OF THE GENUS CHRYSOPS (FAMILY TABANID®). 165 
stripes, which, starting from front margin, disappear on or shortly before 
reaching transverse suture, and are again visible close to posterior margin, 
where they curve round on to the postalar calli; lateral borders of dorsum 
and distal two-thirds or three-fourths of seuiellum clothed with chrome-yellow 
pollen and short, bright hair of same colour; pleure and pectus clove-brown, 
thinly clothed with yellowish-olivaceous pollen except between and above front 
cox, on upper border of mesopleure, on metapleure and upper posterior angles 
of hypopleurz, and on posterior angles and hind margin of sternopleure, where 
ground colour is concealed by patches of Naples-yellow pollen and bright, chrome- 
yellow hair; base of scutellum mummy-brown. Abdomen: blackish longitudinal 
stripes on dorsum, as shown in fig. 2, extending from middle of first to or nearly 
to middle of third segment, most distinct when abdomen is viewed at a low angle 
from in front or behind; when abdomen is viewed vertically from above the 
stripes appear very faint, though, as shown in the figure, each stripe includes a 
distinet clove-brown blotch on the first segment, and also a smaller, similarly 
coloured fleck near the hind margin of the second segment ; on first segment, in 
middle line and in contact with hind margin, is a minute and inconspicuous, dark 
brown spot ; except on the blackish stripes, which are clothed with minute black 
hairs, the dorsum is covered with minute, appressed, ochre-yellow hairs in the 
case of the first and second segments, and with similar ochraceous hairs in that 
of the third and fourth segments ; remaining segments clothed with minute, dark 
brown hairs; sides of first two segments clothed with finer and longer, pale 
yellow hairs ; lateral margin of dorsal scute of second segment occupied by a 
clove-brown, longitudinal stripe, which is sometimes prolonged at least to middle 
of third segment; venter clothed with minute, appressed, ochraceous or ochre- 
yellow hairs, and similar to dorsum as regards ground colour, but without a trace 
of longitudinal stripes, though third and fourth segments sometimes each with a 
dark brown, median blotch. Wings: costal cells and an oblique area (paler in 
first submarginal cell) beyond oblique dark brown mark extending from stigma to 
posterior branch of fifth longitudinal vein (see fig. 2) raw-sienna-coloured ; apex 
of wing occupied by a fairly dark, sepia-coloured band, commencing on costal 
border just beyond stigma, filling approximately the distal fourth of the wing, 
and extending back along hind border into fifth posterior cell, which it entirely 
fills ; main stem and fork of fifth longitudinal vein suffused with dark brown ; 
stigma dark mummy-brown. Sguame blackish. Halteres clove-brown, base of 
stalk paler. Legs: middle and hind cox clove-brown, hind femora more or less 
brown on outer side, except at base; coxa on outer side sparsely clothed with 
bright, ochre-yellow hairs, femora clothed chiefly with short, ochraceous hair, 
hairy covering of remainder of legs dark brown or brownish ; front tibix 
moderately incrassate. 
Ucanpa Prorecrorate: type and one other specimen (the latter presented 
by the Entomological Research Committee) from Buanuka, Chagwe, April, 1910 
(Captain A, D. Fraser, R.A.M.C.). 
The nearest known allies of Chrysops centurionis are C. dimidiata, v.d. Wulp, 
and C. silacea, Austen, to both of which the new species presents a general 
resemblance. From the former of these C, centurionis, while exhibiting a fairly 
20419 F 
