It has two broad leaves and a single narrow, greenish brown to reddish flower with a black, insect-like callus covering the upper surface of the labellum.

There is a glandular tip 7–10 mm (0.3–0.4 in) long on the end of each lateral sepal.

The labellum is diamond-shaped, 7–10 mm (0.3–0.4 in) long and 4–5 mm (0.16–0.20 in) wide with a black, insect-like callus covering most of its upper surface.

[2][3] Chiloglottis diphylla was first formally described in 1810 by Robert Brown and the description was published in Prodromus Florae Novae Hollandiae et Insulae Van Diemen.

[4][5] The common wasp orchid grows in moist places in shrubby forest on the coast and ranges between Carnarvon Gorge in Queensland and Batemans Bay in New South Wales.