Simpson and Sheffield Airey Neave were appointed travelling entomologists .
Simpson collected mosquitoes , Tabanids , bed - bugs , fleas , lice and ticks in Nigeria in 1910 followed by visits to the Gold Coast and Sierra Leone .
Simpson and Sheffield Airey Neave were appointed travelling entomologists and he collected mosquitoes , Tabanids , bed - bugs , fleas , lice and ticks in Nigeria in 1910 followed by visits to the Gold Coast and Sierra Leone .