The specific epithet, harriettae, honours natural history illustrator Harriet Scott, who illustrated Gerard Krefft's The Snakes of Australia, including this species.

The upper surface of the body is dark grey to black, with broad white bands extending from the snout along the sides of the head to meet at the nape.

[3] C. hariettae is oviparous,[2][3] with an average clutch size of five (range 2–10).

[3] The distribution of C. hariettae extends from Mount Abbott, near Proserpine in eastern Queensland, south-eastwards to north-eastern New South Wales.

[3] C. harriettae occurs in moist habitats, including rainforests and wet sclerophyll forests as well as suburban gardens.