Nemotelus

Kahanpää, Jere, 2010, Finnish species of Nemotelus (Diptera: Stratiomyidae), with description of a new species, Zootaxa 2401, pp. 30-40 : 40

Key to the North European Nemotelus species (including N. brevirostris which may occur in the area)

1 Abdomen completely black. Wing vein R4+5 simple......................................................................... N. nigrinus Fallén

- Abdominal tergites with pale bands or spots. Wing vein R4+5 apically forked (i.e. R4 and R5 reach the wing margin independently) .............................................................................................................................................................. 2

2 Postpronotum partially black, white colour restricted to a spot on the posterolateral corner...................................... 3

- Postpronotum white ..................................................................................................................................................... 4

3 Tip of rostrum downturned. Fore and mid tibiae considerably darkened, only base and apex clear yellow. 3: sternites black. Ƥ: frons with two yellow triangular spots...................................................................... N. infortunatus sp. nov.

- Tip of rostrum triangular, not downturned. Fore and mid tibiae yellow or with a narrow brown ring at middle. 3: sternites yellow. Ƥ: frons with two lines of silvery microtrichiae in place of yellow spots ........... N. pantherinus (L.)

4 Rostrum long, tip downturned, without long silvery hairs. 3: lower frons (wide section above antennal base) yellow. Ƥ: frons usually with elongated bar-shaped spots ............................................................................ N. uliginosus (L.)

- Rostrum short, tip not townturned. 3: lower frons usually with a smaller yellow spot or spots, leaving a well-defined black band above the antennal bases. Ƥ: frons usually with smaller, short-triangular spots ....................................... 5

5 Minimum width of gena (in ventral view) clearly smaller than the length of rostrum in profile. Base of rostrum with conspicuously silvery hairs. 3: Eyes close-set, separated by less than the width of the anterior ocellus. Eyes with large dorsal and small ventral facets. Ƥ: abdominal tergites 2–5 with yellow spots on posterolateral corners.............. ........................................................................................................................................................... N. notatus (Zett.)

- Minimum width of gena (in ventral view) equals the length of rostrum in profile. Rostrum without conspicuously silvery hairs. 3: eyes separated by more than the width of the anterior ocellus. Eye facets of uniform size. Ƥ: posterolateral corners of tergites dark, only lateral margins yellow ...................................................... N. brevirostris Meig.