BIOLOGICAL. STUDIES OF THE GBEE^* CLOVEE WORM 
THE EGO (FIG. 4) 
Width 0.510 millimeter, height 0.346 millimeter. Subglobose, flattened, cir- 
cular at the equator, with polar axis about two-thirds length of diameter; 14 to 
16 prominent, acute, longitudinal ridges running from base to apex, each alter- 
nate (me slightly longer; interspaces concave and crossed by fine, transverse, 
regularly placed ridges; polar area sculptured by a few fine ridges; base flattened 
and taking impression of surface to which ,^_ 
attached. Color when laid shiny pale green. J^S^ 
sometimes distinctly bluish-green; partly ryk^- : 
developed eggs with pale orange spots and fpffi 
streaks scattered over upper surface, and in 
eggs still further advanced with orange spots 
turned to distinct, sparsely distributed, reddish 
brown spots. Shortly before hatching the Fig. 4.— Egg of green clover worm. 
egg turns a dark metallic purplish-gray color. Enlarged 
The empty shell is colorless, transparent, and iridescent. 
THE LARVA (FIG. 5) 
First instar. — Length 1.5 to 4 millimeters, head width 0.265 to 0.285 milli- 
meter. The newly hatched larva is slender and much constricted between seg- 
ments. Head considerably wider than body; shiny, transparent, with faint yel- 
low tinge. Body trans- 
lucent grayish-white, 
with alimentary canal 
slightly darker. " As the 
larva develops the body 
becomes faintly yellow- 
ish, usually tinged with 
green from* chlorophyll in 
the alimentary canal. 
Throughout this instar 
the first three abdominal 
segments are consider- 
ably larger than the 
others; the next four are 
about equal in size; the 
eighth, of the same width , 
is considerably longer; 
the ninth is shorter and 
narrower than any except 
the tenth and last, which 
is still shorter. The 
constrictions are deepest 
between the first four 
abdominal segments. 
Prolegs on the third and 
fourth segments rudi- 
mentary, those on fifth, 
sixth, and last functional. 
Head oblique, somewhat 
flattened, pale, shiny, 
transparent, yellowish, 
tinged with green, caudal 
edge dark. Numerous 
-Photograph showing a comparison of the six 
of the green clover worm. Enlarged 
irval instnry 
short seta? are scattered over the face, with one long one on either side of frons. 
Seta? for the most part dark and moderately long, borne on small chitinizations 
slightly darker than surrounding tissues. 
Second instar.— Length 3.5 to 7.5 millimeters, head width 0.353 to 0.459 milli- 
meter. As compared with the first instar, the first three abdominal segments 
are not so distinctly larger than the rest, the constrictions between the segments 
are less deep, and the rudimentary prolegs of the third abdominal segment are 
less apparent, while those on the fourth have become functional. Body tubercles 
nearly circular, slightly elevated, and same color as surrounding tissue; seta? fine, 
long, and pale. 
