a; starts from beneath base of front wing
behind humeral suture and meets it behind second coxa.

First longitudinal vein: in Diptera; - radius 1 (Comst.).

First submarginal cross-nervure: Hymenoptera; part of the media and
the radio-medial cross vein (Comst.).

Fissate: divided or split: with fissures or cracks.

Fissile -is: cleft or divided; as the wings in plume-moths: also used
for lamellate.

Fissiparous: applied to that form of asexual generation in which the
parent divides; each part becoming a new individual.

Fissure: a crevice: a narrow longitudinal opening: a slit.

Fissus: cleft: longitudinally divided nearly to base.

Fistula: a slender tube: specifically applied to the channel formed by
the union of the two parts of proboscis in Lepidoptera.

Fistular: like a slender, cylindrical tube.

Flabellate: with long flat processes folding like a fan.

Flabelliform: fan-shaped.

Flabellum: a fan: a leafed structure: the transparent lobe at the end of
the glossa in bees: also used as = flagellum; q.v.

Flabs: the lobes at the tip of the dipterous mouth:= labella; q.v.

Flaccid: feeble: limber: lax.

Flagelliform: whip-like; applied to a process.

Flagellum: that part of the antenna beyond the pedicel: a whip or
whip-like process: the tail-like process of a spermatozooen.

Flammate -eus: flaming or fiery red [vermilion intensified].

Flange: a projecting rim or edge.

Flank: the sides of the thorax: the pleura.

Flaring: widening out like the mouth of a trumpet.

Flavescent: somewhat yellow.

Flavid: yellowed: sulphur yellow.

Flavo-testaceous: light yellow-brown: almost luteous.

Flavous -us: sulphur yellow [gamboge].

Flavo-vixens: green verging upon yellow [apple green + chrome yellow].

Flex: to bend: to curve back.

Flexible: pliable; with elastic properties.

Flexile -is: capable of being bent at an angle without breaking:
flexible.

Flexuous -ose: almost zig-zag, without acute angles but more acute at
angles than undulating: differs from sinuate in being alternately bent
and nearly straight.

Flexor: that which bends; applied to muscles.

Flocculus -i: a hairy or bristly appendage on the posterior coxa of
some Hymenoptera.

Floccus: a tuft of wool or wool-like hair.

Flosculiferous: species that bear a flosculus.

Flosculus: a small, tubular lunulate anal organ with a central style, in
certain Fulgorids.

Fluviatile: inhabiting the margins of running streams.

F