1942] 
Metamorphoses of Cuban Pyrginx 
5 
Light greenish yellow. Many lighter pale greenish yellow 
spots scattered over the surface of the body. The numerous 
short scattered hairs arise from these. Slight bleaching of 
shield in the mid-dorsal line. Numerous short hairs on 
shield. Prothoracic legs fuscous. Hairs on anal plate black. 
Third Instar. Head height 1.2 mm. ; head width 1.4 mm. 
Head more roughly shagreened than before. Pronounced 
rugosities at apex of vertex. Black. Body length 7 mm. 
Javel green. Anterior edge of shield ochraceous orange, 
posterior part fuscous. Remainder of segment orange. No 
other noticeable changes in the body. 
Fourth Instar. Same as above. 
Fifth Instar. Head height 2.4 mm. ; head width 2.7 mm. 
Head very roughly shagreened. Apex of vertex with large 
rugosities, larger near median line. Head fuzzy and downy 
in appearance due to the numerous short tawny hairs. 
Eggs laid on the food plant July 11 hatched July 14. 
Each instar required from three to four days. 
Polygonus lividus Hbn. 
Second Instar. Head height .8 mm. ; head width .9 mm. 
Head black, rugose. Few scattered light colored hairs. 
Body length 6 mm. Dull green yellow. Mid-dorsal line 
faint, darker green due to transparency there. Thin, 
irregular, yellowish para-dorsals. Body sparsely dotted 
with small yellow spots. Anal area suffused with yellow. 
Third Instar. Head height 1.2 mm. ; head width 1.6 mm. 
Head slightly more rugose. Not noticeably rougher at ver- 
tex than elsewhere. Body length 7 to 11 mm. Markings 
same as before. General color meadow green. Para-dorsals 
and spots bright chalcedony yellow. 
Fourth Instar. Head height 2.0 mm. ; head width 2.4 
mm. Head black. Surface broken up into roughly poly- 
gonal raised reticulations. Flat scale-like protuberances on 
apex of head directed away from median line. Not so pro- 
nounced as the rugosities in G. dorantes. Head very flat- 
topped. Scattered, very short, colorless hairs. Body 
length 20 mm. Meadow green. All legs and ventral side 
of thoracic segments bright chalcedony yellow. Shield con- 
