USED IN ENTOMOLOGY. 57 



Genu: knee: the joint between femur and tibia. 



Genus: an assemblage of species agreeing in some one character or series of 



characters : usually considered as arbitrary and opinionative, though some 



consider it a natural assemblage. 

 Geometrid: larvic which, when walking, alternately elevate and straighten the 



middle of their body : opposed to rectigrade : q. v. 

 Geodephagous: r— adephagous : q. v. 



Geodromica: terrestrial Hcteroptera in which the antennre are not concealed. 

 Geophilous: living on the ground: species that live on the surface or come 



freely into contact with it. 

 Germarium: an ovary: that portion of an ovarian tube containing the cell 



elements. 

 Germ-ball: reproductive cells in larvae from which, exceptionally, young may 



de\eloii as buds. 

 Germ-band or Germinal band: that portion of a young embryo which is to 



become the future insect, when it is in the form of a band or strap and 



may or may not show the division into the future segments. 

 Gerontogeic: belonging to the old world: see neogeic. 

 Gibba: a rounded protuberance or prominence. 

 Gibbous: hump-backed: protuberant: said of a macula when it resembles a 



moon more than half full. 

 Gibbus: when the whole surface forms a hump or obtuse cone. 

 Gills: respiratory structures which function in water: distinguished as true 



or blood gills where contained blood conveys the absorbed oxygen from the 



gill to the tissues, and as tracheal gills when this conveyance is by contained 



tracheae. 

 Gilvus: =:: flavus ; q. v. 



Ginglymus: a hinge joint that permits flexion in one plane. 

 Gizzard: a pouch-like structure between the crop and chylific ventricle fur- 

 nished with chitinous teeth or plates, in which the food is prepared for the 



digestive juices by grinding or merely sifting ^ cardia. 

 Glaber-rous: smooth: free from all vestiture. 

 Gland: a cellular sac which separates or secretes from the blood specific 



portions to produce characteristic products — e. g., wax, saliva, silk, etc. 

 Gland-bearing prominence: in Diaspince, a prominence on the margin, bear- 

 ing a gland opening on the dorsal surface. 

 Gland orifice: in Coccidcc. the external opening through which a gland pours 



its secretions. 

 Gland spines: in Coccidcc: spiny appendages, each of which is supplied with 



a sitiLile gland whose opening is at the tip. 

 Glandular: having the character or function of a gland: used as descriptive 



of specialized hairs, spines or other processes. 

 Glassy: transparent; glass-like in appearance. 



Glaucus: shining sea-green: whitish blue inclining to gray lavender. 

 Globose: formed like a globe or sphere. 



Globulin; an alhumenoid protcid compound formed in the blood of insects. 

 Glochis: a barbed point. 



