USED IN ENTOMOLOGY. 129 



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 Dipt era, the lower part of the pleura, below the sterno- 

 pleural suture and above the front coxa. 



Sternopleural bristles: in Dipt era, are situated on the Sternopleura below 

 the Sternopleural suture. 



Sternopleural suture: in Dipt era, 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 coxse ; 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 anasto- 

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

 in Lepldoptera, the specialized patch of black scales on the primaries of 

 Hesperidce. 



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

 form, 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 Diptcra 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 Hymenop- 

 tera; see sagittse. 



S. T. line: subterminal 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 the 

 gizzard and preceding the ileum, into which most of the digestive juices 

 are poured : = chylific ventricle. 



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

 pharynx, cesophagus, crop and gizzard. 



