- 8 = 
J. L. King, Moorestown, N. J., reports that. on August 31 a ship- 
ment of 28,741 cocoons of Tiphia asericae Allen and Jaynes was received 
at the laboratory. The general condition of the shipment was good. When 
unpacked 3,091, or 21.1 per cent, of the cocoons were dead, due to fungus. 
The remaining 25,380 cocoons were transferred to vials set in trays and 
olaced in the cold cellar for hibernation. Included in the above ship-— 
ment were 286 cocoons of Tiphia malayana Cameron reared in Japan and Korea. 
Thirty-eight of these, or 13.3 per cent, were dead and the remaining 
cocoons are now held in storage. Since rearing experiments with Tiphia 
malayana, using grubs of Aserica as host, both in Korea and in Japan, 
seemed to indicate possibilities as a parasite of this pest in the United 
States, it was thought advisable to senda sufficient number for experi- 
mental purposes to Moorestown. 
TROPICAL, SUBTROPICAL, AND ORNAMENTAL PLANT INSECTS 
W. BE. Stone, who has been continuing the survival studies of Ana- 
strepha serpentina Wied. begun by Mrs. H. H. Darby at the Mexico City 
laboratory, reports: "The surviving adults * * * reported upon by Mrs. 
Darby prior to July of this year died during the month, the oldest at— 
taining an age of 12 1/2 months. The population, according to Mrs. 
Darby's notes when the experiment was begun, was approximately 29 adults. 
We now have the following species under observation: A. serpentina, 
15 adults over 10 months old; A. striata, 66 adults over 10 months old; 
13 months old. These records substantiate the former records as to the 
longevity of the four important species of Anastrepha obtained at this 
laboratory." 
The symptoms of leafhopper injury to hollyhocks and marigolds ob— 
served on plants in the open have been reproduced experimentally with 
Empoasca fabae Harr. in the greenhouse at Washington, D. C., by F. F. 
Smith. 
The vapor-—sterilization treatments of commercial stocks of bulbs 
at Sumner, Wash., were completed at the end of September by Randall Latta. 
"The total amounts treated during the whole season are as follows: lLab-— 
oratory equipment: 50 treatments, 320 tons; Van Zonneveld equipment: 33 
treatments, 449 tons. * * * At the Van Zonneveld plant the treatment 
of one load was unintentionally continued over a period of 14 1/2 hours. 
* * * The retention of the heat (110° F.) for this period with no in- 
take of steam demonstrated the high quality of the box construction. 
Samples of bulbs from this treatment show no signs of ill effects as yet. 
Root development is apparently going to be satisfactory. No external 
Signs of injury were apparent on September 30 on bulbs treated at periods 
of 4-6-8-10-12 hours at 111° F. on August 17, nor on bulbs treated at 
temperatures up to 115° F. for 4-hour periods on August 29 and 30." 
The fumigation tests with hydrocyanic acid continued during the 
Summer by C. F. Doucette and H. D. Young at Sumner, Wash., "indicate 
very definitely that this gas does not penetrate sufficiently into a 
a al eal lai ican 
