Urtica dioica, Grebbeberg, Kaaistoep: “head” and rear end

Urtica dioica, Kaaistoep, Grebbeberg: mandible and detail of the unusually heavy spinulation

Urtica dioica, Grebbeberg: mouth field, and detail of the “upper lip”, in lateral view; remarkable is a median bundle of fine, elongated papillae

Urtica dioica, Kaaistoep:front spiracula and anal field

Urtica dioica, Kaaistoep: rear spiracula lateral and dorsal; the fan-shaped setae are vaguely visible

Urtica dioica, Kaaistoep: rear end from above, to show the “broad hips”

The description by de Meijere (1925a) of reptans probably refers to pseudoreptans.

Mandibles of equal size (i.e., not alternating), each with 2 teeth. Rear spiracula with some broad, flattened and fan-like split setae. The anterior arm of the cephalic skeleton is unicolorous brown-black (Dempewolf, 2001a).

Dempewolf (2001a) found that the specialised setae on the rear spiraclum not only occur in A. pseudoreptans, as was stated by Nowakowski (1964a), but also in the two other Agromyza’s on Nettle. (Perhaps they are easily lost during the making of a micriscopic preparation.)

18.xi.2007