USED IN ENTOMOLOGY. 43 



Elytrin: = chitin, q. v. 



Elytron: singular of elytra; q. v. 



Elytroptera: see Coleoptera. 



Emandibulata: that series of insects in which there are no functional man- 

 dibles in any stage. 



Emandibulate: lacking functional mandibles; e. g., butterflies and moths, 

 and applied in any stage. 



Emarginate: notched: with an obtuse, rounded or quadrate section cut from 

 a margin. 



Embolium: Heteroptera; the narrow sclerite extending along the anterior 

 margin of the hemelytra, from base to cuneus or membrane : the lobes on 

 each side of the prothorax: the special enlargement at the base of the 

 primaries which fits into a cavity in which the wing is moved. 



Embossed: ornamented with raised figures. 



Embryo: the young animal before leaving the body of the parent or before 

 emerging from the egg. 



Embryonic: found in, or relating to the embryo; in an undeveloped state or 

 condition. 



Emmet: an ant. 



Empodium: Dipt era; the small process between the pulvilli : in Coleoptera; 

 the bifid pseudotarsi between the claws : used also as = pulvillus ; and see 

 arolium, onychium, palmula, paronychium, plantula, pseudonychium and 

 pulvillus. 



Enarthrosis: an articulation like a ball and socket joint. 



Encephalon -um: the brain, or that part of the head containing it. 



Encircled: ringed; margined round about. 



Endemic: occurring normally where found: native, not introduced. 



Endocardium: the inner lining membrane of the heart. 



Endochorium: the layer of the allantois that lines the chorium; the inner 

 layer of the chorium. 



Endocranium: the inner surface of the cranium. 



Endoderm: the inner layer of the blastoderm in the embryo, giving origin to 

 the mid-intestine and other visceral organs : see entoderm. 



Endolabium: the inner or mouth surface of the labium: the hypopharynx 

 when that is well developed. 



Endomesoderm: the inner layer formed by an invagination of the middle 

 portion of the primitive band of the embryo, and from which the endo- 

 derm and mesoderm are subsequently differentiated. 



Endophytic: living within plant or tree tissue, as borers or miners. 



Endoskeletal: relating or referring to the endoskeleton. 



Endoskeleton: applied to those chitinous processes extending inward into the 

 body cavity from the body wall and serving as attachments for muscles. 



Endosternite: that part of the apodeme arising from the intersternal mem- 

 brane. 



Endothorax: the internal framework or processes of the thorax. 



Endotoky: is applied to that form of reproduction where the eggs are de- 

 veloped within the body of the mother ; see exotoky. 



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