantibus apud marginem posticum pallidioribus, halteribus
testaceis.

_Male and Female._ Dark green (male) or black (female). Face and pectus
whitish; antennae piceous; abdomen cupreous-black, dull testaceous
towards the base; hind legs black, hind tibiae towards the base and
anterior legs dull testaceous; wings blackish, paler along the hind
border, veins black, praebrachial vein and discal transverse vein
straight; halteres testaceous. Length of the body 2 lines; of the wings
3-1/2 lines.

Fam. SYRPHIDAE, _Leach._

Gen. CERIA, _Fabr._

63. CERIA SMARAGDINA, n. s. _Foem._ Saturate metallico-viridis,
subtilissime punctata, faciei lateribus cupreis, antennis nigris, arista
nivea, thorace bivittato, abdomine aeneo-viridi, tarsis nigris, alis
dimidio costali nigro, halteribus testaceis.

_Female._ Deep metallic green, very finely punctured. Head blue in
front, sides of the face cupreous-purple; mouth, antennae, and tarsi
black; arista snow-white; thorax with two almost contiguous darker
stripes; abdomen aeneous green, with the exception of the petiole, which
is very thick; wings slightly greyish, costal half black;