IQI5. | E. BRUNETTI: Notes on Oriental Syrphidae. 235 
other known species, and I have described an additional species 
from Darjiling, annulata @ 9? , v-12 and iv-13 (Rec. Ind. Mus., 
1, 270, ‘o 9, pl. Xiv, 11-15, I9r3). 
Xylota bistriata, mihi, sp. nov. 
x 2 Cochin. Long. 1I—13 mm. 
Head.—Eyes in o@ practically contiguous for about lower 
third of distance from vertex to base of frons. Width of vertex 
about one-eighth that of head, vertex blackish aeneous with a 
little pale hair, the small ocelli distinct, reddish. Eyes in 9 
separated by a frons about one-eighth the breadth of the head, 
widening a little at base of antennae. 
Face and frons blackish, covered with yellowish white tomen- 
tum; antennae covered with yellowish grey dust, arista black, 
base brownish yellow. Occiput blackish grey, with whitish dust ; 
some bright yellow short hairs along top of head, intermixed 
behind vertex with black ones. Ocular orbit with a fringe of 
short white hairs which are longest on under side of head. 
Thorax.—Dorsum greenish aeneous, with short and rather 
thick bright yellow pubescence. A pair of well separated pale 
median longitudinal stripes bearing short bright yellow hairs, be- 
coming indistinct posteriorly but just attaining the scutellum, 
which latter is also greenish aeneous with short yellow pubescence 
and a fringe of short yellow hairs below hind margin. Sides of 
thorax blackish aeneous, nearly bare; sternopleura and mesopleura 
with a grey tinge and bearing some short yellow pubescence. 
-Humeri apparently bare; but if viewed from behind they are seen 
to bear some short yellow pubescence. 
Abdomen.-——Blackish aeneous with a dull steel tinge, which on 
the 2nd segment in the @ may occasionally shew, seen from be- 
hind, a pale violet reflection; basal segment a little darker; on 
hind margin of both 2nd and 3rd segments a large dull black (seen 
from behind) sub-triangular spot, the apex reaching nearly to the 
base on the 2nd segment, but only to the middle on the 3rd seg- 
ment. Dorsum of abdomen with microscopic dark hairs, sides 
with short pubescence, which is longer towards the base and is 
yellowish in the ~ and white in the @. Genitalia in ~ globular, 
of a dull steel colour, with some yellow hairs ; ovipositor brownish 
yellow. 
Legs.--Coxae aeneous, grey-dusted ; hind pair with soft pale 
hair below. Anterior legs yellowish with short concolorous pubes- 
cence, which is longest on inner side of middle tibiae; tips of 
middie femora narrowly brown. Anterior tibiae longitudinally 
streaked irregularly with brown on inner and outer sides, last 
tarsal joint brown. Hind femora considerably incrassate, brown- 
ish yellow with a broad blackish brown median band, and the tips 
datk brown ; a moderately long distinct black spine below at base 
and on the under side towards tip, an outer row of 6 to 8 black 
spines of moderate size, gradually diminishing in length posteriorly , 
