Raspail first described and illustrated the Sarcoptes scabei, diffrentiating it from the horse's sarcopt and the cheese moth that Galès and Patrix, followed by Alibert, had confused with the scabies parasite. Raspail published this Memoir following experiments by Simon François Renucci, who was the first to extract the acarus and place it under the microscope in August 1834. Renucci published his discovery after the present publication of Raspail in his inaugural thesis on the discovery of the insect which produces the contagion of scabies, prurigo and phlyzacia. (No. 4027). Renucci's thesis was sustained on April 6, 1835. Raspail illustrated his pamphlet with two plates, the first of which, representing the human scabies or sarcopte, was printed his own drawings. 

Digital facsimile from the Internet Archive at this link.