Abstract
The specimens of Brachytrypes portentosus (Lichteinten) described on the basis of their sound producing structures i.e. tegmina, plectrum, stridulatory file and teeth for the first time in Pakistan. Specimens were collected from Quetta in Baluchistan was subjected to Scanning technique of Electron Microscopy following the techniques of David et al. (2003) to study these structures The pars stridulum pattern, the stridulatory file and the number of teeth on file appear as important characters to identify males of B. portentosus (Lichteinten) from other related taxa found in Pakistan.
