Key to female Smicromyrme of the Iberian Peninsula

(unknown for S. ferdinandi, S. matritensis, S. merceti, S. metanotalis and S. opistomelas; not confirmed for S. suberratus)

1. T5 with full band of pale pubescence. [Scutellar scale large and elongate (ca. 2 × broader than long), shaped as a dorsally arcuate trapezium, with well formed convergent sides and apically truncate; this structure is approached only by some specimens of S. sulcisius Invrea].................................................. S. ceballosi Suárez, 1959 (subgenus unknown)

- T5 with mostly black pubescence. [Scutellar scale different, with no elongated sides formed (if scutellar scale similar, metasomal pattern different)]..................................................................................... 2

2. Pronotum not darkened (exceptionally, weakly darker brownish anteriorly, never black). [T2 without basolateral spots of pale pubescence (only sparse setae present at most)]............................................................. 3

- Pronotum with black transverse band. [T2 with or without basolateral spots of pale pubescence]....................... 4

3. Pygidium with striae subparallel to the longitudinal axis. Scutellar scale relatively broad (e.g. ca. one sixth of mesosoma width; Petersen 1988). Dorsum of mesosoma sub-horizontal (lateral view). T2 with apical band of pale pubescence uniformly narrow. Vertex without pale recumbent pubescence...................................................................................................‘complex S. (Smicromyrme) rufipes ’ [sensu Schmid-Egger & Schmidt 2021, 2022] 1

- Pygidium with divergent striae. Scutellar scale relatively narrow (e.g. ca. one eighth of mesosoma width; Petersen 1988). Dorsum of mesosoma angled towards scutellar scale (lateral view). T2 with apical band of pale pubescence medially broader. Vertex with pale recumbent pubescence.............. S. (Smicromyrme) ruficollis (Fabricius, 1793) [sensu Petersen 1988]

4. Scutellar scale narrow, small and inconspicuous. [Head strongly developed behind the eyes. Pygidium basally widened, oval. Clypeus with subapical tubercle on each anterolateral corner of lower half. Pronotum with narrow contrasting black band medially. Mesosoma subtrapezoidal. Mandible robust, not elongate, with distal element convex]...................................................................................... S. (Erimyrme) plantourianus Schwartz, 1986

- Scutellar scale arcuate, distinctly broad, large and conspicuous................................................. 5

5. Mandible with distal element straight and elongate; basal groove and inner basal ridge approximately straight. Mesosoma elongate, trapezoidal; dorsum slanted towards scutellar scale (lateral view). T2 with medially enlarged apical band and T3 with full band of pale pubescence, both continuous. T2 laterally with or without well defined spots of pale pubescence................................................................................ S. (Eremotilla) sulcisius Invrea, 1955

- Mandible with distal element convex; basal groove and inner basal ridge notably curved inwards. Mesosoma not elongate, subtrapezoidal to parallel sided; dorsum sub-horizontal (lateral view). T2 with apical band and T3 with full band of pale pubescence, both medially fully interrupted by black pubescence. T2 laterally with well defined spots of pale pubescence.................................. S. (Erimyrme) partitus (Klug, 1835) and S. (Erimyrme) fasciaticollis (Spinola, 1843) [females of both species currently not clearly distinguishable]