AMERICAN ENTOMOLOGY. 137 



Fornicate, arched or vaulted. 



Fossula, a sinus ; a small hollow ; foveola and scrohiculics 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 nasiis, and supporting the antennse ; (Diptera) that portion 



of the head which is above the antenn36 and between the eyes, 



its superior portion is called the vertex. 

 Fulcrum, the corneous body on which the base of the tubus, or 



sheath of the tongue, in the Hymenoptera, rests ; it is " le 



pivot" of Keaumer. 

 Fuliginous, sooty j of the color of soot. 

 Fulvous, orange-yellow. 



Furcated, forked ; terminating in two divisions. 

 Fuscus, dark brown, with a slight mixture of gray. 

 Fusiform, spindle-shaped; gradually tapering more or less to 



each end. 



G. 

 Galea, helmet ; a dilated inarticulate membranaceous piece on 



each maxilla, that, together with the lahrum, covers the 



organs of the mouth in the Orthoptera and some of the Neu- 



roptera. 

 Gastric, of or belonging to the belly. 

 Gelatinoits, jelly-like; having the consistence of jelly. 

 Geminate, situated in pairs. 

 Gena, cheek ; a portion of the head on each side immediately 



beneath the eye, often turgid. 

 Geniculate, knee-jointed ; bending abruptly In an obtuse angle. 

 Genus, an assemblage of sjiecies which correspond in particular 



characters. 

 Geomctrse, larvae which when walking, alternately elevate and 



straighten the middle of the body, as in those of the genus 



Geometra; opposed to rectigrade. 

 Gibbous, hump-backed; protuberant. 

 Glabrous, smooth ; opposed to liaii'y, downy, villous, &c. 

 Glaucous, gray-bluish-green. 



Globular, like a round ball ; all the diameters equal. 

 Glochis, a barbed point. 



