176 THE COMMONER BUTTERFLIES. 



Entire (of a margin) : whole and even. 



Environment : surroundings and their influence. 



Eversible : capable of being turned inside out. 



Extramesial : beyond the middle. 



Falcate : sickle-shaped, convex on one side, concave on the 



other. 

 Fenestrate: resembling a window or opening. 

 Frontal triangle (of the caterpillar) : the large triangular 



piece on the face. 

 Granulated : covered with small, grain-like elevations. 

 Hemisphere (of the caterpillar): one lateral half of the 



head. 

 Hibernaculum : wintering nest of the caterpillar. 

 Incisures : impressed lines, separating the segments of the 



body. 

 Infralateral: just below the lateral line or a line midway 



between the middle of the back and the spiracles. 

 Infrastigmatal : just below the spiracles, or the spiracle- 

 line. 

 Inner margin (of the wing) : see Figure, p. 60. 

 Intergrades : forms intermediate between others. 

 Internal vein : see Figure, p. 60. 

 Interspace : space between two adjoining nervules. 

 Intramesial: before the middle. 

 Irrorate: bedewed or uniformly sprinkled. 

 Isotherm: line of equal temperature. 

 Lateral (of the caterpillar) : along a line midway between 



the middle of the back and the spiracles. Sometimes 



applied loosely to the sides in general. 

 Laterodorsal : situated midway between the lateral and 



mediodorsal (which see). 

 Lunulate : in the form of lunules or moon-shaped crescents. 

 Mandibles (of the caterpillar) : the biting jaws. 

 Margin and Border are used interchangeably. 

 Median vein : see Figure, p. 60. 



