USED IN ENTOMOLOGY. 27 



Clavola: see clava. 



Clavus: the club of an antenna; = clava and clavola: in Heteroptera, the 



oblong sclerite at the base of the inferior margin of the hemelytra: the 



knob at the end of the stigmal or radial veins in certain Hymenoptera. 

 Claws: the claw or hook-like structures at the end of the foot or tarsus. 

 Cleavage: see segmentation of egg. 

 Cleft: split: partly divided, longitudinally: in Colcoptera applied to claws so 



divided that the parts lie one above the other. 

 Clintheriform: shaped like a plate. 

 Cloaca: see rectum. 

 Clubbed: see clavate. 



Clypeal suture: marks the division between clypeus and epicranium. 

 Clypeate: shield-like in form. 

 Clypeate constriction: applied when a surface is drawn in from the sides 



so as to produce a shield or saddle-like form. 

 Clypeo-f rental suture: = clypeal suture. 

 Clypeus: that portion of the head before or below the front, to which the 



labrum is attached anteriorly ; in Diptcra often visible below the margin 



of the mouth in front, as a more or less visor-shaped piece: = epistoma. 

 Clypeus anterior: see ante-clypeus. 

 Clypeus posterior: see post-clypeus. 

 Coactus: condensed; of a short stout form. 

 Coadapted: formed so as to work together to one end; as the mandible and 



maxilla in Chrysopids, etc. 

 Coadunate: joined together at base; two or more joined together; said of 



elytra when permanently united at the suture. 

 Coagulate: to congeal; to change from a fluid to a jelly. 

 Coagulum: a clotted mass, as of blood. 

 Coalescent: united or grown together. 

 Coarctate: contracted: compacted: applied to that form of pupa in which 



all the members of the future adult are concealed by a thickened, usually 



cylindric case or covering, which is often the hardened skin of the larva : 



beginning with a narrow base, then dilated and thickened. 

 Cocardes: retractile vesicular bodies on each side of the thorax in certain 



Malachidce. 



Coccineous: cochineal red; dark red [carmine]. 

 Cochleiformis: formed like a snail shell. 

 Cochleate: spirally twisted like a screw or a univalve shell. 

 Cocoon: a covering, composed partly or wholly of silk or other viscid fibre, 



spun or constructed by many larva: as a protection to the pupa. 

 Cocoon-breaker: structures or processes of the pupa, often on the head, by 



means of which it works its way out of the cocoon. 

 Coecal: ending blindly, or in a closed tube or pouch. 

 Coecum: a blind sac or tube: applied to a series of appendages opening into 



the alimentary canal at the junction of the gizzard and chylific ventricle: 



see caecum ; the two are used interchangeably. 

 Coeloblast: the endoderm in the narrower sense. 



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