Key to the British Erotylidae

For more information on this family click HERE.

1.

Entire insect testaceous. Fourth tarsal segment distinct, not enclosed within the lobes of the third.

Cryptophilus integer

Colour variable but with the head and/or pronotum contrasting with the elytra in mature specimens. Fourth tarsal segment at least partly enclosed within the lobes of the third, least obviously so in Dacne.

Tritoma bipustulata

Anterior margins of the pronotum indistinct. Elytra almost quadrate (length along suture/maximum width.) Tarsi apparently 4 segmented; segment 4 mostly hidden under the bilobed 3rd segment.

2.
 

Anterior margins of the pronotum distinct. Elytra elongate; at least 1.2X longer than broad. Tarsi variable.

3.

Antennal club compact and well demarked. Elytral humerus pale. Tarsal segments not bilobed.

 

Antennal club loose and gradually thickened. Elytra unicolorous. Tarsal segment 3 deeply bilobed, segment 4 small but obvious at 30X.

Head and pronotum pale. [Explanate margin of pronotum broader and more evenly curved to base, but this varies] 2.5-3.3 mm.

4.
Dacne bipustulata
 

Head and pronotum dark (in mature specimens.)[Explanate margin of pronotum narrower and slightly sinuate behind the middle. This varies] 2.2-3.0mm.

Dacne rufifrons
Triplax aenea
5.

Elytra metallic blue. (Antennae black. Base of pronotum distinctly bordered.)

 

Elytra black.

Hind margin of pronotum not bordered. Antennae black with segments 1-4 and 11 paler. (Abdomen red.) 4-5.5mm.

6.
Triplax scutellaris
 

Hind margin of pronotum bordered. Antennae black or indistinctly paler towards base.

Triplax russica
7.

Head red. Abdomen red. 4.5-7mm.

Head dark. Abdomen black. 2.7-4.5mm.

Triplax lacordairii