Alluring glands: glandular structures diffusing an odor supposed to be attractive to the opposite sex.
Allux: next to the last joint of tarsus; in Rhynchophora.
Alpine zone: = arctic zone, q.v.
Alternation of generations: where a species that occurs in both sexes periodically produces only parthenogenetic females; the latter, in turn, producing the sexed form; occurs in Cynipidae and some Homoptera: see heterogeny.
Altus: above: applied to a part raised above the usual level.
Alulae: Diptera; a pair of membranous scales above the halteres, behind the root of the wing, one above or before the other; the anterior attached to the wing and moving with it, the posterior fastened to the thorax and stationary; see calyptra; squama; squamula; lobulus; axillary lobe; aileron; scale; tegulae: Coleoptera; a membranous appendage of the elytra which prevents dislocation.
Alulet: Diptera: the lobe at basal posterior part of wing; = alar appendage; posterior lobe: and has been used as = alula.
Alutaceous: rather pale leather brown [burnt sienna]: covered with minute cracks, like the human skin.
Alveolate: furnished with cells: deeply pitted.
Alveolus: a cell, like that of a honeycomb.