A medium-sized species of Ectemnius.

One of the smaller Ectemnius species, resembling a small E. continuus, but much less frequent.

Identification keys and hosts are given in Morgan (1984) and Archer (2003). Kunz (1994) treats this species as synonymous with C. ignita. Niehuis (2000) considers C. angustula to be a valid species consisting of two subspecies.

A large Ectemnius closely resembling the common E. continuus, but considerably scarcer. Formerly known under the names zonatus (Panzer, 1797), saundersi (Perkins, R.C.L., 1899) and quadricinctus (misidentification). The last name was also shared with E. cephalotes, making some old records impossible to assign.

Historically the less common of our two Mellinus species and possibly now extinct in Britain. In M. crabroneus, the abdominal markings are ivory coloured and not yellow (as in M. arvensis)

A large Ectemnius resembling the common E. cavifrons but scarce in most areas. Formerly known under the names nigrifrons (Cresson, 1865) and planifrons (Thomson, 1870).

This species was previously included in the genus Astata.

This is probably not a native British mainland species.