semicircle, to one side of the female, or may be in an S-shaped loop, depending on whether or not the hemipenis employed is on the side opposite to that on which the female is grasped. Only one hemipenis is inserted, but occasionally the other may be everted also. As copulation begins the male's hind leg, flexed over the female's tail base quivers, but otherwise there is hardly any movement during approximately the first one-third of the copulatory period, and this phase may last for from one to three minutes. Then, abruptly, the male begins rhythmic, jerky flexions of the proximal portion of the tail, at the rate of approximately one per second. These tail movements are in a dorsoventral plane, and there is no perceptible movement of the body. Shortly after these movements cease, contact is broken usually at the initiative of the female, as she suddenly struggles to escape and is released either immediately or after a few seconds by the male. She then moves away, pressing her cloacal region against the ground. Her movements have become unhurried, with little or no attempt to avoid the male's attention. The male usually follows, either close behind, or straddling the female's tail or body. He may nip at her tail or body repeatedly, but without securing a grip. When the female pauses, he may come to rest with his chin or forequarters resting on her. Usually the association does not last more than a few minutes. PLATE 1 [Illustration: FIG. 1. Habitat of _Eumeces fasciatus_ near the center of the "Skink Woods" study area on the University of Kansas Natural History Reservation, a glade with loose rocks that were used as nesting sites and shelter by many five-lined skinks.] [Illustration: FIG. 2. A log on rocky slope in open woods with sparse undergrowth, fifty feet from center of glade shown in Fig. 1. The trees are mostly oaks (_Quercus Muehlenbergii_). The decaying log in middle foreground is much frequented by the skinks as a shelter and source of insect food.] PLATE 2 [Illustration: FIG. 1. Old adult male, year-old young and hatchling in July, showing differences in size and pattern.] [Illustration: FIG. 2. Adult female skink in a natural nest, with her clutch of eggs late in incubation. The nest cavity is excavated in loose soil beneath a flat rock, which was raised momentarily to expose the nest to view.] [Illustration: FIG. 3. The same female and nest, with eggs in process of hatching.]