|Dorsal view of Heterogaster urticae|
|Head of H. urticae showing the bulbous compound eye, and to its left, the small, shiny red-pink simple eye or 'ocellus'.|
|The pale, erect hairs on the pronotum of H. urticae. The coarse punctures in the pronotal surface are also visible.|
Southwood, T.R.E. & Leston, D. (2005). Land & Water Bugs of the British Isles. Pisces, Newbury. Edited facsimile of the 1959 work.