BIRCH CATERPILLARS. 499 



than above, but 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""'". 



45. Apatela sp. 



The larva here described occurred on Betula populifoUa 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""". 



The three following species of the family Noctuidcc 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 11™"", September 14 to 20. 



47. Noctuid larva. 



Larva. — A singular larva, the bod j' 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"™, August 11, 1882. 



In larger ones, 17"'"' 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, 



