80 SOME INSECTS INJURIOUS TO TRUCK CROPS. 
The record for the pair which mated April 30 is as follows: 
Record of egg deposition of a single female of Diabrotica balteata, 
which mated April 30, 1909.4 
Number 
1909. of eggs. 
Mayi8ie.2.-- 39 
May 19....... 6 
May 2162 35-5 23 
May 24....... 14 
May 26... 2-2. 16 
Total..... 98 
@ May 31, male died; June 2, female died. 
This gives a total of 98 eggs from one female. The life of the 
male was 43 days and that of the female 45 days. 
The record for the 39 eggs deposited May 8 is as follows: 
Detailed record for the 39 eggs of Diabrotica balteata deposited May 8, 1909. 
Maes vactet a ae eee ae 39 eges deposited. 
1 Ch pal ba a Bee Sania ag gr 2 39 eggs hatched. 
JE 5 5) ed eps abba 5 ae WR pee gE First larvee made cells. 
May Dies alice son eee ie First larvee pupated. 
iuime IR ee ere eaten SAS REN Se eas he First adults developed. 
SURG AEE ae eyes arte ene ee op ee First adults issued from cells. 
BINS G "Aeros re chiar es cates We crore All adults had issued. 
The stages were: 
Days. 
Mee stages. ois. Sickie Los eet tle otle aknom cae oe. ct 5 
harvall Stag ease at se cla aie. bel yee Mamet uae ete Pc ee 14 
Bupalistage cu. sot hecs eae Ae te ge Ae ae ae eee oe 5 
Potal. cent. ya ese ee eee ae toy 24 
The larvee of this species were confined in large jelly glasses and 
in large vials and fed with sections of sorghum cane. Of the three 
species reared (Diabrotica balteata, D. vittata, and D. 12-punetata), 
INabrotica balteata was by far the most hardy, and this probably 
accounts for its abundance as compared with LD. vittata and D. 
12-punctata. 
Records showed that one lot matured March 1, a second April 18, 
and a third June 1. Mr. McMillan found the beetles in greatest 
abundance during November and December. Judging from this and 
from the rearing records, there may be at least six generations, and 
probably one or two more each year. 
Occasional mutilated beetles were found lying on cucurbit and 
other leaves and had evidently been killed by some predaceous 
insects. Many specimens dissected during May showed no internal 
parasites. 
The temperatures at Brownsville during January, February, and 
March ranged from a minimum of 29° F. to a maximum of 95.1° F. 
