BIRCH CATERPILLARS. 499 
than above, bat otherwise the same. The body beneath is free from hairs and is livid 
black. The body tapers slightly towards the end ; the anal legs are very short and 
the end of the body in walking is held off the surface. Length, 41 mm . 
45. Apatela sp. 
The larva here described occurred on Betula populifolia at Bruns- 
wick, Maine, September 4. 
Larva. — Head large, rounded, pale yellowish-brown. Body rather thick, arctian- 
like, white, with radiating tufts of white hairs, a few at each end longer than the 
others and spreading, some of which are black. A pair of mesothoracic lateral light 
orange-brown tufts, as long as head is wide ; a double median, thicker, shorter 
tuft of the same color on first abdominal segment, and another just like it on the 
penultimate (8th or 9th) segment. Length, 24 mm . 
The three following species of the family Noctuidce occurred at Bruns- 
wick, Me. 
46. Noctuid larva. 
Larva. — Body thick, a little humped dorsally near the end. Head small, not so wide 
as prothoracic segment. Prothoracic not so wide as mesothoracic, and metathoracic 
wider than mesothoracic segment. 
Body of a general chestnut brown color, the surface finely granulated. Head 
slightly darker than the body, and with short hairs, the markings on the body obscure. 
Two transverse rows of black warts on the prothoracic segment, and one on meso- 
thoracic and metathoracic ; four dorsal dots arranged in a trapezoid on the abdominal 
segments. 
Each abdominal segment with a pair of lateral, short, diffuse streaks, those on the 
seventh and eighth segments converging towards the little hump on eighth segment. 
Body and feet (thoracic and abdominal) livid green. 
Length ll mm , September 14 to 20. 
47. Noctuid larva. 
Larva. — A singular larva, the body green, marked with red and yellow, with a short 
warted supra-anal horn. 
Body thick, broad, slightly flattened. Head nearly as broad as the prothorax, 
rather deeply bilobed ; green, with two broad dark velvety red transverse lines across 
the front ; the hemispheres somewhat produced upward. Six rather large double 
warts (one large conical rough one), with one on the side at base ; the two protho- 
racic ones much smaller than the four others. On the abdominal segments a low trans- 
verse dorsal ridge ending on each side in rounded conical tubercles. In front are 
the two small hair-bearing warts, and the large warts also bear long hairs. The body 
is green, color of the leaf. The abdominal segments above mottled with reddish, 
with a lateral line on posterior two-thirds of abdomen, inclosing the dorsal mottled 
and tubercled area. The supra-anal plate ends in a large stout acute granulated 
reddish horn held obliquely outward. 
On each segment are three or four small yellowish tubercles. Body beneath pea- 
green. Length, 15 mm , August 11, 1882. 
In larger ones, 17 mm long, and some smaller, the body is entirely pale reddish brown 
color, with no green about it ; no red bands on front of head. Head mottled with 
yellowish brown, and body beneath in some individuals greenish yellow. 
48. Noctuid larva. 
Larva.— A large green-headed Noctuid ; larva with ten abdominal legs. Head very 
large, broad, and full, much wider than the body. Four long white strips in front, and 
an oval lanceolate brick-red patch behind and surrounding the eyes. Thoracic feet, 
