USED IN E.XTOMOLOGY. 65 



Hypodactyle: the so-called labium of Hcmiptcra. 



Hypoderm -is: the cellular layer which secretes the chitinous cuticula and in 



this sense = epidermis : specifically applied to the lining membrane ot 



elytra and hemelytra. 

 Hypodermatic: of or concerning the hypodermis. 

 Hypodermic: under the skin. 



Hypoglossis: the under surface of the tongue = hypoglottis. 

 Hypoglottis: a sclerite inserted between mentum and labium in many Cole- 



optera. 

 Hypognathous: having the mouth parts directed more or less vertically ventrad. 

 Hypographous : shaded; applied to a fascia that becomes gradually darker. 

 Hypomeron-a: in Coleoptera; the inflexed edge of the pronotum (pronotal 



hypomera) ; and the raised lower margin of the epipleura (elytral hypomera) : 



see epipleura] fold. 

 Hypopharyngeal: relating to the hypopharynx. 

 Hypopharyngeal sclerites: in bees, a pair of strap-like pieces along the 



hypopharynx to the mentum : see also epipharyngeal sclerites. 

 Hypopharynx: a sensitive and sensory structure on the upper surface of 



labium that serves as an organ of taste, or true tongue. 

 Hypopleura: in Diptera, the space over the middle and hind coxa, between 



the metapleura and pteropleura : the side of the metasternum : the epimeron 



of the mesothorax. 

 Hypoptere: = tegula : q. v. 



Hypopygium: the anus: more specifically the lower plate of the anal open- 

 ing: in Diptera. the male sexual organs and terminal segments of abdomen: 



— propygium. 

 Hypostoma: in Diptera; that portion of the head included between antenna', 



eyes and mouth : in Hcmiptcra ; the lower part of face. 

 Hypotenusis: in Odonata; the simple or broken cross-vein between media | 



and cubitus 1, forming outer boundary of triangle. 

 Hypotypes: includes specimens upon which supplementary descriptions are 



based : = apotypes. 



I 



Iceous or Icius: suffix: expresses a likeness or the possession of a character; 



see aceus. 

 Icotypes: typical specimens which serve for purposes of identification, but 



have not been used in literature. 

 Idiotype: a specimen named by the author after comparison with the type, 



but not also a topotype. 

 Ignitus: fire-red [vermilion]. 

 Ileo-colon: the anterior portion of the hind-gut, extending from the mid-gul 



to the rectum, when not distinctly differentiated into ileum and colon. 

 Ileum: the small intestine: begins at end of chylific ventricle at the point 



where malpighian tubules join, and extends to colon. 

 Imaginal: pertaining to the adult or imago. 

 Imaginal buds, cells, or discs: in forms with a complete metamorphosis are 



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