. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 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. T
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 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.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington : G. P. O.
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