The arboreal camel cricket, Gammarotettix bilobatus Thomas, is abundant and widespread in California. It emerges in mid to late February, survives into late May and early June, and utilizes 8 host-plant species (coast live oak, barberry, Christmas berry, California lilac, California buckeye, Monterey pine, black locust, and California bay), some of which are toxic. It appears that G. bilobatus switches host plants intraseasonally and possibly acts as an inadvertent pollinator of some of its host plants.