THK SOUTHERN PINE SAWYER. 



47 



thorax). Larva? which dcveloi) into tllc^ smaller sized jidults are, of 

 course, mucli smaller than this at maturit}'. The hody is divided 

 into 14 well-marked segments. The first is the head. The fcjllowing 

 three constitute the thorax, the first being the prothorax, the second 

 the mesothorax, and the third the metathorax. The following 9 seg- 

 ments constitute the abdomen, and are desig- 

 nated as the 1st, 2d, 3d, etc., abdominal seg- 

 ments. The last segment is called the anal 

 segment. The head (fig. IG, a) is considerably 

 longer than broad, and is capable of being 

 deeply retracted into the thorax. The pro- 

 thorax, upon the anterior part of the upper or 

 dorsal surface, is smooth and shining, but the 

 posterior part has an opaque leathery appear- 

 ance. Tliis opaque surface is dotted over by 

 small shining spots more or less longitudinally 

 elongate in shaj)e. The mesothorax is smootli 



upon the upper or dorsal surface, but on the lower or ventral surface 

 is found a double transverse row of fine fleshy granules. On the ex- 

 treme anteriorportion of the side of this segment isfound a transverse, 

 oval, brown si)ot. This is the first spiracle or breathing pore. On the 



Fig. 15.— The pine sawyer. Epg, 

 preatly enlarged: a, Chorion; 

 b, amnion; c, micropyle; e, 

 same, highly magnifled; d, 

 sculpture of chorion. (Orig- 

 inal.) 





Fro. 16.— The pIno sawyer. Larva, slighlly cn!argc<l: a, Foropartof head; 6, second 

 abdominal segment; c, abdominal spiracle, o, 6, Greatly enlarged. (Original.) 



metathorax a double transvei*se row of granules occurs, both on the 

 dorsal and on the ventral surface, but there is no spiracle uj)on this 

 segment. On the first 7 abdominal .segments there are 4 rows of 

 granules on the dorsal surface (fig. 16, h), and 2 on the ventral. The 



