Part 53

Expanse: the distance between the apices or other widest point of the wings when fully spread.

Expansio alarum: the wing stretch; see expanse.

Expiratory: relating to the act of expiration, when the abdomen is contracted and the air contained in the abdominal tracheae is presumably forced out of them.

Explanate: spread out and flattened; applied to a margin.

Explicate: unfolded; open; without folds or plica.

Exsculptate -tus: a surface with irregular, more or less longitudinal depressions, as if carved.

Exscutellate: having no scutel.

Exserted: protruded; projecting beyond the body or over a given point.

Exsertion: a protrusion: an extension of a line or other ornamentation beyond its ordinary course.

Extended: spread out: not lying one upon the other.

Extense: extended: expanded.

Extension plate: a structure at the base of the pulvillus whose function it is to extend it.

Extension sole: the pad-like pulvillus which may be extended by the extension plate through the pressure plate.

Extensor: that which extends or straightens out; applied to muscles.

Extenuate: to make or to become weak, thin or slender.

Exterior: the outside.

Exterior margin: the outer margin; sometimes used for costal margin.

External: belonging to or on the outside.

External area: Hymenoptera; the upper of the three cells or areas of the metanotum, between the median and lateral longitudinal carina, first lateral basal area.

External median area: Hymenoptera; the median of the three cells or areas between the median and lateral longitudinal carinae: = second lateral area.

Externomedial vein: in Hymenoptera (Norton) = radius (Comst.); in Orthoptera, = media (Comst.).

Externo-median nerve: the humeral and discoidal veins together.

Extra-ocular: remote from or beyond the eyes.

Extremity: the point most remote from base.

Extrorse -um: toward the outside.

Extrude: to turn or force out.

Exude: to ooze or flow slowly through minute openings.

Exuvia -iae -ium: the cast skin of a larval insect: in Diaspinae the larval skin when cast and incorporated in the scale.