BY FREDERICK A. A. SKUSE. 
1205 
united to the first longitudinal vein by a sub-costal cross-vein ; 
first longitudinal vein joiniug the costa far beyond the middle of 
the anterior border of the wing ; marginal cross-vein situated 
considerably before the middle of the first longitudinal vein ; third 
longitudinal vein starting a little before the marginal cross-vein, 
very little arcuated, reaching the margin far below the tip of the 
wing, no anterior bi’anch ; fourth longitudinal vein a little arcu- 
ated, the anterior branch detached, appearing as a short piece of a 
vein joining the margin ; fifth longitudinal missing. 
163. Trizygia flavipes, sp.n. (PI. xxxii., fig. 12). 
(J. — Length of antennee 0 030 inch ... O’ 76 millimetre. 
Expanse of wings 0 070 x 0 030 ... L77 x 0’76 
Size of body O’OSOxO’015 ... 2-02 x 0-38 
Antennse rather slender, about as long as the head and thorax 
taken together; joints of the scapus and first joint of the flagellum 
ochracecus, the remainder of the flagellar joints sooty-brown, with 
a greyish pubescence. Head black, with a short greyish-yellow 
pubescence. Hypostoma black. Palpi ochraceous-brown. Thorax 
deep brown, almost Vjlack, levigate, densely covered with a greyish- 
yellow pubescence, the lateral margins and scutellum setiferous ; 
jjleime, scutellum, and metathorax deep brown. Halteres wholly 
yellow, with apparently no pubescence. Abdomen about twice the 
length of, and almost as wide as, the thorax, deep brown, rather 
densely clothed with greyish-yellow hairs ; anal joint and forceps 
deep brown, densely haired. Legs long, moderately i-obust, ochre- 
yellow, the tibite and tarsi darker on account of their dense 
minute pubescence ; hind femora slightly Ijrownish at the apex ; 
tibial spurs .same colour as the tibite and tarsi, the lateral spines 
brown. In the fore-legs the tarsi nearly twice the length of the 
tibite ; the latter longer than the metatarsus. Wings longer than 
the abdomen, rounded off at the base, almost hyaline, microscoi)i- 
cally pubescent, the hairs of two lengths, the longer ones less 
numerous than the smaller, the latter most numerous on the apical 
part of the wing ; the apex of the wing, also behind the apical 
