80 E. E. AUr^TEN — A NEW SPECIES OF AFRICAN DIPTERA. 



more triangular sliape of fourtli segment), hy absence of dark, quadrate, median^ 

 longitudinal mark on dorsum of second abdominal segment, hy dark transverse 

 hand on hind border of same segment being relatively narrower, more sharply 

 defnedj and not or scarcely e.vpanded at sides, ami by distal three-fourths of 

 infero-lateral margins of dorsal scute of fourtli abdomincd segment being 

 approximated so closely on ventral side as to leave but a narroio cleft between them, 

 and being each fringed ivith a dense row of stout, black seta'. 



Mead chrome-yellow, frontal stripe orange-biiff ; area between ocelli dark 



brown ; pcdpi buff- yellow, clothed with black bristles ; proboscis ochraceous- 



rufons^ clothed with ochraceous hair ; antennce (including arista) ochraceous- 



bufF to ochraceous-rufous, second joint clothed above with short black 



bristles, hairs on arista brown ; orbital bristles small, one (sometimes two) 



on each side ; all bristles on head, body and legs black ; jowls and basi- 



occipital region clothed with bright, buff-yellow hair. Thorax : median 



portion of dorsum, between dark longitudinal marks, buff pollinose_, showing 



ground-colour in three darker longitudinal streaks (most conspicuous in front 



of suture), as in figure ; dorsum clothed with fine, erect, black hair, mingled, 



especially towards hind margin, with bright, buff-yellow hair ; pleurge greyish 



poUinose, clothed with bright, buff-yellow hair, upper part of mesopleurse 



with black hair ; infero-lateral margins of scutellum clothed with bright, 



buff-yellow hair. Abdomen : dorsum clothed with minute, appressed, black 



hairs ; yellow area on third segment sometimes of much less extent than that 



shown in figure^ being confined to a narrow edging on front margin, and a 



small and scarcely visible notch-like median indentation in anterior edge of 



black area ; fourth segment in each of the three specimens available for 



comparison showing a median depression on upper surface ; amount of yellow 



on this segment variable in extent, and sometimes greater than shown in figure, 



almost reaching front margin in middle line, front margin and basal angles 



being also luirrowly yellow ; tip of fourth segment with a row of stout black 



set?e, from three to five on each side of middle line, as in figure ; first 



segment clothed below for the most part with bright ochraceous hair ; 



incurved portions of dorsal scutes of remaining segments clothed, like dorsum, 



with minute black hairs, mixed with bristles in case of fourth segment, and 



with ochraceous hairs in case of second, and to a lesser extent in that of third 



segment. Wings : veins taw^iy to muunny-brown, extreme base and part of 



first longitudinal vein below humeral cross-vein ochraceous. Squamce : alar 



pair hyaline or nearly so, with thickened border ochraceous-buff : thoracal 



squamee buff or cream-buff, semi-opaque. Halteres buff. Legs clothed with 



black hair and bristles ; claws black, ochraceous-rufous at base. 



Cape Colony : Deelfontein, 24. xii. 1902 (Colonel A. T, Sloggett, C.M.G., 

 R.A.M.C.)—iY])Q; Natal: Durban, vi. 1891 (Dr. H. A. Spencer); N.W. 

 Rhodesia : Kasempa District, 3500-4500 ft., 1909 (E. A. Copeman). 



Type and two other specimens in the British Museum (Natural History). 



