Aphidilutein: a yellowish fluid found in plant lice, changed to a rich violet by alkaline reagents. Apical: at, near or pertaining to the apex; usually of a wing. Apical area: see petiolar area. Apical areas: apical cells in some Homoptera. Apical cell: a cell near or at the apex of a wing; in Hymenoptera (Norton) = medial (Comst.); outer apical cell = 2d medial 2 (Comst.); inner apical cell = medial 3 (Comst.). Apical cells or cellules: Trichoptera; the series of cells along the outer margin of wing from pterostigma to arculus. Apically: toward or directed toward the apex. Apical sector: one of the longitudinal veins in the apical part of wing of Neuroptera. Apical transverse carina: Hymenoptera; crosses the metanotum behind middle and separates the median from the posterior cells or areas. Apiculis: an erect, fleshy short point. Apiculate: covered with fleshy, short points. Apivorous: devouring bees. Apneustic: without an open tracheal system; respiration is through the skin or through tracheal gills. Apocrita: = petiolate, q.v. Apodal: with single, simple tubercles instead of feet, in larvae; without feet = apodous. Apode: one that has no feet. Apodema: a conspicuous transverse band crossing the thorax in front of the scutellum in male Coccidae. Apodeme: an inwardly directed process to which a muscle is attached. Apodous: without feet; see apodal. Apolar: without differentiated poles; without apparent radiating processes applied to cells. Apophysis: the lower of the two joints of trochanter in ditrocha trochanterellus; the dorso-lateral metathoracic spines in Hymenoptera; also used as synonymous with ento-thorax. Apophystegal plates: Orthoptera; flattened blade or plate-like sclerites covering the gonapophyses. Apotypes: = hypotypes; q.v. Appendage -es: any part, piece or organ attached by a joint to the body or to any other main structure. Appendice -es: any attached body or small process; an appendix. Appendicial: supplementary: relating to appendices. Appendicle: a small appendix: in some bees, a small sclerite at tip of labrum. Appendiculate: bearing appendages; said of antennae where the joints have articulated appendages; of tarsal claws that have membranous processes at base. Appendiculate cell: Hymenoptera; is on costa just beyond 2d radius 1 and 2. Appendigerous: bearing appendages. Appendix: a supplementary or additional piece or part, added to or attached to another: in Heteroptera; = cuneus, q.v. Appress -ed: to press against; closely applied to. Approximate: near to; applies to antennae inserted close together. Aptera: those that have no wings: an ordinal term formerly employed for fleas, lice and other wingless forms now distributed in other orders: later used for the simplest or lowest insects, including the Thysanura and Collembola. Apterodicera: wingless, with two antennae. Apterous: without wings.