GLOSSAEY 101 



Rudimentary — Any organ or structure which has not yet reached 

 its full development. 



Segm.ent — One of the successively repeated units of the body of 

 a jointed animal. 



Seta — (pi. setae) : stiff "hairs" or bristles. 



Somatic — Pertaining to the body cells as contrasted with the 

 reproductive cells. 



Somite — One of the divisions of the body of a segmented animal. 



Spiracles — External openings of the respiratory system of in- 

 sects. 



Stalked — Extending beyond the margin of the body at the tip 

 of a stalk. 



Stipple- — A method of portraying structure by the use of fine 

 dots. 



Succeed — (See succession.) 



Succession — A term used in ecology to indicate the change in 

 species present at any one point due to changes produced 

 by organisms there or due to physiographic causes. 



Symmetrical — Parts of the body arranged in regular order with 

 reference to one or more axes or planes. 



Tarsal claws — One or more claws or hooks at the end of an in- 

 sect's foot. 



Tarsus — (pi. tarsi) : the foot. 



Thorax — In arthropods and vertebrates, that part of the body 

 between the head and abdomen, usually bearing appendages. 



Tissue — A group of similarly differentiated cells. 



Tracheae — Air tubes within the body of an insect, serving for 

 respiration. 



