In Germany, the dusky cockroach (Ectobius lapponicus [Linne, 1758]) lives i
n woodland. Dwelling of these insects which are not considered a pest, in b
uildings is an extremely rare observation. In early summer of 2000, several
areas of a forest hospital were found to be infested with Ectobius lapponi
cus. In contrast, the German cockroach (Blattella germanica [Linne, 1767])
had not been found in that hospital for years. In the light of the literatu
re available, an attempt is made to provide a survey of infestation of buil
dings with the dusky cockroach.