Beetle larvae
-Rough woodlouse-

Last update: 27 March 2020
OBSERVATION:
2015-XII-092015-XI-08

On November 8 2015 I found these two monsters underneath a large piece of bark on the garden tiles.

Stinkende kortschildkever (Ocypus olens), larve 1
Devil’s coach-horse beetle (Ocypus olens), larva 1
Stinkende kortschildkever (Ocypus olens), larve 2
Devil’s coach-horse beetle (Ocypus olens), larva 2

They are larvae of the Devil’s coach-horse beetle, the largest rove beetle (STAPHYLINIDAE) in the Netherlands. The adult shown on the picture below I had found in the garden on August 30 and has been added to my gardeninsect collection. Judging by the flat and damaged state it looks like somebody has stood on it. It measures 2,5 cm in length.

Stinkende kortschildkever (Ocypus olens), imago
Devil’s coach-horse beetle (Ocypus olens), adult

Larva 1 is a monster of almost 3 cm with an impressive head bearing a set of equally impressive jaws.

Stinkende kortschildkever (Ocypus olens), larve 1
Devil’s coach-horse beetle (Ocypus olens), larva 1

Larva 2 was a little smaller version of 1,5 cm. Both sat next to each other underneath the bark and were accompanied by a large supply of wood lice…. which are Rough woodlice (Porcellio scaber).