Albert Mocquerys, a commercial collector of natural history specimens, visited Venezuela from September 1893 through May 1894 and collected a wide range of organisms; plants, birds, insects, fishes, mammals, and fossil shells. Walter Rothschild evidently was his principal zoological patron and Emmanuel Drake del Castillo his botanical one. In Venezuela, Mocquerys established himself at Puerto Cabello and made three trips inland. The first was to localities near Barquisimeto; the second to the cave of the “guácharo” near Caripe; and the third was to the Venezuelan Andes near Mérida. Details concerning his collections and their present-day whereabouts are presented as is a gazetteer of localities associated with his collecting trips. Biographical data also clarify that Mocquerys was the third generation of a family of French dental surgeons, all of whom were accomplished naturalists with a special interest in entomology.