Oecobiidae

In this family the cephalothorax is broader than long, and the eyes are grouped in the center. The eyes are unequal in size, shape, and color; some are opaque white and some are elongate and angular. The anal tubercle has a long fringe of setae. In Oecobius the cephalothorax is convex and moderately elevated. The family Urocteidae of the Old World is sometimes placed within this family, and the genus Uroctea is included here.

Oecobius parietalis (Fig. 18.7f) Males are about 2 mm long and females about 2.5 mm long. The cephalothorax is pale yellow with a marginal black line and some dark spots. The abdomen is brownish white or light brown with many dark markings; the venter is pale brown. This species constructs

Figure 18.7 Arthropoda: Aranea. (a) Lycosa carolinensis; (b) Mime-tus epeiroides; (c) Loxoceles reclusa; male, female above; (d) Physocy-clus globosus; (e) Pholcus phalangiodes; (f) Oecobius parietalis; (g) Sper-matophora meridionalis.

small flat webs on windowsills, and over the cracks in walls of buildings. It occurs in the USA, from New England south to Florida and west to California.

Uroctea compactilis Males and females are 8-10 mm long. The cephalothorax and legs are light brown to brown. The abdomen is grayish brown and has white markings at the base and laterally. This species builds dense sheet webs on flat surfaces and in corners indoors. It occurs in Japan.

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