USED IN ENTOMOLOGY. 69 



Interplical: lying between folds; specifically applied to the alternate ridges 



and grooves in anal area of secondaries of Orthoptera. 

 Interposed sectors: in Odonata; the shorter longitudinal veins occurring in 



the wings of some species between the chief veins ; ^ supplementary sectors. 

 Interrupted: broken in continuity, but with the tips of the broken parts in a 



right line with each other. 

 Inteisegmental: ^ interarticular ; q. v. 

 Interspace: Coleoptera ; the plane surface between elytral striae: Lepidoptera ; 



spaces between wing veins not included in closed cells. 

 Interspaceal: occurring in the interspaces between two wing veins or two 



elytral striae. 

 Interstice -tium: space between two lines, whether striate or punctate. 

 Interstitial line: the elevated ridge between two striae or series of punctures. 

 Interval: the space or time between two structures, sculptures or periods of 



development. 

 Interventricular: the inner valve between the chambers of the heart. 

 Interventricular valvule: of heart, lies in front of semilunar valve. 

 Intervenular: in the space between two veins. 

 Intestinal caecum: that point of the large intestine in front of the junction 



with the small intestine. 

 Intestine: that part of the alimentary canal through which the food passes 



from the stomach, in which absorption is completed and the excretions are 



formed for expulsion. 

 Intima: the lining membrane of the trachea: see endotrachea. 

 Intorted: turned or twisted inwardly. 

 Intra-: within: between. 

 Intra-alar bristles: in Diptera; a row of two or three between the supra-alar 



and dorso-central groups. 

 Intra-cellular : occurring within the cell or in a cell. 

 Intra-humeral bristles: in Diptera calypirata ; occur immediately in front of 



the thoracic suture, between the humeral callus and the presutural depression. 

 Intra-ocular: situated within the eye, actually or apparently. 

 Intra-pulmonary: that method of respiration which does not involve move- 

 ments of the outer body wall and is confined to the respiratory organs. 

 Intra-uterine: applied to development, when the young hatch within the 



vagina of the mother. 

 Intricate: irregular; confused; applied to markings and sculpture. 

 Intromittent: used for throwing within. 

 Intromittent organ: the penis; q. v. 

 Introse-um: directed inward, toward the body. 

 Intrusus: seemingly impressed with a sharp point. 

 Intumescent: enlarged; swollen; expanded. 

 Invaginate: when a tubular or vesicular part is turned inward or retracted 



within the body wall. 

 Invagination: a pouch or sac formed by an infolding or indrawing of the 



outer surface. 

 Investitus: unclothed: a surface without scales or hair. 



