FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
furrow irith smooth sides, somewhat interrupted iu the middle; elytra densely punct- 
urrd, with alternate oblong, raised, shining interstitial spaces, prolonged entire to 
tli. Apex; length, .5? to .75 inch. Male with the pectus broadly sulcate, villose; 
the intermediate tibia armed with an internal acute tooth j the last ventral segment 
traneate-emarginate. Female wijh the pectus smoother, less sulcate; the last ven- 
tral segment tridentate; the intermediate tooth obtuse, defined by minute incisions. 
Abundant at Lake Superior; according to Kirby found in latitude 
66° and in the Rocky Mountains. Iu addition to the characters given 
above, Le Coute adds : 
The under surface is oopper-oolored, coarsely and densely punctured on the sides, 
abdomen and presternum, less densely on the metasternum and middle of the first 
segment of the abdomen : the divided portions of the mesosternnm are coarsely and 
tolerably densely punctured. The outer costa' of the thorax are interrupted so as to 
form on each side au apical and basal callosity. A female from Newfoundland 
differs by the epipleune being green, the under surface of the prolonged extremity 
of the elytra blue, and by the incisures between the anal teeth being more widely 
separated. 
Mr. George Hunt has found this beetle under the bark of the white 
pine in the Adirondack Mountains, New York, in October. 
20. The common longicorn pine-borer. 
Monohammus confusor Kirby. 
Order Coleoptera ; family Cerambycidj:. 
Boring a hole, in outline round and regular, deep in the wood of sound, though 
usually in decaying trees, and doing much injury to pine timber ; a large, soft, white, 
fleshy, nearly cylindrical grub, the segment next the head larger than the others, 
ilattened, horny, and inclined obliquely downward and forward, the succeeding rings 
very short, with a transverse oval rough space on the middle above and below ; pupat- 
ing inside in the wood, the beetle emerging from a round hole half an inch in diameter ; 
the beetle one of our largest longicorns, with very long antenna? : the body brownish- 
gray, the wing-covers spotted with black and white ; length, 1.20 inch. 
Nothing was known of the habits of this borer by Harris, in the third 
editiou of whose treatise the beetle is well figured. In 1860 Dr. Fitch 
gave an excellent account of the habits, and a brief description of the 
larva and pupa and adult, in his Fourth Report on the Noxious Insects 
of New York. The following description of the larva and pupa is based 
on specimens obtained at Brunswick, Me., and compared with some 
received from Mr. F. C. Bowditch, who published in the American Nat- 
uralist, August, 1873 (p. 498), an account of the habits and transforma- 
tions. He sent me a block of pine wood split off, containing the ter- 
minal portion of the cell, stuffed with large chips arranged quite regu- 
larly. In the museum of the Peabody Academy of Science, at Salem, 
is a piece of planed plank, which had beeu sawed so as to uncover part 
of the hole, with the beetle within, as seen in Fig. 227. Fitch states that 
this and Monohammus scutellatus and marmoratus are the most common 
and pernicious borers which occur in the pine timber of New York. 
On a still summer's night as well as in the day-time the peculiar grating 
or crunching noise which the larvae make in gnawing the wood may be 
