OF THE GENUS CHRYSOl'S (FAMILY TABANID.E). 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 scniellum clothed with chrome-yellow 

 pollen and short, bright hair of same colour ; pleurte and pectus clove-brown, 

 thinly clothed with yellowish-olivaceous pollen except between and above front 

 coxa;, on upper border of mesopleura;, on metapleuraj and upper posterior angles 

 of hypopleura;, and on posterior angles and hind margin of sternopleura;, 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 

 distinct 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. IJ'ings : costal cells and an oblique area (paler in 

 first submarginal cell) beyond oblique dark brown mark extending from stigma to 

 posterior bi-anch of fifth longitudinal vein {see fig. 2) i-aw-s:enna-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. Squama blackish. Halteres clove-brown, base of 

 stalk ijaler. Legs : middle and hind coxa; 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 tibia; 

 moderately incrassate. 



Uganda Protectorate : 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 Clirysops 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. centurmiis, while exhibiting a fairly 



20419 5" 



