Statement of the Problem. The purpose of this study was (1) to determine some of the insects associated with the California juniper (Juniperus californica); (2) to define established relationships between the host plant and its insect fauna; and (3) to describe any existing, unique adaptations of the insect inhabitants to their existence on juniper. Importance of the Study. California juniper was selected as the particular host plant for this study because of the uniqueness of its ecologic position. It is native to regions where life is in constant struggle with a basically adverse environment. Few areas can match the adaptive variability of all living things that exist. on the hot, dry semi- desert where juniper grows most abundantly. In itself, the California juniper tends to isolato its insect fauna since it is the only conifer occurring in typical flora of the region; its vertical distribution isolates it from other members of the genus Juniperus and its horizontal distribution allows only a slight overlapping with other species.
