6 EXPLANATION OF TERMS 



medium size, between teleodont and priodont ; = mesodont. 

 Amphipneustic: applied to larvx which have the spiracles confined to the 



anterior and terminal segments. 

 Ample: broad; large; sufficient in size. 

 Amplected: when the head is received into a concavity of the prothorax ; e. g. 



Histcr. 

 Ampliate-us: moderately dilated. 

 Amplificatus: dilated; enlarged. 

 Ampulla: Orthoptera; an extensile sac between head and prothorax used by 



the young in escaping from ootheca, and later, in molting: Heteroptera ; a 



blister-like enlargement at the middle of the anterior margin of the pro- 

 thorax. 

 Ampulla-like: flask-shaped : applied to a vascular sac at base of antenna which 



aids in the blood circulation of head and its appendages. 

 Amygdaliform: almond-shaped. 

 Anabolic: the constructive change from food material to animal tissue: see 



katabolic. 

 Anal: pertaining or attached to the last segment of the abdomen; the point or 



angle of any wing or other appendage that is near to or at any time reaches 



the tip of the abdomen. 

 Anal angle: on the secondaries Is that angle nearest the end of the abdomen 



when the wings are expanded : the angle between the inner and outer margin 



of any wing ; = hind angle of primaries. 

 Anal appendages: generally; applied to the external genital parts. 

 Anal area: Orthoptera and Neuroptcra ; the hinder or anal portion of a wing 



within the anal vein = axillary area. 

 Anal cells: the spaces between the anal veins (Comst.) : in Diptcra, anal 



cell (Will.), the space nearest the body, inclosed by the 5th and 6th veins; 



sometimes called the third basal cell (Coq.) = 1st anal (Comst.). 

 Anal field: Orthoptera; that area on the tegmina corresponding to the anal 



area of the secondaries. 

 Anal filaments: see caudal seta. 



Anal fork: applied to the cerci of Coleopterous larvse. 

 Anal foot: applied to the tip of the body in larval Chironomids, which is 



modified to serve as a hold-fast. 

 Anal furrow: in wings, lies between the cubitus and 1st anal vein. 

 Anal glands: appendages of the alimentary canal, opening into it near the 



posterior extremity, secreting either a lubricant, a silk-gum, or some other 



specialized material. 

 Anal horns: in Collembola, are small processes borne on the last abdominal 



segment. 

 Anal lobes: in Lecaniina, a pair of small, triangular, hinged processes forming 



a valve which covers the anal orifice. 

 Anal loop: Odonata; the loop formed by the angulations of tst anal vein. 

 Analogous: similar in function ; but differing in origin and structure: e. g., the 



wings of birds and insects: see homologous. 

 Anal operculum: the dorsal arch of the ioth abdominal segment; in cater- 

 pillars = supra-anal plate, q. v. 



