222 Mr. E. E. Austen on new 



Hyhthj infuscaled and variegated ivith vestiges of the usual 

 light marks, but central area of wing devoid of markings and 

 se7ni-hy aline ; legs dull tawny, tips of tarsi darker. 



Head grey on front, yellowish grey on face and jowls ; 

 frontal callus dark brown, sometimes more or less ochraceous, 

 very narrow from above downwards, up2)er margin often 

 produced upwards into a triangular prominence in middle 

 line; blackisli-hrown or black spot on each side of front 

 well marked, when seen from above it apjjcars surrounded 

 by a very light grey area, median frontal spot absent ; palpi 

 cream-buff, clothed on outer side with black hair intermixed 

 with some ochraceous hairs ; antennae short, first and second 

 joints ochraceous buff, first joint slightly incrassated, clothed 

 bke the second with black hair, third joint dark brown, 

 ochraceous at base, last three annuli black, last annulus 

 about equal in length to the two preceding annuli taken 

 together. Thorax : dark stripes on dorsum often not 

 reaching front margin ; scutellum with a brown fleck on 

 each side, which is sometimes obsolete. Abdomen: olive 

 patches on second and majority of following segments 

 usually quadrate in shape, lateral margins of segments grey ; 

 venter with an olive median stripe. Wings : area devoid of 

 markings includes basal, anal, and discal cells, and proximal 

 two-thirds of first submarginal and first posterior cells ; 

 second and third posterior cells also uithout markings at 

 extreme base; stigma elongate, dull tawny ochraceoiis to 

 dark brown, conspicuous. Legs : front tarsi reddish brown, 

 last joints of middle and hind tarsi brown. 



Angola : type and five other specimens from the vicinity 

 of Bailundo, November to December 1904 {Dr. F. Creighton 

 Wellman) ; one specimen from Benguella, 1905 {Dr. F. C. 

 Wellman). When forwarding these flies Dr. \yellman 

 wrote: — "I took about 60 specimens of this species in long 

 grass in a treeless valley, and in thin bush on the side of a 

 mountain, 220 to 30(3 miles from the coast. Sluggish, 

 Eyes bright green when alive. Some specimens were 

 infested with a minute red tick /^ Like the foregoing species, 

 Hamatopoia semiclara is allied to H. unicolor, Ricardo, 

 but it ]s distingaished by its smaller size, more slender 

 shape, less swollen first antennal joint, and by the wing- 

 markings, inter alia by the discal cell being entirely semi- 

 hyaline. 



Genus Tabaxus, Linn. 

 Tabanus denshamii, sp. n. 

 ? . — Length (4 specimens) 17 to 21 mm. ; width of head 



