45 
Tabanus gabonensis, Macq. 
(PI. iv, fig. 15) 
Localities :— Lukolela (July, Rev. Whitehead); Ikelemba and 
Lopori rivers (March, Nov., Major Malfeyt) ; Baringa (July, Dr. 
Angela); Nouvelle Anvers (April, Dr. Miiller). 
Circumstances of capture :— Most of the specimens were taken by 
persons travelling on the rivers by steamer or in canoes. 
Tabanus gratus, Loew 
This species was caught in March, 1903, on the Kunchau ( reek, 
about 175 miles up the Gambia River. 
Tabanus par, Walk. 
(PI. iv, fig. 6) 
A single specimen of this insect was caught on board a steamer 
plying on the Gambia River. 
'Tabanus pluto, Walk. 
(PI. iv, fig. ;) 
This Tabanid was caught in the Congo near the river at Matadi 
and Kisantu. 
Tabanus nijipes, Macq. 
(PI. iv, fig. 8) 
Localities: Matadi (?); Tshumbiri (April, Nov., Rev. Billing- 
ton); Bolengi; Lulanga; Lisala; Stanley Falls; Wanie Numbu ; 
Kasuku ; Tshofa; Pania Mutombo; Lusambo. 
C ircumstances of capture : — This fly was caught only near water, 
usually while attempting to bite passengers in canoes or steamers. 
Field notes : — They fly very rapidly and strongly, and have been 
seen at over 100 yards from the banks of the river. They seem to be 
very local. For example, near Pania Mutombo ten or a dozen were 
seen at the same moment darting about a canoe. A little further 
down the river towards Lusambo none were seen for miles. 
Tabanus tarsalis, Adams 
(PI. iv, fig. 13) 
1 his insect was only seen once, at Lutete. 
