55 
the middle, the yellow color showing strongest about the margins. 
The sculpture is fine, but strong and very irregular, the areas showing 
as irregular triangles, quadrangles, and pentagons (c). They are 
usually deposited on the under surface of the leaf and in masses of 
from one to two score, although smaller masses of from two to three 
or five eggs are not uncommon. 
The newly-hatched larva is nearly uniform gray in color, with small 
black tubercles and no visible evidence of striation. The head is 
round and prominent and nearly twice as wide as the body, and the 
hairs of the body are sparse and about as long as the width of the head. 
The full-grown larva.—The larva when mature is bluish-gray above, 
with conspicuous transverse black stripes. The head is yellowish or 
light brown, the thoracic plate mottled (fig. 12, ¢), and each segment 
has three or more well-defined, nearly straight or curved, transverse 
stripes. (On the second and third thoracic segments the first stria 
curves forward between the anterior tubercles.) The dorsal tubercles, 
Fig. 12.—Pionea rimosalis: a, moth; b, egg mass; ¢, sculpture of egg; d, larva; e, cocoon—a, d, e, twice 
natural size; .b, much enlarged; c, more enlarged (original). 
of which there are two pair of prominent ones in each segment, are 
gray, partially encircled with black. There is a wide stigmatal line 
of bright yellow extending from the second to the last segments, and 
above each spiracle there is a large prominent black tubercle. The 
ventral surface is green, somewhat mottled with yellowish, and the 
tubercles bear each a long, black hair about half as long as the width 
of the body. In form the larva is subeylindrical, moderately slender, 
about six times as long as wide, and the segments of the body show 
strongly at the sides. The length of the mature larva is about six- 
tenths of an inch, 15™" in repose, 17"" when fully extended, and the 
ereatest diameter is about 2.9™™, 
The pupa is of the usual pyraustid form, the wing-cases and head 
dark brown and the abdomen light yellowish brown. ‘‘ Head small, 
rounded, with a slight transverse notch anteriorly; wing, antennal and 
posterior leg-sheaths extending nearly to tip of fifth abdominal joint. 
Abdominal joints with sutures plainly marked, the two terminal joints 
