INSECTS AND OTHER ARTHROPOD A 
COLLECTED IN THE CONGO 
FREE STATE 
Being the Seventh Interim Report of the Expedition of the Lire>p> <>l 
School of Tropical Medicine to the Congo. 1003-05 
BY 
ROBERT NEWSTEAD, A.L.S., F.E.S., &c. 
(LECTURER ON ECONOMIC ENTOMOLOGY AND PARASITOLOGY. I III M IL Ol . I 
I ROPICAI. MEDICINE. UNIVERSITY OF I IVKRPOOI i 
The late J. EVERETT DUTTON, M.B. (Vict.) 
(WALTER MYERS FELLOW. UNIVERSITY OF I IVKRPOOI i 
AN I) 
JOHN L. TODD, BA, M.D., C.M. McGill 
(DIRECTOR OF THE RUNCORN RESEARCH LABORATORIES Of III! 
LIVERPOOL SCHOOL OF TROPICAL MEDICINE 
INTRODUCTORY 
This expedition was sent to the Congo Free State, on the 
invitation of His Majesty King Leopold II, by the Liverpool School 
of Tropical Medicine to report upon the sanitary condition of the 
more important posts and to study human trypanosomiasis, 
collection of various biting insects formed, therefore, a principal part 
of its work; but once the more important ones, as (j lossina and 
Anophelina , were obtained in each district the systematic search i : 
insects was discontinued. A large part ot this collection repi«•->« 
then, merely the casual wayside gleanings made during a i"'irn<-\ 
through Central Africa. 
From the point of view of a dipterologist the collection is therefore 
regrettably incomplete, especially so, since a large number • ■' 
specimens have been unavoidably ruined by moulds. Had time hern 
spent in collecting, it is probable that many of those inserts rep- rt.-d 
from only one or two localities would have been found to have a Dr 
wider distribution. 
Twenty-three months were actually spent in the Congo I n-' 
State ; during that time a distance of some 2,000 miles was travelled 
The course followed by the expedition is indicated on the map; while 
