The Taiwan giant cricket Brachytrnpes portentosus Lichtenstein is spread widely in the middle and southern parts of Taiwan. They are easily found in sandy soil where plants grow exuberantly. During laboratory rearing, it is observed that the avarage developmental duration of Taiwan giant crickets from eggs to adults stages take approximately six to eight months to complete the cycle and their body lengths are measured during each developmental process. The cricket has eight instar stages and there is no diapause in its life cycle.