USED IN ENTOMOLOGY. 15 



Femur, the thigh, or third joint of the feet. 



Fenestrate, applied to the naked hyaline spots on the wings of 



many of the Lepidoptera. 



Ferruginous, the colour of the oxide of iron ; brown approach- 

 ing yellow. 

 Filate, (antennae) simple, without a lateral hair or dilatation ; 



this word is used in the order Diptera. 

 Filiform, thread-shaped ; slender and of equal thickness. See 



setaceous, clavate. 



Pilose, ending in a thread-like process. 

 Fimbria, thick ciliated hairs at the termination of the abdomen ; 



conspicuous in the genus Andrena. See scopa, flocculus. 

 Fimbriated, fringed. 



Fissile, cloven ; divided into parallel lamellae, as in the antennas 

 of Scarabaeus, and the wings of the Alucitadae. See lamellate. 

 Fissure, a crevice ; a narrow solution of continuity. 

 Fistular, hollow ; applied to a hollow cylinder. 

 Flabelliform, fan-shaped. 

 Flaccid, limber; feeble; lax. 

 Flagellum, the terminal portion of the antennae situated beyond 



the pedicellus ; the apex. 

 Flavo-virens, green verging upon yellow. 

 Flexuous, zig-zag without acute angles; seems to differ from 



undulated in being alternately bent and nearly straight. 

 Flocculus, a hairy or bristly appendage of the posterior apophysis 



in a few of the Hymenoptera. Seejimbria. 

 Fluviatile, inhabiting rivers, as the larvae of many insects. 

 Foliaceous, resembling a leaf. 



Follicle, a cocoon; the covering formed by the larva for protec- 

 tion in its pupa state. 



Forceps, two or more hooks or processes, sometimes branched 

 on the inner side, with which the male grasps the anus of the 

 female ; they constitute a part of the penis. 

 Forcipated, formed somewhat like a pair of pincers. 

 Fornicate, arched or vaulted. 

 Fossula, a sinus : a small hollow ; foveola and scrobiculus have 



nearly the same meaning. 



Foveolate, covered superficially with cavities like a honeycomb. 

 Fragile, brittle, easily broken. 



Front, anterior portion of the head, included by the eyes, vertex, 

 and nasus, and supporting the antennas; (Diptera) that portion 

 of the head which is above the antennae and between the eyes, 

 its superior portion is called the vertex. 



