THE PINE BORER OR 
f>93 
head). This segment is transversely oblong, being as wide in front as behind ; it is 
a little more than twice as wide as long. The head is large and square, not narrow- 
ing in front, but as wide anteriorly as posteriorly. "When the head is forcibly pulled 
out it is found to be as long as broad ; anterior one-fourth of head, deep mahogany 
red, becoming blackish on the edge. Clypeus very short aud broad, about four times 
as broad as long. Labrum rather wide, not much contracted at base, rounded in 
front, with very stout bristles on the margin. Mandibles gouge-like, the ends 
oblique, hollowed out, with the outer edge produced into a point. Antennae very 
minute, three-jointed, the second and third joints about as long as the basal. The 
Fig. 230.— Monoh am mug confusor, bark showing exit perforations of 
mature beetles. (Original.) 
maxilla? form a basal joint, throwing off a three-jointed palpus, and an inner lobe 
armed with stiff bristles, reaching to the end of the second joint of the palpus. The 
2-jointed labial palpi reach to as far as the middle of the brush-like lobe of the max- 
illae ; the second joint is about as long, but half as wide, as the basal. The middle 
of each segment, especially the third to the seventh above and below, with a trans- 
verse callous spot. The upper side of the first abdominal segment has a very narrow 
oblong square area impressed upon it. The callous spot is best marked on the fifth 
segment, consisting of an area a,bout one-third as long as broad, with a square, shal- 
