Part 139

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.

Sternum -a: the breast: the middle portion of the under surface of thorax, between the coxal cavities.

Stethidium: the trunk: the entire thorax with all its appendages.

Stigma: a spiracle or breathing pore: a dense, often discolored portion of the costal margin of a wing, usually at the end of the radius; see anastomosis: in Diptera, a colored wing spot near the tip of the auxiliary vein: in Lepidoptera, the specialized patch of black scales on the primaries of Hesperidae.