8O 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. 
MayeSeen sence 39 
May 19....... 6 
May, Zee e ee 23 
May 24 coc. 14 
May 26:..-.-- 16 
Movalsees- 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. 
Mayu Steeceeaace. a ate pe ee et 39 eges deposited. 
bu io Ie Pid Soe fete ees Gees ae 39 eges hatched. 
Ma e2 8 an si ero one ate Meee First larvee made cells. 
Mary Dupree ay ae aboes Mee hee ae First larvee pupated. 
JIM OWES: oases sce eet pie First adults developed. 
CSA a Ne ah cies SE Sok First adults issued from cells. 
ume Se saat oe eee oe cee All adults had issued. 
The stages were: 
Days. 
Uf es alc 2422 ed eh a er PS EE RESTA Penn epee etae oare A IE Noah 5 
Tarvallistages WN. 0Me sel Pere eee seek une oie rere ete eee eee 14 
Pupal stage) 82 ois he a ease Aas xem eh oe ae a et ah ea 5 
Wotalls Qc sce eid is Cate tee Saya he pt ee ee 24 
The larve 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-punctata), 
Mabrotica balteata was by far the most hardy, and this probably 
accounts for its abundance as compared with D. 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. 
