THE LARCH LAPPET MOTH. 899 



nately the larvae died in confinement, the description is here given with a 

 view to future identification of the imago. 



Larva. — Body smooth, of even thickness, cylindrical. Head and body uniformly 

 pale pea-green. Four broken dorsal white stripes. Sutures tinted straw-yellow. Tho- 

 racic feet greenish amber ; abdominal feet green. Spiracular line white and yellow, in- 

 closing the distinct reddish spiracles. Supra-anal plate broad triangular; as long as 

 broad and pointed ; surface roughened at the end. Length 20""™. 



16. Geometrid caterpillar. 



This larva occurred on the hackmatack in Brunswick August 30. By 

 September 25 it became fully grown, and commenced to pupate. The 

 fully-grown larva differed in being not so much humped as the young 

 larva described below. Unfortunately it did not live through the 

 winter. 



Toiing Larva. — Length, 20™™. Body slender cylindrical, a little thickened on pre- 

 anal thoracic segments. Head very deeply cleft ; as wide as the body in the middle, 

 but not so wide at the prothoracic region. Prothoracic segment much enlarged, with 

 a hump on each side of the front edge. On fifth abdominal segment a pair of very 

 prominent lateral long tubercles and legs moderately large, the dorsal acute tuber- 

 cles of moderate size. Body dull brick-red, with a squarish patch on the front of each 

 segment marbled with black and whitish. There is a median black line on the thoracic 

 region. Body glaucous grayish, white under the last third of abdomen. It may be 

 recognized by its dull brick-red body checked with dark, the humped prothorax, 

 and two prominent tubercles on the fifth abdominal segment. No warts or papillae; 

 the body a little wrinkled. 



17. Geometrid larva. 



This caterpillar occurred on the hackmatack, in Maine, June 27 to 28. 



Larva. — Body very long and slender, exactly mimicking a slender dark twig. Head 

 very large, much wider than the body, being unusually large in proportion to the 

 body ; full, rounded, but somewhat flattened ; in front black, with two short brown 

 stripes on each side of vertex ; antennae whitish flesh-color; sides of head mottled with 

 brown and black. Thoracic feet flesh-colored, mottled with black spots. 



A high double transverse black tubercle on fifth abdominal segment. Two small 

 round black mamillse-like warts on penultimate segment. Last segment very large 

 and broad; pale horn-brown. Supra-anal plate five-sided with 6 piliferous warts on 

 the edge, 2 on the apex behind ; 4 black small high rounded warts on back part of each 

 segment, arranged in a square ; 2 fine, light, not distinct supra-stigmatal lines. Lateral 

 raised ridge distinct. Abdomen beneath reddish, with 7 to 8 black warts at the end 

 of each segment. From all the warts arise short, upright, stift' hairs. Length, 18™"". 



18. Geometrid caterpillar. 



This caterpillar occurred at Brunswick, July 19. Beginning to pu- 

 pate among leaves and becoming a pupa the 21st. Also found on the 

 hackmatack in a following year in the middle of July ; it will feed on 

 the fir. 



Larva. — Body smooth, of even thickness throughout. Head as wide as the body, 

 smooth ; sides rounded ; sutures well impressed. Head deep blood-red, black on 

 the sides, while the entire clypeus is bright green. Body bright green, exact color 

 of leaves, with a distinct dark, firm, almost black, stripe along the side, edged above 



