USED IN EXTOMOLOGY. l2 g 



Sternauli: the short and often obsolete furrows on either side of the meso- 

 sternum in Hymenoptera. 



Sternellum: the second sclerite of the ventral part of each thoracic segment; 

 frequently divided into longitudinal parts which may be widely separated. 



Sternite: the ventral piece in a ring or segment. 



Sternopleura: in Diptera, the lower part of the pleura, below the sterno- 

 pleural suture and above the front coxa. 



Sternopleural bristles: in Diptera, are situated on the sternopleura below the 

 sternopleural suture. 



Sternopleural suture: in Diptera. is below and nearly parallel with dorso- 

 pleural suture, separating the mesopleura from the sternopleura. 



Sterno-rhabdite: a sternal rhabdite. 



Sternorhynchi: that series of Homoptera in which the beak or rostrum ap- 

 parently arises from the sternum between the anterior coxae ; e. g., plant 

 lice, etc. 



Sternum -a: the breast: the middle portion of the under surface of thorax, 

 between the coxal cavities. 



Stethidium: the trunk: the entire thorax with all its appendages. 



Stigma: a spiracle or breathing pore: a dense, often discolored portion of the 

 costal margin of a wing, usually at the end of the radius ; see anastomosis : 

 in Diptera, a colored wing spot near the tip of the auxiliary vein : in 

 Lcpidoptcra, the specialized patch of black scales on the primaries of 

 Hesperidce. 



Stigmata: the spiracles: also applied to the two spots, orbicular and reniform, 

 in the cell of the primaries of certain moths. 



Stigmatal line: in caterpillars, = spiracular ; q. v. 



Stigmatiferous: applied to processes or structures bearing spiracles or stig- 

 mata. 



Stimuli: the small acute spines on some larvae, especially wood-borers. 



Sting: the modified ovipositor in aculeate Hymenoptera. 



Stipes: the foot-stalk of the maxilla: articulated partly to the head, partly 

 to the cardo, and bearing the movable parts : modified into a piercing struc- 

 ture in some Diptera and into a lever for flexing the proboscis in others. 



Stipitate: supported on a stalk or pedicle. 



Stipites: the outer pair of forceps in male genitalia of aculeate Hymenoptera; 

 see sagitt.i-. 



S. T. line: sub-terminal line; crosses the primaries of many moths just before 

 the outer margin. 



Stirps: a stock or stem: a division of classification similar to super-family.: 

 not used at present. 



Stoma -ata: a breathing pore or pores: = stigma ; q. v. 



Stomach: that portion of the alimentary canal, immediately following tin 

 gizzard and preceding the ileum, into which mosl of the digestive juices are 

 poured ~- chylilic ventricle. 



Stomatodaeum: that invagination of the ectoderm that forms the mouth. 

 pharynx, oesophagus, crop and gizzard. 

 9 



