Key to the British Endomychidae
For more information on this family click HERE.
1.
Pronotum quadrate, sinuate and distinctly constricted before the base. (Antennae distinctly clubbed)
Pronotum transverse and rounded laterally or species ≥4mm.
2.
Antennae 11-segmented in both sexes.
Antennae 10-segmented in female, 9-segmented in male.
3.
Eyes tiny. 1.0-1.2mm.
Eyes occupying most of the lateral margin of the head. 1.3mm.
4.
Small species <2mm. Tarsi clearly 4-segmented.
Larger species ≥4mm. Tarsi apparently 3-segmented; the small third segment obscured by the lobes of the second.
5.
Pronotum less transverse and with a complete sub-lateral keel. 1.5-1.8mm.
Pronotum more transverse with a basal keel fading or absent around the middle. 1.9-2.1mm.
6.
Pronotum broadest at the base, antennomeres 9 and 10 elongate. Characteristically coloured red with distinct black marks.
Pronotum broadest in front of the middle, antennomeres 9 and 10 transverse.
7.
Entirely dark or with the appendages lighter. Elytra more acuminate apically and with a complete sutural stria. Male pro-tibia simple.
Red with a broad dark mark across the elytra. Elytra less acuminate apically and with the sutural stria fading towards the base. Male pro-tibia with a strong tooth on the inner margin.