ENTOMOLOGICAL TERMS. XV 



Sinus, a hollow, as if scooped out. 



Spiracula, the respiratory organs, situated on the sides 



of the abdomen. 

 Spiriform, antennas, tongue, rolled up in a spiral shape^ 



as in the genus Papilio. 

 Stemmata, shining eyes generally placed together on 



the crown of the head. 

 Sternum, the breast bone. 

 Stigma, the spot in the upper wings, at the branching 



of the nerves near the anterior margin. 

 Stigmata, the apertures on the sides of insects, by which 



they breathe. 

 Striated, thorax, &c. slightly channelled with parallel 



lines. 

 Subcaudated, wings, the process in the posterior wings, 



hardly longer than the indenture. 

 Subcutaneous, larvse, small caterpillars that feed within 



the substance of a leaf. 

 Submarginated, thorax, the margin having a distinct 



rim, but neither free nor elevated. 

 Subpetiolated, abdomen, attached to the thorax by a 



short tube, nearly equalling the thorax in breadth. 

 Subulated, awl-shaped. 

 Sulcated, with deep hollow furrows. 

 Suture, the part where the elytra meet and form a line 



in the middle of the back. 



Tarsi, those parts of the limbs between the tibiss and 



ungues, generally articulated with three, four, or 



five joints. 

 Tessellated, wings, marked with spots chequerwise. 

 Thorax, the back of the trunk, or that part which is 



between the head and the body. 

 Ttbitc, the legs, that part of the limbs between the 



thighs and the tarsi. 



