Free: unrestricted in movement: not firmly joined with or united to any other part: said of pupae when all the parts and appendages are separately encased as in Coleopteran.
Frenatae: that series of Lepidoptera in which a more or less well- marked frenulum occurs.
Frenate: having a frenulum.
Frenulum: the spine, simple in males, compound in females, arising from the base of secondaries in many Lepidoptera, whose function it is to unite the wings in flight: in Cicada the triangular lateral piece on the mesonotum which connects with the trochlea: the anal area of secondaries and thus = tendo, q.v.
Frenulum hook: in the males of frenate Lepidoptera, a hook or fold into which the frenulum is fitted.
Frenum: that which holds things together: a lunate or triangular portion at the inner and hinder base of the wing in Odonata and Trichoptera; see tendo.
Fringe -es: an edging of hair, scales or other processes extending well beyond the margin and usually of even length: in Lepidoptera, fringes occur on the outer margins of all wings and consist of scales or hair projecting beyond the wing membrane.
Frog: the articular pan, - q.v.
Frons: = front; q.v.
Front: the anterior portion of head between base of antennae and below ocelli: in Homoptera, the vertical median area of face.