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This presentation will cover three aspects of chemoreception in the German cockroach.The first system involves a volatile sex pheromone emitted by the female cockroach and detected by the males olfactory system.A secretory gland in the females pygidium produces a volatile chemical that attracts males from a distance; females and nymphs are not attracted to extracts of this gland.The coupled gas-chromatographic electroantennogram detection technique (GC-EAD) was used in combination with a highly efficient preparative GC technique to obtain small amounts of pure sample for NMR analysis.A key feature of the identification of this pheromone, as well as the pheromone of the cockroach Parcoblatta lata, is the highly efficient sample preparation for NMR analysis.