MAPLE CATERPILLARS. 405 
Pupa. — Pale flesh color, minutely speckled with brown, greenish between the seg- 
ments; a stigmatal row of large roundish brown spots, one on each abdominal seg- 
ment, and a dorsal row of obscure triangular spots on the abdomen, which are obso- 
Fig. 153.— Eutrapela transversata and, a, var. 
lete on the last three rings; a dorsal brown dot on the thorax, with two smaller ones 
behind it. Wing-cases darker than the abdomen. Caudal spine compressed later- 
ally, dark brown. Length, 13 mm ; width in the widest part, 5 mm . 
38. Selenia kentaria Grote. 
The caterpillar of this moth is said by Mr. Bruce to be not uncom- 
mon on the maple and birch in the vicinity of Brockport, N. Y. He 
also writes to Rev. G. D. Hulst (Entom. Ainer., ii, p. 162, 1886) : 
It is not generally known that this insect is double-brooded. All the European 
species are also. The spring brood is so much larger and richer colored than the 
late summer brood that the latter may be thought to be another species, as was the 
case with the European. 
Moth. — Bright ocherous, with the costal half of the wing sub violaceous between 
the brown lines; a much-curved line, terminating at the same distance from the 
base on both the costa and the hind edge; a mesial line, obtusely angulated below 
the costa, straight from the hind edge to the median nervure ; a third outer line, 
straight to the obscure angle just before the costa, and on the edge turned obliquely 
outward ; this line is margined for nearly the whole of its length externally with a 
subviolaceou8 hue, throwing off an oblique line toward the hind angle. An apical 
line, once angulated inward, goes to the indented outer border ; beyond deep ochra- 
ceous ; fringe darker at base, narrowly lined with silvery. Hiud wings concolorous 
with the fore-wings ; a mesial, diffuse, brown line, and the outer one subviolaceous. 
Beneath, base of fore- wings violaceous; costa at base ocherous ; inner line nearly 
obsolete, middle line dark, outer violaceous line very distinct, the apical line con- 
nected with it and inclosing an ocherous spot ; hiud wings ocherous ; a mesial, dark, 
blackish, narrow line on the discal space; an outer, narrow, violaceous line, with 
spots on the base and hiud edge ; body ocherous ; legs broadly banded with viola- 
ceous. Expanse of wings, 1.50 to 1.60 inches. 
40. The cleft-headed span-worm. 
Amphydasys cognataria Guen. 
Larva, before the last stage, PI. v ; fig. 5. 
This common inch or measuring worm is the largest species we have 
met with feeding on the maple, poplar, or willow, and may be readily 
recognized by its deeply cleft head and reddish-brown or green body 
like a reddish or green willow twig, which it closely mimics. We have 
noticed it as frequently in Jackson, X. EL, as in Maine. It is first 
