Ichneumon, huins ichneumonis, m. ge. Plin. A ratte of India or% greatnes of a cat, which crepeth into % Crocodils mouth when he gapeth, and eating his bowels killeth him. It is also akinde of waspes.
Lewis and Short: Latin dictionary
ichneumon, ŏnis, m., = i)xneu/mwn. I.An animal which tracks the crocodile and destroys its eggs; the Egyptian rat or ichneumon, Plin. 8, 24, 35, 88; 8, 25, 37, 90 sq.; Cic. N. D. 1, 36, 101; Mart. 7, 87, 5; Nemes. Cyneg. 54.—II.An insect, the ichneumon-fly, Sphex sabulosus, Linn.; Plin. 10, 74, 95, 294; 11, 21, 24, 72.