98 Mr. E. E. Austen on new 



same level, and discal cell also hyaline, with exception of a 

 few faint darker clouds along the veins, and in case of discal 

 cell vestiges of two or three faint and interrupted darker 

 transverse markings ; light markings in light brown border 

 of tip and hind margin coarse, tending to become confluent; 

 usual sinuous light mark near tip of wing clearly defined, in 

 contact above lower branch of third vein with remains of 

 outer portion of periphery of distal rosette ; usual series of 

 oblique light markings running across posterior cells ; light 

 flecks on hind margin of wing in distal angles of axillary and 

 second and third posterior cells, faint vestiges of similar 

 flecks in distal angles of fourth and fifth posterior cells ; 

 rather more than basal half of axillary cell hyaline, except a 

 faint darkish spot near proximal angle and a broad trans- 

 verse dark mark, which starts from middle of sixth longitudinal 

 vein and does not reach anal angle; appendix to fork of 

 third vein long ; stigma long, clove-brown, conspicuous. 

 Halteres brownish, knob seal-brown at base above and below. 

 Legs : middle and hind tibiae clothed with short, appressed, 

 yellowish hair; first joint of middle and hind tarsi lighter at 

 base. 



Congo Free State : Katanga District, valley of the Lualaba 

 River, between 9° and 10° 40' S. lat., Jan. 1907 (Dr. A. 

 Yale Massey). 



I have much pleasure in naming this prettily marked 

 species in honour of its discoverer, who, by his energy as a 

 collector while acting as Medical Officer to Tanganyika 

 Concessions, Ltd., considerably enriched the National Collec- 

 tion, and made many additions to our knowledge of the 

 blood-sucking Diptera of the south-eastern corner of the 

 Congo Free State. 



Hamatopota masseyi belongs to the same group as the 

 foregoing species; it can be distinguished from all the 

 described species of this group by the large hyaline space in 

 the wing, next the costa and beyond the stigma. 



Hamatopota divisapex, sp. n. 



$ . — Length (3 specimens) 8*25 to 9 mm. ; width of head 

 3 to 3*25 mm. ; width of front at vertex 1 mm. to just over 

 1 mm. ; length of wing 8 mm. 



Brown ; thorax mummy -brown, with grey longitudinal stripes 

 on dorsum ; scutellum fawn-coloured, greyish pollinose ; 

 abdomen clove-brown, hind margins of segments cream-buff, 

 first and second segments ochraceous-bvff on sides and beneath ; 

 frontal callus dark mummy-brown ; wings dark brown with light 



