50 MISCELLANEOUS COTTON INSECTS. 
May 13, when a single pair was observed. On May 20 several pairs 
were observed en copula and other females were found to be full of 
mature eggs. At this time they had left the elms and some had migrated 
to sorghum, cotton, corn, and sunflowers, but they were still common on 
hackberry. On June 10 the adults were numerous on sunflower and 
pigweed; and nymphs, undoubtedly of this species, were found on 
hackberry. On the 17th as many as fifty to the stalk were observed 
on sunflowers; but although common on weeds at the edges of the 
fields, none were found on cotton. During the weeks previous to 
this date none were seen on elm or hackberry, but they were quite com- 
mon on cottonwood. During June and July numerous unsuccessful 
attempts were made to secure eggs from adults in confinement. Until 
about July 20 the adults were 
common upon sunflower and 
\ /"~\ cottonwood, but at about that 
\ J X / date the} 7 became more scarce, 
V V/ and were found only on young 
bushes. During the early 
// ■';' • % summer a few nymphs in vari- 
^ II 1] ^ ' . ous stages of development 
: \\ were usually found with the 
/ I \ adults. 
^%$T At Terrell several adults 
\ % ^ a were confined on cotton June 
IT. The next day one lot of 
ten eggs was laid in a row 
just under the epidermis. 
Vrr , on rr , 7 - , , 7 u t , P+ , f f These hatched June 24, and 
Fig. 30. — Homti/oih^cti tn</uelra: adult at left, last stage ' 
of nymph at right; young nymph below— all enlarged the nymphs molted Oil July 
(author's illustration). ^ -, i o- it 1. ^ r ah 
11 and 25 and August 15. All 
died on August 26. After the third molt the wing pads were just 
appearing. Judging from this fact and comparing further observa- 
tions on nymphs taken in the field August 8, which molted once 
before becoming adult, it seems probable that had these nymphs 
lived they would have molted twice more and become full grown 
early in September. During the latter half of July the adults were 
decidedly less abundant near College Station. About the 1st of 
August the cowpea was found to be a favorite plant for food and 
for oviposition. Young were observed hatching on August 3, and 
5, and at about the same time n} T mphs were observed to make the last 
molt and become adult. During the first two weeks of August numer- 
ous egg masses were laid in cowpea leaves in field cages at the college, 
often two or three masses in a leaf. The eggs are usually laid in rows 
on the ventral side of the leaf, averaging about twenty in a row. The 
surface of the leaf above the eggs is covered with a whitish powder 
