A EXPLANATION OF TERMS 



Afternose: a triangular piece below antenna; and above clypeus : see post- 



clypeus. 

 Agamic -ous: reproducing without union with a male. 



Agamogenesis: reproduction without fertilization by a male: see partheno- 

 genesis ; gamogenesis. 

 Agglomerate: heaped or massed together. 



Agglutinate: stuck or glued together; welded into one mass. 

 Aggregated: crowded together as closely as possible. 

 Agnathous: without jaws; specifically applied to those Neuropteroid series in 



which the mouth structures are obsolescent. 

 Aileron: the scale covering the base of primaries in some insects; see tegulae ; 



in Diptera = alula and squama, q. v. 

 Air-sacs or vesicles: pouch-like expansions of tracheal tubes in heavy insects, 



capable of inflation and supposed to lessen specific gravity. 

 Air-tube: a respiratory siphon. 

 Ala -ae: a wing or wings. 

 Alar appendage: see alulet. 

 Alar frenum: a small ligament crossing the supra-alar groove toward the root 



of the wing : Hymcnoptera. 

 Alary: relating to the wings: applied also to the wing muscles of heart. 

 Alate-us: winged; with lobes similar to wings in appearance though not neces 



sarily in function. 

 Albi, albus: white. 

 Albicans: formed or made of white. 

 Albidus: white with dusky tinge. 

 Albinic: of the character of an albino. 

 Albinism: that condition in which there is an absence of color or a whitening 



in a form usually colored. 

 Albino: a colorless individual of a species that is normally colored. 

 Albumen: the white of egg or the substances in the tissues which have the 



same characteristics. 

 Albumin: the characteristic substance forming the white of egg. 

 Albuminoid: like or of the character of albumen. 

 Alimentary canal: the digestive tract as a whole; begins at the mouth and 



extends through the body to the anus. 

 Alitrunk: that part of the thorax to which the wings are attached: in many 



Hymcnoptera, includes the ist abdominal segment. 

 Alizarine: a transparent, orange red [alizar crimson]. 

 AUeghanian faunal area: is that part of the transition zone comprising the 



greater part of New England, s. e. Ontario, New York, Pennsylvania, Michi- 

 gan, Wisconsin, Minnesota, eastern N. Dakota, n. e. S. Dakota, and the 



Alleghanies from Pennsylvania to Georgia. 

 AUigate-US: fastened or suspended by a thread; like the chrysalis of Papilio, 



etc. 

 Alliogenesis: when the development includes an alternation of generations 



(q. v.), as in Cynipids. 

 Alluring glands: glandular structures diffusing an odor supposed to be at- 



tracti\c to the )iii)0site sex. 



