9 
received and the parasites liberated in the infested fields, native para- 
sites were already issuing in great numbers. In other words, the 
parasite was already beginning unaided its active work of control. 
By March 27 the “ green bugs” developed winged adults in great 
numbers, and these seemed to drift northward. 
Mr. Ainslie was instructed to look for a region to the northward 
where the “ green bug” was just starting, and he made his first stop, 
March 30, at Wellington, Sumner County, Kans., and found the con- 
ditions there such as to offer a favorable field for experimentation 
with parasites. 
By April 1 the fields about Wellington were generally, though 
sparsely, infested with the “ green bug,” represented in many cases 
by winged females that had seemingly migrated to these fields and 
were giving birth to their young. Lady-beetles were common, but 
none of the Lysiphlebus was observed. After a couple of days spent 
in the vicinity of Wellington, Mr. Ainslie returned to Kingfisher to 
secure parasites for introduction into southern Kansas, but in the 
meantime severe weather, accompanied by heavy frosts, had pre- 
vailed, and the parasites formerly abundant at Kingfisher had become 
exceedingly scarce. By the 5th, however, he began again to find 
very many parasitized “ green bugs,” and by the 7th the parasites 
themselves began to appear again. A bushel of wheat plants, now 
nearly covered with parasitized “ green bugs,” was collected at King- 
fisher and taken to Wellington April 9. At this time fully 12 per 
cent of the “green bugs” at Wellington were already parasitized, 
while on the 12th Mr. Ainslie counted as many as 11 parasitized in- 
dividuals on a single blade of wheat. 
About the middle of March an appeal came to this Bureau from 
the Texas Grain Dealers’ Association, through their secretary, Mr. 
H. B. Dorsey, at Fort Worth, to investigate the “ green bug.” In 
response to this appeal Mr. W. J. Phillips, of the Bureau staff, was 
dispatched to Fort Worth, arriving on the 27th. Several days spent 
in examining fields in the vicinity of Fort Worth demonstrated that 
the “ green bug” had totally destroyed the grain in that vicinity and 
disappeared, and there was no opportunity for experimental work. 
He then went, by instruction, to Hobart, Okla., and later relieved 
Mr. Ainslie at Kingfisher, and, in response to a telegram from Mr. 
Ainslie, sent an amount of parasitized wheat from Kingfisher to 
Wellington equal to or larger than the first shipment. 
All of the material which Mr. Ainslie took with him from Okla- 
homa and that supplied him by Mr. Phillips was placed in a single 
wheat field near Wellington. It is safely estimated, from counts of 
average wheat blades, that upward of two and one-half millions of 
parasites were thus liberated in a single wheat field on April 9, and 
84848—Cir. 95—09 2 
