152 
Psyche 
[December 
Fig. 5. Roughly shagreened and covered with many short 
white hairs. Body length 22 mm. Light green. 
Chrysalis. 
Length 18 mm. Narrow and generally cylindrical in shape. 
Anterior end acute. Cremaster long and pointed. Tongue 
case same length as chrysalis but free from base of wing 
pads to end. Surface of chrysalis smooth. General color 
light green. Free portion of tongue case with slight pinkish 
tinge. Cremaster transparent and colorless at its tip. 
Prior to emergence of the adult the dark color of the wings 
becomes visible as does also the brilliant red of the eyes. The 
duration of the chrysalis stage is eight days. 
Prenes nero sylvicola (Herrich-Schaffer) 
Egg. 
Height .5 mm. Greatest diameter .75 mm. The eggs 
range in color from bone white to flesh. The surface is 
adorned with a raised reticulation forming polygonal cells. 
First Instar. 
Head height .5 mm. ; head width .6 mm. Head piceous, 
shiny, punctate, and with few whitish hairs. Body length 
2 to 4 mm. Yellow on emergence, light green after eating. 
Covered with a few short brown clavate hairs. Anal plate 
with two pairs of very short (for this position) recurved 
hairs. 
Second Instar. 
Head height .75 mm. ; head width .6 mm. First appear- 
ance of characteristic head pattern (cf. Fig. 11). Head with 
raised reticulation and short brownish to colorless hairs. 
Ground color light yellowish to greenish. Length of body 4.5 
mm. Body clear grass green with a dark green mid-dorsal 
line bordered by a narrow white line. Also thin white para- 
dorsals. Body covered with minute black hairs. 
Third Instar. 
Head height .9 mm. ; head width .9 mm. Dark areas of 
head pattern more extensive than in following instar (Fig. 
11). Minute black hairs covering head. Length of body 6 
