USED IN ENTOMOLOGY. 49 



vertex ; usually applied to insects in which the head is vertical : in bees 

 extends between the eyes to the base of the antennae ; in the Hymenoptera 

 generally the area between antennae and clypeus : in flies the area between 

 base of antennae, the oral margin, eyes and cheeks. 



Facet: a small face or surface: one of the parts, areas or lens-like divisions 

 of the compound eye. 



Facial angle: the angle formed by the junction of the face and vertex. 



Facial bristles: Dipt era; a series on either side of the middle portion of the 

 face, above the vibrissae, along the facialia. 



Facial carinae: applied to both the carinse of the frontal costa and the ac- 

 cessory (lateral) carinae of the face; but usually restricted to the accessory 

 carinae, in Orthoptefa. 



Facial depression: = antennal fovea, q. v. 



Facialium -ia: Dipt era; that portion of the face between the lower part of 

 the frontal fissure and the antennal foveae. 



Facial quadrangle: in bees, the quadrangle bounded laterally by the eyes, 

 above by a line between their summits and below by a similar line between 

 their lowest points. 



Facial ridges: Dipt era; the elevated lateral borders of antennal grooves. 



Facial tubercle: Diptcra; a median convexity below middle of face. 



Facies: the face: the general appearance or impression. 



Falcate: sickle-shaped; convexly curved: a wing when deeply excavated be- 

 low the apex so as to leave the latter acute and a little curved. 



Falciform: curved like a sickle. 



False legs: = spurious legs; = prolegs ; q. v. 



Family: a division of classification including a number of genera agreeing 

 in one or a set of characters and so closely related that they are apparently 

 descended from one stem : opinionative and indicated by the termination 

 idee. 



Farctus: fully filled. 



Farinaceous: mealy: applied to powdery looking wings and surfaces. 



Farinose : dotted with many single, flour-like spots : mealy. 



Fascia: a transverse band or broad line; it is common when it crosses both 

 wings or wing covers. 



Fasciate: banded transversely. 



Fascicle -ulus: a bundle of .hair, threads or fibres. 



Fasciculate: bundled; clustered as in a bundle; tufted: a surface when 

 covered with bundles of long hair. 



Fastigiate: flat-topped and of equal height: also applied to elytra that extend 

 a little beyond the abdomen. 



Fastigium: Orthoptera; the extreme point or front of vertex. 



Fat-body: is the mass of oil or fat cells found, especially in larvae, sur- 

 rounding the alimentary canal and some other internal organs. 



Fatiscent: with cracks, crevices or openings. 



Fauna: the assemblage of animals inhabiting a region or country. 



Favose: with large deep holes, like the cells of a honeycomb. 



Favus: a cell like that of a honeycomb. 



Fecula: the excrement of insects. 



