ENTOMOLOGY 853 
records from this territory are: Matadi; Lutete; Leopoldville; near Miambwe 
(Newstead, Dutton and Todd); Uele River (Brumpt; according to this observer 
the native name of this fly is ‘‘furu’”’ on the Uele); and Djamba on the Itim- 
biri River (Schouteden). 
UaGanpba. — Jinja, near the Ripon Falls, April 19, 1927. 
If all the published records of H. damnosum are based on correct identifica- 
tions, this species is very widely distributed in tropical Africa, since it is known 
at present from French Guinea, Sierra Leone, Liberia, Togo, Southern Nigeria, 
Cameroon, the French Congo, the Belgian Congo, the Anglo-Egyptian Sudan, 
Uganda, and Tanganyika Territory (Morogoro). In the main, however, its 
area corresponds in extent with that of the West African Subregion. 
At Gbanga, Liberia, HZ. damnosum was very abundant at times in the town, 
freely biting man at all hours of the day. As has been noted before, it is an ex- 

ue 

Text Figure 4. — Husimulium damnosum 
(Theobald). Female 
tremely bloodthirsty insect and, when it leaves its victim after feeding, a droplet 
of blood oozes from the bite. It does not appear to enter completely enclosed 
houses or huts, but it was often seen biting under the cover of the open sheds 
that serve as rest-houses or meeting-places in the Liberian villages. A number 
of the flies caught in the town at Gbanga were dissected and microfilariae were 
found in the gut in one case, while the thoracic muscles of another fly contained 
larvae similar to those figured by Blacklock as belonging to the life-cycle of 
Onchocerca volvulus. These findings are fully discussed in one of the Medical 
chapters of this Report (see p. 240). It is of interest that specimens of HL. dam- 
nosum caught along the banks of a stream, away from human habitations, were 
not found infected with worms.’ 
A careful study of the numerous specimens from the widely separated lo- 
ealities enumerated above discloses no specific differences. It should be noted 
that some of these specimens were obtained in the type locality of the species. 
E. damnosum is best recognized by the structure of the fore tarsi, which are very 
broad and swollen, and by the shape and coloration of the hind tarsi: the 
1 Bequaert, J. 1929. ‘The insect carrier of Onchocerca volvulus in Liberia.’ Fourth Intern. Congr. 
Entom., Trans., pp. 605-607. 
