Part 60

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 .

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; see furcula: the forked ental processes of the sternum.

Furcal orifice: see sternal into orifice.

Furcate: forked; divided nto two approximately equal divisions.

Furcula: a forked process: an osmaterium {Scanner's comment: sic. See comment under "osmaterium".}: in Collembola the spring or saltatory appendage borne by the fourth abdominal segment: in Orthoptera, a pair of backwardly directed appendages which overlie in a more or less forked position the base of the supra-anal plate.

Furred: covered with dense hair resembling fur.

Fuscescent: becoming brown; with a brown shading.

Fusco-ferruginous: brownish rust red.

Fuseo-piceous: pitch black with a brown tinge or admixture.

Fuseo-rufous: red-brown, approaching liver brown.