During winter, cave cricket larvae undergo dormancy in subterranean habitats; this dormancy is termed diapause in second year Troglophilus cavicola larvae because they mature during this time, and termed quiescence in T. neglectus, because they mature after dormancy. Here we used electron microscopy to analyze ultrastructural changes in the epithelial cells in the Malpighian tubules (MTs) of T....

Male crickets and their close relatives bush-crickets (Gryllidae Tettigoniidae, respectively; Orthoptera Ensifera) attract distant females by producing loud calling songs. In both families, sound is produced stridulation, the rubbing together of forewings, whereby plectrum one wing rapidly passed over a serrated file on opposite wing. The resulting oscillations are amplified resonating regions....

The mode of growth of several tissues in Gryllus bimaculatus was investigated during postembryonic development by cytophotometric methods. In contrast to the situation in holometabolous insects, the tissues growing by endomitosis reach only moderate levels of polyploidy. In this case the growth of tissues is achieved by mitotic divisions of small cells with subsequent polyploidization. The time...

In female adults of Gryllus bimaculatus, ovaries as well as the abdominal integument pro­ duce free and conjugated ecdysteroids in vitro (Hoffmann et al., 1992). The aim of the current study was to determine the influence of various potential ecdysteroid biosynthesis effectors (RH 5849, KK 42, diflubenzuron, ketoconazole, azadirachtin, acetylenic and allenic cholesteryl derivatives B l, B6, AL2...