260 DIPTERA. 
This genus is allied to Morinia, but differs by the arista being short-plumose. The 
single species referred to it is easily recognizable by the coloration of the wings. 
1. Pseudomorinia pictipennis, sp.n., ¢. (Tab. VI. figg. 14; 144, head.) 
Black ; thorax grey, with obsolete black lines; abdomen with grey front borders to the segments; wings with 
the costa blackish and the disc yellowish. 
Length 6°5 millim. 
Head black, the face and cheeks with silvery-white reflections; front trigonal, on its upper part scarcely sepa- 
rating the eyes. Antenne black, the basal joints somewhat testaceous ; third joint twice as long as the 
second ; arista slightly thickened at the base. Proboscis and palpi brownish-black, the palpi a little 
thicker towards the tip. Thorax black, with a bluish-grey tomentum, anteriorly with two not very 
distinct black lines ; scutellum black. Abdomen black; the second and following segments with bluish- 
gtey front borders and with discal and marginal macrochete. Legs black; front tibie with short, the 
middle and hind tibie with longer bristles; foot-claws and pulvilli somewhat elongate, the pulvilli 
yellowish. Tegule greyish-yellow. Wings grey; a brownish-black stripe on the costa, limited by the 
first vein, and below this there is a clear yellowish space, this colour extending to the disc and to the 
base of the wings; the costa at the apex is marked with an obscure diffuse spot which includes the end 
of the second vein; small cross-vein a little beyond the middle of the discal cell ; apical and posterior 
cross-veins slightly concave. 
Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith). 
A single male specimen. 
MORINIA. 
Morinia, Robineau-Desvoidy, Essai sur les Myodaires, p. 264 (1830). 
Head hemispherical ; front of the male much narrowed behind, that of the female broader; face perpendicular, 
not carinated; eyes bare, descending nearly to the lower part of the head; vibrissal swellings parallel ; 
vibrisse inserted at the oral margin or at a short distance above it. Antenne usually short, their base in 
a line with the centre of the eyes; arista long-plumose. Proboscis short; palpi cylindrical. Abdomen 
subcylindrical ( 3 ) or elongate-oval ( 2 ), with discal and marginal macrochete or with marginal macrochete 
only. Legs of moderate length ; foot-claws and pulvilli elongate in the male. Wings longer than the 
abdomen, hyaline or somewhat infuscated towards the base and costa, but without any yellow coloration ; 
apical cell opened at the wing’s tip; curvature of the fourth vein with a blunt angle, or even somewhat 
rounded ; posterior cross-vein at or nearly at the middle between the small cross-vein and the curvature 
of the fourth vein. 
This genus contains rather small flies of a black coloration. In the Central-American 
collections there are representatives of three species, generally agreeing with the Euro- 
pean ones, except that they have the antenne longer ; but upon this character alone 
I am not inclined at present to separate them generically. None of the Central- 
American species have discal macrochete on the abdomen. For the rest they may 
be distinguished as follows :— 
1. Thorax black, anteriorly with three white spots . . . . . trichopoda, v. d. Wulp. 
Thorax anteriorly grey or cinereous, with black stripes. . . 2. 
2. Front tarsi longer than the tibie ; eyes separated (gf). . longitarsis, v.d. Wulp. 
Front tarsi not longer than the tibie ; eyes contiguous towards 
the vertex (¢) . cote eee we ww fumata, v. d. Wulp. 
