142 ILLINOIS BIOLOGICAL MONOGRAPHS [142 



Coxa, n. The first segment of a thoracic leg. 



Crochet, n. One of the series of chitinized, hook-like, cuticular 

 structures usually arranged in rows or in a circle on the prolegs of 

 lepidopterous larvae; also known as "hooks". 



Epicranial suture, n. The suture separating the front from the 

 rest of the epicranium, shaped like an inverted Y, with the front be- 

 tween the arms and the vertex on both sides of the stem. (Fig. 72.) 



Epicranium, n. The sclerite which constitutes the greater part of 

 the head capsule. 



Fleshy filament, n. A flexible, attenuate process of the body wall, 

 borne by some butterfly larvae. (Fig. 92.) 



Front, n. The sclerite between the arms of the epicranial suture, 

 usually triangular in shape. 



Gibbous, a. With a large, rounded, dorsal hump. 



Heteroideous, a. Said of crochets when a well developed series is 

 flanked by a row of smaller crochets on each side, as in Arctiidae. 

 (Fig. 100.) 



Homoideous, a. Not heteroideous. - 



Homology, n. See Part One, p. 15. 



Homotypy, n. See Part One, p. 15. 



Horn, n. A stiff, pointed, unbranched, cuticular process. 



Mesoseries, n. A band of crochets extending longitudinally on the 

 mesal side of a proleg ; when curved, varying from a quadrant to slightly 

 more than a semicircle in extent. (Fig. 105.) 



Moniliform, a. Possessing distinct, neck-like constrictions between 

 successive segments, producing a resemblance to a string of beads, as in 

 many leaf-miners. 



Multiserial, a. Arranged in several concentric rows, as the crochets 

 of Hepialus, Pseudanaphora, etc. (Figs. 94, 96.) 



Multisetiferous, a. Bearing many setae. 



Onisciform, a. Depressed and spindle-shaped, like an oniseid, as 

 in some lycaenid larvae. 



Osmaterium, n. An eversible gland producing an odor, as in 

 Papilionidae and Liparidae. 



PenelUpse, n. A series of crochets more than a semicircle in extent 

 and less than a complete circle. It may be either (a) lateral, covering 

 at least the lateral half of the planta, as in Psychidae (Fig. 85) ; or (b) 

 mesal, covering at least the mesal half of the proleg and interrupted 

 laterally, as in Pyraustinae (Fig. 98). 



Pinaculum, n. A small, flat, chitinized area bearing from one to 

 four setae. 



Plate, n. An extended chitinized area of the body wall, such as a 

 shield ; often multisetiferous. 



