187 
ENTOMOLOGICAL RESEARCH IN BRITISH WEST AFRICA. 
I. GAMBIA. 
By Jas. J. Srmpson, M.A., D.Sc. 
(with a Map showing the distribution of Glossina and Sleeping Sickness, and 
13 photographs by the author.) 
CONTENTS. 
PAGE. 
Introductory... ane ob osc = oor SoC eas oc Ishe/ 
I. Insect-borne Diseases... sac vas 506 ae 50 360 ooo ultete} 
Il. Geography and Vegetation 2% 508 50 S00 Sb 600 oon iliske: 
IL. Climate and Rainfall ... 5 a 50 S06 op WE) 
IV. Tribes Inhabiting the Colony =e Bratpgienate S00 ae & a0 LB} 
V. Narrative ... 600 sins Bee 600 nog SNS) 
(a.) reecetctl and ope St. sues é 50 ae cao GES 
(b.) Kerewan to MacCarthy Island (Nort Bank) 306 dot soo HIG 
(c.) MacCarthy Island... 308 atic . 204 
(d.) MacCarthy Island to Tendaba awe 509 oO; Stic ooo. AUS 
(e.) Bintang Creek.. 000 dee 40 boo wee 500 sag UKs) 
(f.) Niumi PRA. 300 ses 200 sop Al 
VI. Records of Blood-sucking Peete pode eam ine Garb ae Me soa i! 
VII. Native names of Blood-sucking Arthropods .. 400 500 ane cea IG) 
VIII. Bionomies of Glossina ... eee C00 00 boc bc ncn AD) 
IX. Remedial Measures and Hecomucndaiions 500 wee sath one en 2z20 
Appendix. Hints for Collectors ais os 206 3p Bn sv» 227 
INTRODUCTORY. 
In this short report it is proposed to deal exclusively with the blood-sucking 
insects and other Arthropods which are, or may be, implicated in the transmission 
of disease in man and animals. In this connection, however, certain aspects, 
geographical and geological, are necessarily involved, but these will be introduced 
only when considered to be directly relevant to the main issue. 
Our knowledge of this subject, in regard to all West African British 
Possessions, is very meagre, but perhaps not more so in any than in the Gambia. 
Prior to the Expedition of the Liverpool School of Tropical Medicine in 1902-3, 
conducted by Drs. Dutton and Todd, little or nothing was known, and since that 
time only a few isolated records and observations, which will be referred to later, 
have come to hand. Several factors exist which may account for this state of 
things, but the most obvious is that only a few of the officials are compelled to 
leave Bathurst in discharge of their duty. Perhaps still more important is the 
fact that those who are interested in such work, and whose observations would 
be of great value, do not possess the small amount of material necessary for the 
purpose. Again the question of technique and the identification of material 
collected have always raised difficulties, but these are now reduced to a minimum, 
anf it is hoped that this short Report, with its appended map," may show how 
* The villages in which human trypanosomiasis was diagnosed by the Expedition of the 
Liverpool delice! of Tropical Medicine in 1911 have been indicated on the map so as to make it 
more complete. For fuller details of these see Ann. Trop. Med. and Paras. Series T. M. 
Vol. V. No. 2, pp. 245-286. 
(21367—Ent, Res.) Wt. P 3528—16, 1000, 11/11, D&§S, A 
