( 2 3 2 ) 
each wing. Scutellum with spatulate scales. Wings hyaline with onl 
median scales except for a few lateral scales on the first long vein air 
sometimes one or two scales on the first fork cell; fork cells "remarkabf 
short less than one-sixth the total length of the wing. Palpi four-jointed i 
the female, three-jointed in the male about one-seventh the length of th 
proboscis in both. 
Remarks. Only one species of this genus at present known. Th 
characters are very distinctive and quite warrant the formation of a nev 
genus. It is closely allied on the one hand to Colonemyia and in somi 
points to Skeiromyia, and on the other hand to Uranotaenia. In fact i 
links on the Uranotaenias to Colonemyia and Skeiromyia and through then 
to the Wyeomyia ; hence its name. 
Zeugnomyia Gracilis, n. sp. 
Body slender. Proboscis as long as, or longer than, the abdomen 
Head clad with purple-black scales with a pearly-white margin to the eyes 
Prothoracic lobes pearly-white. Thorax brownish-black, glistening, anc 
clad with narrow black scales; and a broad patch of pearly-white scales 
which begins in front of the wings and passes almost vertically downward: 
over the pleura. Fork cells very short. Wings hyaline. 
Female Head. Head black, entirely covered with broad scales with 
rounded ends those in front being racquet-shaped; on the vertex is a patch 
of glistening pearly-white scales, and along each orbital margin are 
similar scales ; the rest of the scales are black with a slight brownish tinge 
in a good light; there area few black upright forked scales behind. Basa! 
joint of antenna black, with pearly-white scales except on the outer surface, 
remaining joints black, with black verticils. Clypeus black and nude. 
Palpi slender, about one-seventh the length of the proboscis four-jointed, 
two first joints short, of equal length ; third joint about four times as long as 
the first, swollen and ovoid in shape, fourth joint slender, and as long as the 
others combined. Proboscis very long, longer than the abdomen, it and 
the palpi clad with black scales. 
Thorax. Prothoracic lobes black with pearly-white elliptical scales 
Mesonotum black clad with brownish-black narrow-curved scales. In 
front of the wings, and extending inwards from the margin is the beginning 
of a line of flat pearly-white scales which instead of running forward 
as is usual, runs vertically downwards forming one with a broad line on 
either pleura. Most of these scales are oval but a few are long with 
rounded ends. Mesonotal bristles black. Pleurae dark purple running 
vertically down the centre is a broad line of pearly-white broad scales j 
with rounded ends which begins in front of the wings on the mesonotum. 
Scutellum black, clad with spatulate black scales and bristles which 
are black in the living fly and blackish-brown in the dried specimen. 
Wings hyaline (this feature is specially noticeable in the fresh specimen) I 
clad with dark brown scales; there are a few spinose scales on the anterior 
edge of the costa; all veins with a single row of narrow median scales and 
without lateral scales; fork cells very small, of equal length, the first being 
narrower than the second, the stem of the first cell is quite twice as long as 
the cell; posterior cross vein quite close to the median. Coxae dark brown i 
