Of the Sarcopsyllidae the best known species is the "jigger" or "chigoe" (Dermatophilus penetrans), indigenous in tropical South America and introduced into West Africa during the second half of last century.
The banded duiker (C. doriae) from West Africa is golden brown with black transverse bands on the back and loins.
His argument as to the narrowness of the sea between West Africa and East Asia, from the occurrence of elephants at both extremities, is difficult to understand, although it shows that he looked on the distribution of animals as a problem of geography.
One noteworthy feature in Liberia, however, is the relative absence of mosquitoes, and the white ants and some other insect pests are not so troublesome here as in other parts of West Africa.
Nowhere, perhaps, does the flora of West Africa attain a more wonderful development than in the republic of Liberia and in the adjoining regions of Sierra Leone and the Ivory Coast.
