NEW CEYLON DIPTERA. 391 
propleuron to slightly beyond mesopleural bristles, a fourth 
along sternopleural suture, broadening on to whole of meta- 
pleuron and metanotum, thus ringing lower and hind margins 
of thorax with black. All bristles black, preesutural wanting, 
pteropleural and sternopleural weak. Intermediate scutellar 
weak. Halteres pale yellow. 
Abdomen.—Broadest at junction of second and_ third 
‘segments. Yellow, with slight concolorous pubescence dor- 
sally. A black transverse band occupying basal half of 
second segment and a broad black longitudinal stripe along 
dorsal margins of third to sixth segments, leaving only the 
median area yellow. Venter yellowish throughout. Ovi- 
positor as Jong as whole abdomen, yellow, darkening apically. 
Short black bristles along sides of segments two to six. 
Legs yallow, posterior tibiz black, except apices. Front 
femora with seven bristles beneath, basal three weak. Mid 
tibize without bristles. 
Wings.—Ground colour yellow, stigma wholly black. 
Beyond stigma a marginal black band graduaiiy broadening 
from end of first vein to middle of third posterior cell, where 
its width is nearly half that of the wing, extending into discal 
cell. Along third vein this band is broadly and rectangularly 
extended as far inwards as a point in line with extremity of 
first vein. A hyaline marginal lunule in second posterior cell. 
From stigma a broad black band extends basally to sixth vein 
beyond anal cell, apex of which alone is infuscated. There is 
an outward extension of this band over the anterior cross-vein 
almost to join the inner margin of apical band in discal cell, the 
area of separation being itself faintly infuscated. Axillary 
and second basal cells slightly infuscated. 
First vein ending in the middle between the auxiliary 
and second veins. Anal cell prolonged to a point hardly in 
advance of second basal cell. No costal bristle. 
Long (with ovipositor) : 9 mm. 
Described from a unique female in good condition taken on 
window. Suduganga, Matale, Ceylon, March 4, 1920. 
Type in my own collection. 
This species apparently comes in Rioxa, though the absence 
of the presutural bristle is contrary to a generic character. 
