Key to the clavatus species group of Erythmelus (Erythmelus) of the world, females

1 F3 with 1 longitudinal sensillum ............................................................................................................................. 2

– F3 without longitudinal sensilla ............................................................................................................................... 4

2(1) F4 with 1 or 2 longitudinal sensilla .......................................................................................................................... 3

– F4 without longitudinal sensilla ............................................................................ E. (E.) yuzhanin Triapitsyn, sp. n.

3(2) F1 notably shorter and narrower than F2; forewing disc hyaline in the middle .............. E. (E.) logarzoi Triapitsyn

– F1 subequal to F2; forewing disc infuscate in the middle ....................................... E. (E.) podaypodnos Triapitsyn

4(1) Scape 3.3–4.1 x as long as wide, notably dilated in the middle .............................................................................. 5

– Scape 5.0–5.3 x as long as wide, at most slightly dilated in the middle................................................................... 6

5(4) Funicle relatively short, ratio of funicle length to clava length about 1.7:1 ..................... E. (E.) mudrila Triapitsyn

– Funicle relatively long, ratio of funicle length to clava length 2.1–2.2:1 ............................ E. (E.) burtik Triapitsyn

6(4) Forewing disc with setae mostly on the apical 1/3 ........................................................... E. (E.) clavatus Ogloblin

– Forewing disc more or less uniformly setose on the apical 1/2 .................................... E. (E.) kostjukovi Triapitsyn