African Pliltbotomic Dijjtera. 221 



border; two sinuous streaks running across tips of sub- 

 marginal cells, beyond fork of third vein, the distal streak 

 breaking up into a series of detached markings running 

 across the posterior cells ; axillary cell faintly tinged with 

 brown, with a broad pale streak running parallel with the 

 wing-margin and continued along the sixth vein, thus 

 enclosing an area of darker colour ; l)asal, anal, and discal 

 cells, proximal two-thirds of first posterior cell, and bases of 

 remaining posterior cells not infuscated ; a faint dark 

 marking usually visible across middle of discal cell; stigma 

 dark brown, conspicuous, llalteres light russet to brown, 

 stalk yellowish. Legs : tibiae ochraceous buff, clothed with 

 minute ochraceous hairs, distal two-thirds of front tibiai 

 brown ; front tarsi dark brown, middle and hind tarsi lighter 

 brown, ochraceous buff at base. 



Uganda, Nile Province : type and three other specimens 

 taken between Nimule and Wadelai, June 1906 {the late 

 Dr. W. A. Denshani) ; two additional specimens from Nimule, 

 November 1904, " on cattle " {Capt. E. D. W. Greig, I.M.S.). 

 Named in memory of the late Dr. W. A. Densham, who, 

 Mhen forwarding his specimens, wrote as follows : — '^ This 

 species was a great pest in June 1906 between Nimule and 

 Wadelai, especially where the grass was long. It did not 

 occur particularly near water, but chiefly along native paths, 

 through open rolling grassy country. Natives are much 

 annoyed by its bite." 



Hamatopota denshamii is closely allied to H. similis, 

 llicardo, and H. unicolor, Ricardo, both of which also occur 

 in Uganda; from the former, however, it is distinguished by 

 the colour of the basal joints of the autenna2, the deeper 

 frontal callus, and the last annulus of the third joint of the 

 antennae being as long as the two i)receding joints taken 

 together, instead of but little longer than either ; from 

 H. unicolor it may be distinguished by the colour of the 

 Irontal callus, and by the first joint of the antennae not being 

 swollen. 



Hccmutopota semiclara, sp. n. 



? . — Length (7 specimens) 7-5 to 9-6 mm. ; width of 

 head 225 to 2'6 mm. ; width of front at vertex 0*8 mm. to 

 1 mm. 



Greij, hndy narrow ; thora.r light olive-grey, with four 

 lighter or darker brown longitudinal stripes ; abdomen olive- 

 grey, second to sixth segments inclusive more or less olive on 

 each side of median line, leaving a narrow light median strij)e ; 

 wing-)narkings exceedingly faint, tip of iving and hind border 



