MALDI-TOF mass spectra (neuropeptide mass fingerprints) from single thoracic PSO preparations of three Blaberus/Eublaberus species, representing FMRFamide related peptides which accumulate in the neurohaemal organs of insects (see Predel et al. 2004). The selected species were not distinguishable by screening the CAPA peptides from abdominal PSOs. All ion signals different from those of B. craniifer are marked. Such fingerprint data exist from all neurohaemal organs of all cockroach species investigated.