2S2 Mr. E. E. Austen on new 



Uganda : type and two other specimens from the Nile 

 Province, 1906 {the late Dr. W. A. Densham). With these 

 flies the Museum received from the same collector and 

 locality a damaged ? H(Bmatopota, which, though presenting 

 a sujDcrficial resemblance to H. tenuis, it seems advisable for 

 the present to regard as belonging to a distinct species. 

 The specimen, which is devoid of antennae and front legs, 

 and cannot therefore be described in detail, differs from the 

 three examples of H. tenuis as follows : Dimensions of body 

 larger (length 9"2 mm. instead of 8'2 to 8*4 mm.) ; palpi 

 smaller ; abdominal spots larger and much more conspicuous, 

 sharply defined and distinct on second and third as well as 

 following segments ; dark median stripe on venter more 

 sharply defined ; wings paler, light markings in discal cell 

 and portion of first posterior cell above it different (traus- 

 vers>e marks fused together or in contact), no light fleck on 

 wing-margin beyond apical sinuous mark. The donor's 

 field-note attached to this specimen, but probably meant to 

 apply also to the three examples of H. tenuis, is as follows : — 

 " Found generally throughout the Province; occurs only in 

 small numbers ; frequently bites natives." 



Apart from the species represented by the fourth specimen 

 referred to above, if it be indeed distinct, IL tenuis is dis- 

 titiguishable by its unusually narrow and elongate shape 

 from all of its African congeners at present known to me. 

 From liaematopota fusca, Austen, which also occurs in 

 Uganda, it is further distinguished, inter alia, by its paler 

 coloration, conspicuously striped thorax, only slightly in- 

 crassate first autenual joint, and more fully marked wings. 



H<sniatopota insaiiabilis, sp. n. 



5 . — Length (4- specimens) 6 8 to 8'4mm. ; width of head 

 2'8 to just over 3 mm, ; width of front at vertex just under 

 to just over 1 mm. ; length of wing G'S to 78 mm. 



Stoutlij built species, ivith conspicuous transverse light streak 

 close to apex of wing. — Dorsum of thorax dark hruwn, toith 

 usual three stripes smoke-grey, more or less indistinct exccjd 

 in front ; dorsum of abdomen mummy-brown to dark brown, 

 hind borders of segments greyish buff, third and following 

 segments sometimes each with a pair of yellowish grey admedian 

 spots in contact with front margin; wings sepia-coloured, 

 fairly dark, light markings sharply defined, rosettes and oblique 

 •marks across posterior cells largely broken up into dots ; tegs 

 clove-broivn, middle femora lighter except at tip, front tibia and 

 tarsi black, front libicc with a single broad white or cream- 



