TABLE II.—Duration of nymphal instars of Chlorochroa sayi in period 
[o} ° a) be 
Alas deve |) 8 “ 
Sh gales g FI os | 38 
3 2 » > Me) a7) 
Bea be oe se Se 
ey Gq om fom op) op) 
Days. Days. 
1....)| July 5 | July 10 5 July 19 9 
pis ise ai do...|.-.do.... 5 sad ouen: 9 
See eeedOe= = |e aedOns- 5 wdow 9 
Amal Osc aeed0es. 5 July 17 7 
SS Se GaSe Odea ee cC Kays ai ea) do.. 7 
Geese seedou. cs) ae. do... 5 July 18 8 
Ue SSAIGSOMSSaaGEC OLee 5 July 19 9 
Saar eadousals= 20.25 5 July 18 8 
Oy Se abscakone ala ae do....| 5 July 19 9 
10....}.--do...}.-.do.. 5 July 18 8 
ss Nee aC @se a Sa sas Oye eC Ones 8 
12... ./.--do...|.--do:.- fs AINE Knee 8 
Sees eed Osss|s-2G0sss> Scales dor 8 
TAR ees Os. loc -0s- Shay hee dos 8 
Loses doses |eedose. é Hoe Kae 8 
WO sale GOess Gore ae ON ee doa 8 
A emeraleine Gorse |o-- dose. beh) |oe<do.. 8 
Averages......... Ea ical esti ec 8.2 
THE GRAIN BUG. 
from 
July 5 to August 18, 1916. 
=a 3 
: ; oF : : 
Be Wee ce lee | ee, |) 8 las 
° na HO az) Qs an a> 
Se We sues sts) Se hee or eet ele 
a al Fy Fy my? Fy B 
Days. Days. Days. | Days 
July 24 5 Aug. 1 8 Aug.16} 15 42 
--do.. Onan eed ous 8 -do.. 15 42 
July 25 Ge. doze 7 Aug.17| 16 43 
July 24 Gin sescore 8 jAug.16] 15 42 
-do... Maes do: 8 Aug.18 | 17 44 
July 25 7 Aug. 3 9 Aug.17 | 14 43 
HaolOyee 6 Aug. 1 Ul Aug. 16 15 42 
--do.. 7 Aug. 2 8 Aug.17} 15 43 
Tdows: 6 Aug. 3 9 dows il 43 
-do.. 7 --do. 9 |..-do....| 14 43 
(dow Ge PATON ES, Heid one innns 43 
-do.. GM ee sdos 8 Aug.18| 16 44 
July 24 6 Aug. 1 8 Aug.17{| 16 43 
July 25 7 Aug. 3 9 Aug.16} 13 42 
July 24 6 --do...} 10 |Aug.17} 14 43 
Us dOvese lo 7) Gy) | AU eel 8 |Aug.16] 15 42 
July 25 7 Aug. 2 8 Aug.17| 15 43 
A DA Ge cued B22) See MTA ON Na Dag 
Later in the season during a period of cooler weather, from August 
10 to September 30, 1916, the duration of the nymphal stages of 25 
nymphs averaged 7 days for the first instar, 14 days for the second 
instar, and 18 days for the third instar. 
(See Table III.) This 
series of experiments was discontinued on October 3. 
Taste III.—Duration of nymphal instars of Chlorochroa sayi in period from 
Aug. 16 to Sept. 30, 1916." 
No. 
© OND OP WHE 
Nymph First 
hatched. molt 
Aug. 16 Aug. 23 
eC OM arte tera os dows: 
ABAEC Op bee GEnoe dosscs2 
BAC Ko) ae, SAC Koya 
BO same iait a do...... 
SACO Wanda ees Gos 
Pe (5 oe NOUEESe 
NE Ouse ae doles.23 
22 OO nbs Sea eee dora. 2? 
B EO KOR ese beara (a Ko ee 
Raa GOs eels do...... 
SaECOaosaal eee Cosel: 
GSE Ko) aes tetas do......- 
eR Oe east utes dos ae 
Lee Kose foal peer va do.....- 
BE SEOK pease Meee dossse.: 
CON ean POR e285 
BS CLO) oars Sy ae Osos 
BSA O eres so] does. 
SOKO KOS ae do...... 
BR Osis. [et Oz 2822 
HS GEO) Kee as Bee doses 
ee COe se alas GlOsascHe 
BAO OSs a eee do...... 
eae LOSS e sek licjaieie do... 
AV ELAZCS He ise eee bak 
First 
instar. 
Days. 
Second 
molt. 
mn 
(a>) 
uo) 
SreSaes 
NON 
Third 
molt. 
Third 
instar. 
Second 
instar. 
a) ast tts ss st sts 
1Discontinued Oct. 3, 1916. 
