87 
Stomoxys omega, n. sp. (Newstead) 
(PI. iii, figs. 2, 3) 
Wings dusky, strongly' irridescent in a bright light. Thorax 
blackish, shining, anterior half in front of transverse suture pale 
greyish-blue, with a distinct JVshaped black design in the male; in 
the female the submedian black lines blend with the black colour in 
front of the suture so that the up-curved terminals of the /V shaped 
markings become indistinct. Abdomen, smoky-brown. 
Male. Head: Eyes almost meeting, the narrow space between 
them, above, velvety black ; frontal margins and clypeus silvery-white. 
Basal segment of antenna blackish; second segment brown; apical 
segment silvery-grey ; arista brown ; posterior surface of head velvet) 
black ; lower angles silvery-white with black hair. Proboscis black, 
shining; labella with many, very long, fine outstanding hairs. 
t horax in front of the median transverse suture grey-blue, with a 
large /^-shaped black design, consisting of two distinct broad sub 
median longitudinal stripes which curve upwards before reaching the 
suture and form two conspicuous rounded dilations; thorax below 
/he transverse suture black, shining, with a rather broad band of dusky 
grey-blue in front of the scutellum, which is continuous to the base of 
the wings ; scutellum smoky-brown, shining; with one central and 
two lateral black bristles ; the thorax is also clothed with fine blackish 
hairs, and there are three bilateral black bristles at the sides in front 
of the wings; pleurae in front delicate grey-blue, a small area at base 
of wing pale brown. Abdomen hairy; smoky-brown, the segments 
gradually darkening towards the apical margins, especially so at tIn¬ 
sides ; in perfect specimens there is a broad basal band on the second, 
third and fourth segments of faintly greenish-grey dust, each band is 
interrupted in the middle ; the last segment almost entirely clothed 
with a paler grey dust; venter pale dusky-brown. Legs relatively 
long, smoky-brown, blackish in some lights; knees pale brown 
Length, exclusive of proboscis, 6 mm.; length of wing y mm. 
Female. Head with the space between the eyes relatively 
narrow; vertex, blackish, shining; margins and clypeus pale bluish 
grey, bright but scarcely silvery ; posterior surface of the head similar 
to that in the male, but the sides below have a broader margin of 
blue-grey. Apical segment of antenna dusky-grey. Thorax in Iron! 
