Thank goodness this black and white flea image is not life-sized. These parasitic insects are the scourge of pet owners. But, in case anyone was needing a scientific drawing of a flea; here it is.
The History of Insects was published in 1813 without identifying an illustrator. Which is truly a shame because the work is full of wonderful insect drawings like this one.
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.