242 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
27. LimeniUt arfkemii (Draij). 
(iosse, in his •• Canadian Naturalist " (220), gives a figure of the larva, 
pupa, and under side of the butterfly of this species.* The butterfly ap- 
pears about the 1st of July. Iu the first week in July we have seeu 
this butterfly in great numbers in the White Mountains. 
28. The four-horned bphjhz. 
Ceratomia amynlor (Hiibner.) 
(Larva, PI. xi, fig. 1.) 
The. caterpillar, as observed by Harris (under the name of Ceratomia 
quartricornis), in one case hatched July 31. A record of its occurrence 
on the white birch is mentioned iu " Psyche," 368, 1882. Professor 
Kiley states that Boll found the caterpillar on the osage orange. Mr. 
Pilate has also observed the caterpillar ou the linden in Ohio. A young 
larva found August 20, and 35 ram in length, was green with 7 paler 
green lateral oblique stripes, the four thoracic horns being very promi- 
nent. 
This worm not unusually occurs from Maine southward on the elm, 
becoming fully fed early in September, when it descends into the ground 
and pupates, the moth appearing the following May and June. I have 
taken it in Maine as early as May 24. The moth is a large broad- winged 
sphinx, with gray or ashen body and wings, the anterior pair with a 
large white dot near the front edge. 
Egg. — Nearly of a compressed spheroidal shape, green, and with very fine reticula- 
tions. (Harris' Corr., p. 82.) 
Larva before first molt. — Yellowish green, with a darker dorsal line, a long red 
caudal horn, and a very large, green head, with the dorsal denticulatious and tu- 
bercles obsolete. A newly hatched larva is about one-fifth of an inch long, pale green, 
with a straight caudal horu about half the length of the body, dotted and tipped 
with brown. There is a pair of minute thoracic horns on the top of the third segment 
and another pair on the top of the fourth, and there is a row of minute fleshy teeth 
along the middle of the back, which are scarcely visible. Before the first molt the 
larva has nearly doubled its size and has a white vascular line, a faint line on each 
side of the middle of the back and seveu oblique stripes on each side of the body, all 
of the same color. The head is smooth and the thoracic horns are barely visible. 
They molt their skins in about five days after they hatch, after which the head and 
caudal horn are granulated, the thoracic horns prominent, the fleshy teeth along the 
middle of the back with the stripe ou each side of it; the oblique stripes on the sides 
and the thoracic lines are plainly visible. 
The second molt is made in from five to eight days after the first, when the row of 
teeth along the middle of the back is prominent, the lateral oblique stripes are gran- 
ulated, and the caudal horn is pale yellow with granulations in frout and behind. 
The third mult is made in from six to eight days after the second, when the larva 
is light green with the teeth along the back and the granulations no the side of a 
whitish color. The caudal horn is now curved, of a yellowish-green color, and cov- 
• See also Scudder's " Butterflies of the Eastern United States," 18c9. 
