OF THE GENUS CHRTSOPS (FAMILY TABANID^). 167 



large, and thickly clothed with white hair ; first and second joints of antenna; 

 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, scutelbim 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, dai-kening 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 foiu'th 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- 

 ground), which indents the costal border, and extends across the wing as far as 

 the point at which the distal margin of the clove-brown transver'se band dies 

 away. Squa.mm clove-brown. Halteres clove-brown. Legs : front tibia? very 

 slightly swollen (somewhat flattened from side to side), hind tibia; distinctly 

 swollen ; coxaj grey, extreme base of front and middle tibia; and proximal half 

 (or less) of first joint of middle and hind tarsi more or less distinctly mvimmy- 

 brown ; coxie 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 tibia;, on which it forms conspicuous 

 fringes. 



East Africa Protectorate : type and one other specimen from Mason- 

 goleni (Uganda Railway), alt. .3,000 ft.. 29. Ill,— 1. IV. 1911 {S. A. Neave). 



Chrysops cana is evidently allied to C welhnanii, Austen, which occurs in 

 Angola and N.-W. and S. Uhodesia, 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. UnfortTmately the female of C. cana and the male of 

 30419 ■ F 2 



