242 INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
of decay: “In a hemlock tree I found, July 20, in New York, hundreds 
of the larvee of all sizes from 5-50™™ in length; the wood being exceed- 
ingly hard and tough, but although the new developed imagines (soft) 
were very abundant, and although I found some mouldy dead pupe, I 
could not find a live pupa.” 
AFFECTING THE LEAVES. 
9, THE HEMLOCK INCH-WORM. 
Order LepmporTEeRa; family PHALHNIDZ. 
Feeding on the leaves late in August in Maine, a slender-bodied 
measuring inch-worm of the general color of the terminal twigs, and 
not quite so wide as a hemlock leaf. Head not so wide as the body, 
with a moderately deeply impressed median line; pale flesh-colored, 
mottled, with pale reddish brown spots, and with long brown hairs. 
Body mostly greenish yellow, the tints pale and delicate. A dorsal 
row of diffuse elongated spots, extending backward from the transverse 
blackish stripes on the sutures between the segments. On each of the 
three thoracic segments is a.transverse row of black warts and hairs, 
situated on the hinder edges of the second and third segments from the 
head; but nearer the middle in the segment next to the head. All the 
abdominal segments covered with fine whitish warts, giving a sha- 
greened appearance to the skin. The lateral raised line very promi- 
nent, the body not being thick, but appearing as if partly shrivelled 
below a dusky lateral stripe. Supra-anal plate large, broad, flat, sub- 
triangular. On the the underside of the body a median dusky linear 
stripe, on each side of which the body is whitish. Two faint dusky 
subdorsal lines, one on each side. This is very near to and is congenerie 
with No. 8 on the fir (p. 237). 
10. Tue 10-LINED PINE INCH-WORM. 
This was also found on the hemlock at Brunswick, August 27. 
INSECTS INJURIOUS TO THE ROCKY MOUNTAIN SPRUCE (Abies 
menziest). 
AFFECTING THE TRUNK. 
1. THE ROCKY MOUNTAIN SPRUCE TIMBER BEETLE. 
Dryocetes affaber Mannh. 
Order COLEOPTERA; family SCOLYTID. 
This beetle occurred (July 7, 1875) in abundance in all stages in a 
growth of Abies menziesii,* the common spruce of the Rocky Mountains, 
*This tree was kindly identified for me by Mr. Sereno Watson, from specimens of 
the leaves and cones sent him for identification. 
