Latticed: = cancellate; q.v.
Latus: the side: broad.
Latuscula: the facets of the compound eye.
Leathery: having the appearance or texture of leather.
Lectotype: a co-type chosen, subsequently to the original description, to take the place which in other cases a holotype occupies.
Leg -s: the jointed appendages attached to the thoracic segments, used in walking: the organs of locomotion other than wings: unjointed organs of locomotion are pro-legs or false legs; q.v.
Legion: a group of genera, subequal to a tribe.
Legnum: the margin of a squama.
Lemniscate: ribbon-like: in the form of an 8.
Lenticular: round, doubly convex; like a lens or lentil.