Squama: in Odonata, the sclerite that bears the palpus of both maxilla and labium: the scale-like first abdominal segment of some ants: a scale-like appendage covering the base of primaries in Lepidoptera, and so = patagium; q.v.: a small scale above the halteres in Diptera: in this order Packard uses squama for the lobed scale and restricts alula to the lobe-like appendage: Osten-Sacken uses squama for the posterior scale alone and antisquama for the anterior. Squames: the flattened, fimbriated or spine-like marginal processes of the pygidium in Diaspinae, other than the lobes and true spines: = "plates," of Comst.; or "scaly hairs" of Maskell. Squamiform: having a scale-like form. Squamose -ous: scaly or covered with scales. Squamula: a small corneous scale covering the base of primaries in some insects: = tegula, q.v.: in Diptera, = alula. Squarrous: scurfy: clothed with rough scales differing in direction, standing upright, or not parallel to the surface. Stadium -ia: the interval between the molts of larvae:= instar q.v.: any one period in the development of an insect. Stage: refers to the period of development; e.g. larval, pupal, etc. Stalked bodies: = gyri cerebrales; q.v. Stellate: star-shaped; with four or five radiating lines. Stelocyttares: social wasps in which the comb layers of the nest are supported by pillars and not connected with the envelope: see poecilocyttares and phragmocyttares. Stemapoda: the modified filamentous anal legs of Cerura and other Notodontid larvae. Stemmata: simple eyes or ocelli; q.v. Stem-mother: in plant lice; that form hatching from the winter egg, which starts a series of agamic summer generations. Stenocephalous: with a narrow, elongate head. Stenorhynchan: narrow beaked or snouted. Stenothorax: a supposed ring between pro- and meso-thorax. Stercoral: relating or pertaining to excrement. Sterile: not capable of reproducing its kind. Sternal orifice: in Perlids; a peculiar slit on each side of the sternum, extending inward and ending blindly := furcal orifice. Sternal spatula: = breast-bone; q.v. Sternauli: the short and often obsolete furrows on either side of the mesosternum in Hymenoptera. Sternellum: the second sclerite of the ventral part of each thoracic segment frequently divided into longitudinal parts which may be widely separated. Sternite: the ventral piece in a ring or segment. Sternopleura: in Diptera, the lower part of the pleura, below the sternopleural suture and above the front coxa. Sternopleural bristles: in Diptera, are situated on the sternopleura below the sternopleural suture. Sternopleural suture: in Diptera, is below and nearly parallel with dorso-pleural suture, separating the mesopleura from the sternopleura. Sterno-rhabdite: a sternal rhabdite. Sternorhynchi: that series of Homoptera in which the beak or rostrum apparently arises from the sternum between the anterior coxae; e.g. plant lice, etc.