nnae and meeting or nearly meeting the
fastigium of the vertex in Tettigidae.

Frontal fissure: Diptera; the impressed line extending from the frontal
lunule to the border of the mouth.

Frontal lobes: in Psyllidae, two lobes or swellings more or less
completely divided by a suture in which an ocellus is situated.

Frontal lunule: Diptera; an oval or crescentic space above the base of
antennae in Cyclorrhapha, bounded by the frontal suture.

Frontal processes: Diptera; = antennal process, q.v.

Frontal ridge: in Coleopteran; a sharp ridge on the dorsal margin of
the eye, extending forward.

Frontal stripe: Diptera; the middle of the front when membranous or
discolored: = vitta frontalis.

Frontal suture: Diptera; separates the frontal lunule from that part of
the head above it: in Coleopteran; = clypeal suture.

Frontal tubercles: in certain Aphids, are raised structures upon which
the antennae are placed.

Frontal triangle: Diptera; the triangular space in males, between the
eyes below, limited by a line drawn through base of antennae.

Frontal vesicle: in Odonata; that elevated area on the vertex upon
which the ocelli are situated.

Fronto-orbital bristles: in Diptera; are placed on each side of the front,
just below the vertical bristles.

Fugitive: soon disappearing; not permanent.

Fulcrant: the trochanter when continued along the femur, as in
Carabids.

Fulcrum: the chitinous envelope at the base of mouth in Diptera and
Hymenoptera, covering the beginning of the oesophagus: any
structure that serves as a support to another..

Fulgidus: shining.

Fuliginous -osus: sooty or smoky brown
[Van Dyke brown + a little black].

Fulvo-aeneous: brazen, with a touch of brownish yellow [brown pink].

Fulvous -us: tawny; light brown with much yellow; nearly orange
[pale cadmium yellow + Indian red].

Fumate -us: smoky gray [gray].

Fumose: smoky.

Function: the work or duty which a given part or organ normally
performs.

Fungicolous: living in or on fungi.

Funicle: the joints between the scape and club in Funiculate
antennae: a small cord: a slender stalk.

Funiculate: whip-like: long, slender, composed of many flexible joints.

Funicule: a small, cord-like structure; especially when sheathed.

Funiculus: the main tendon of abdomen: in Hymenoptera a slender
ligament connecting the propodeum to petiole on its dorsal aspect.

Furca: a fork: the anal appendage used for leaping in Thysanura; s