Most of the creepy-crawlies are unpleasant but not generally lethal, like the flea or the bedbug.
Even the cobra does not kill many because it is too large to survive in competition with housing estates and roads.
The Anopheles mosquito spreads malaria and the Culex mosquito distributes Nile fever and a number of other nasty diseases round the tropics.
Biodiversity notwithstanding, I for one wouldn't weep if they went extinct tomorrow.
I am indebted to Emma Golding, assistant archivist at the LSHTM, for identifying the creatures.