USED IN ENTOMOLOGY. 47 



Eutracheata: applied to articulates which, like the insects, have a well- 

 developed tracheal system. 



Evaginate: extruded by eversion : turned inside out when extruded. 



Evagination: an extrusion formed by eversion or turning inside out. 



Evanescent: disappearing; becoming gradually less. 



Eversible: capable of being turned inside out. 



Evident: easily seen or recognized. 



Ex: prefix =A and E as privatives : also means from or out of. 



Exarate-us: sulcated : sculptured. 



Exarticulate: without distinct joints. 



Exasperate -us: rough with irregular elevations. 



Excalcarate: without spurs. 



Excaudate: see ecaudate. 



Excavate: with a depression that is not the segment of a circle. 



Excentric: not in the centre; revolving or arranged about a point that is not 

 central. 



Excision: with a deep cut: a notch or other cut-out part. 



Excrementaceous -titious: made up of or resembling excrement. 



Excrescence: an outgrowth or elevation; usually abnormal. 



Excretion: the act of getting rid of waste products: any material or sub- 

 stance produced by any secretory glands or structures and which is voided 

 or otherwise sent out from them. 



Excretory: those structures concerned in ridding the body of waste products. 



Excurrent: attenuate, narrowly prolonged. 



Excurved: curved outwards. 



Ex larva: from or out of the larva: usually applied to specimens that have 

 been bred from collected larvae. 



Exochorion: that part of the chorion derived from the ectoderm: the outer 

 layer of the chorion. 



Exochorium: Heteroptera; a narrow marginal part of the hemelytra. 



Exoderm: the outer skin or crust. 



Exoloma: the apical margin of the wings. 



Exophytic: relating to the outside of plant tissue. 



Exoskeleton: the entire body wall, to the inner side of which muscles are 

 attached. 



Exotic: not a native of the place where found: an introduced species: also 

 any species occurring in any country outside of the limits of the country 

 whose fauna is under consideration. 



Exotoky: is applied to that form of reproduction where the eggs are devel- 

 oped outside of the body of the insect and without care by the mother: 

 see endotoky. 



Ex ova: from or out of the egs : applied to specimens that have been bred 

 from the egg stage. 



Expanded: spread or flattened out: applied to Lcpidoptcra when set for the 

 cabinet. 



Expanse: the distance between the apices or other widest point of the wings 

 when fully spread. 



