OF THE GENUS CHRYSOPS (FAMILY TABANID#). 167 
large, and thickly clothed with white hair; first and second joints of antenne 
and extreme base of third joint shining, remainder of third joint dull, first joint 
strongly swollen and clothed, except on distal extremity, with outstanding whitish 
hair, second joint (which is also relatively stout and rather short) and tip of first 
joint clothed with black hair. Thorax plumbeous, scutellum mouse-grey, entire 
thorax clothed with erect white hair. Abdomen milk-white ; first segment with a 
large, median, clove-brown blotch, extending from base to hind margin but not 
reaching posterior angles ; basal angles of first segment, an elongate, quadrate, 
median blotch on second segment, extending from base and occupying proximal 
three-fourths, and fourth and two following segments, except posterior angles and 
hind margins, cinereous ; third segment also sometimes with a faint and ill-defined 
cinereous blotch in centre, beyond middle, and a somewhat more distinct blotch 
of similar colour on each lateral margin ; venter (except posterior angles of first 
segment, lateral thirds and hind margin of second segment, and hind margins of 
four following segments) slate-grey, darkening more or less to clove-brown in 
middle line except near hind borders of segments ; ventral scute of third segment 
sometimes with a pair of more or less ill-defined, cream-buff-coloured, admedian 
blotches ; hairy covering of dorsum of abdomen shorter and more recumbent than 
that of thorax ; ventral scutes of third and three following segments clothed with 
minute, appressed hairs. Wings: clove-brown area occupies extreme base 
(including proximal extremities of both basal cells), costal border to a point just 
short of apex of wing, and forms an equally sharply defined median transverse 
band, which includes extreme tips of both basal cells as well as stigma and portion 
of wing immediately beyond it; the transverse band reaches the hind margin ; 
of the wing only at the apex of the anal cell, since in the fourth and fifth posterior 
cells, except on the proximal border of the latter, it dies away (see fig. 3) ; 
beyond the clove-brown transverse band, and in contact with its distal margin, 
is a narrow milky band (visible when the wings are seen against a dark back- 
eround), which indents the costal border, and extends across the wing as far as 
the point at which the distal margin of the clove-brown transverse band dies 
away. Squame clove-brown, Tlalteres clove-brown. Legs: front tibie very 
slightly swollen (somewhat flattened from side to side), hind tibie distinctly 
swollen; coxe grey, extreme base of front and middle tibie and proximal half 
(or less) of first joint of middle and hind tarsi more or less distinctly mummy- 
brown; coxe and middle and hind femora, except distal extremities, clothed 
with white or whitish hair ; legs elsewhere clothed with black hair, which is long 
and fine on posterior and postero-ventral surfaces of front femora, but otherwise 
short, except on inside and outside of hind tibiw, on which it forms conspicuous 
fringes. 
Hast AFRICA PROTECTORATE: type and one other specimen from Mason- 
goleni (Uganda Railway), alt. 3,000 ft.. 29. III.—1. IV. 1911 (S. A. Neave). 
Chrysops cana is evidently allied to C. wellmaniit, Austen, which occurs in 
Angola and N.-W. and 8. Rhodesia, and with which it agrees in the shape of the 
head and eyes, coloration of the face and facial hair, absence of a facial tubercle 
or facial tubercles, coloration of the thorax and its hairy covering, and in 
the wing-markings. Unfortunately the female of C. cana and the male of 
20419 F 2 
