PINE BORERS. 705 
long and narrowish, its head and thorax much narrower than the wing-covers, 
cylindric, clothed with soft gray hairs upon a hlack ground* 
the thorax with a hlack stripe ahove and one on each 
side, where is also a stout spine ; the antennae only reach- 
ing the hase of the win.^-covers, which are dull yellowish 
gray variegated with black, each with three elevated lines, 
the outer two uniting at their tips. (Harris' Treatise, 
p. 102.) 
We have found the beetles and pupae of this 
beetle under the bark of a white pine log at Salem, 
Mass., in abundance in October, and have also 
detected it frequently in Maine in the same situa- 
tions in the spring, April 24, both in the larval 
1 o7 ir FlG 242.—Rhagium linca- 
aild adult State. turn.— Marx del. 
This larva is very common under the bark of 
pineg which have been cut down for a year or more, so that the larva 
evidently gets its growth in a year. It mav be easily recognized by 
its large size, the broad, flattened head and body, the latter not nar- 
rowing behind ; the prothorax is small in proportion to the head, while 
the antennae are minute, two-jointed. The form of the body, and espe- 
cially of the hard, corneous head admirably adapts it for its work of 
looseDing the bark, and thus forwarding the decay of stumps and fallen 
trees. 
Larva. — Body long and narrow, head remarkably large, as wide and as large as 
the prothoracic segment. 
Head behind with a triangular incision ; the apex of the incision is met by a 
curved line passing back from the outside of the antennae, dividing the epicranium 
into two areas. Clypeus more solid than usual. Labrum about twice as wide as 
long, and moderately rounded in front. Antennae minute, very short, two-jointed, 
the joints much shorter than broad (when retracted), and the second joint blunt at 
tip. Mandibles large, with three teeth on the cutting edge. Maxillae composed of 
two broad segments and a third narrower one bearing the maxillary lobe and palpus ; 
the lobe long and narrow, curved inward, reaching to the middle of the third palpal 
joint; palpus three-jointed, the basal joint somewhat swollen at the end ; second as 
long as the first, tapering toward the distal end ; third small, conical, as long as the 
second is thick. Mentum wider than long, square ; ligula square, but slightly con- 
vex on front edge ; labial palpi three-jointed, second joint a little slenderer than 
first, but of the same length ; third joint slender and as long as the second is thick. 
Prothoracic segment not so much wider than the rest of the body as in the Longi- 
corn larvae in general ; sides straight, retreating posteriorly ; surface flat and chiti- 
nous ; meso and metathoracic segments as wide as the prothoracic, but a little more 
than one-half as long as the first abdominal segment. Thoracic feet long and slender, 
four-jointed, the fourth joint minute, corneous, second and third joints of the same 
length, the third two-thirds as thick as the second. 
Abdominal segments increasing very slightly in length to the eighth, which is 
slightly longer than the preceding ones, but a little narrower than the seventh ; the 
ninth shorter and nearly one-quarter narrower than the eighth ; the tenth scarcely 
visible from above, one-quarter to one-fifth as wide as the ninth, and deeply cleft 
posteriorly. Callosities very large, soft, not well defined, being elongate, trans- 
versely-oval areas, bounded laterally by curvilinear impressed lines. Beneath, the 
callosities are a little more distinctly marked, with a transverse deeply impressed 
straight median line, into which short curved lines pass, the whole area being oval- 
cylindrical, compressed in the middle. The hairs on the body rather long. 
5 ENT 45 
