’ INSECTS INJURIOUS TO THE SPRUCE. 233 
flattened and broad tubercle on each segment. This is a very pretty 
wood-colored caterpillar, congeneric with No. 9 on the fir. They vary 
in intensity of color, some being much darker than others; the small 
ones paler. Length, 12™™. 
14. THE LIVID GREEN SPRUCE MEASURING-WORM. 
Feeding on the leaves late in August in Maine, a peculiar very smooth slender 
larva; the head smooth, as wide as the body; the latter of uniform width. Above livid 
greenish, with a faint purplish tint. Lateral ridge pale green; body beneath pale 
greenish. Length 12™™. 
15. THE RED AND YELLOW-STRIPED SPRUCE MEASURING-WORM. 
Order LEPIDOPTERA ; family PHALA NIDA. 
Feeding on the leaves late in August, a small geometrid caterpillar, with the body 
flattened, reddish above, with a linear, very narrow delicate red dorsal line; lateral 
ridge straw-yellow. Anal plate short and broad, with two conical spines projecting 
behind it. Body beneath whitish yellow. 
16. THE SPRUCE TWIG-MIMICKER. 
Order LEPIDOPTERA; family PHALZNID. 
This interesting geometrid caterpillar is over an inch (30™™) long, and 
closely mimics the dry twigs of the spruce and fir. The head is slightly 
*wider than the body; rounded, the vertex on each side rather full. The 
body with four smal], high, rounded dark tubercles on each segment ; 
and low down on the side of each segment is a group of four irregular 
dark tubercles. Just behind the prothoraciec stigmata is a dorsal, high, 
prominent transverse rough ridge. Supra-anal plate rounded at the 
apex, with four setiferous, slender, rounded tubercles, arranged nearly 
in a square, and projecting backward from the apex; while below the 
two anal tubercles are large, full, and rounded at the end. General 
color ijilac-ash; head variously striped and mottled, and the body irreg- 
ularly mottled and spotted with ash and black. Segments transversely 
wrinkled; the lateral ridge moderately prominent. In the young, two- 
thirds grown, the body is darker, and there is a row of irregular con- 
spicuous white spots on the side of the body. It is distinguished from 
No. 9 on the fir by the rounded, less angular head, and by having four 
instead of two tubercles, but belongs to the same genus. It is also 
different from No. 9 on the fir in not having a lateral yellow line. 
17. THE CONE-HEADED SPRUCE CATERPILLAR. 
A noctuid or sphinx? larva, feeding late in August in Maine on the spruce, with 
ten abdominal feet. Head very large, vertex high, ending in a large cone. Supra- 
anal plate large, long, triangular, ending in two blunt conical tubercles. Head pale 
green, tipped with red on the point of the vertex, from which two faint white bands 
pass down by theeyes. Clypeus and labrum honey-yellow, black on the sides. Two 
dorsal and two lateral continuous linear white lines. A broken substigmatal broad 
snow-white line. Thoracic feet pale green; abdominal feet tipped with red. Moulted 
August 30. Length 207, 
