40 
and on the Bel of June, flaxseeds were sent me from Macoupin 
county. June 12th, flaxseeds occurred in rye near Granville, Put. 
nam county, and on the 26th they were found upon the bases 
of fallen stalks of wheat in fields near Warsaw, in Hancock county. 
On the 29th and BOfch flaxseeds still unhatched, containing living 
larvae, occurred in fields at Godfrey, in Madison county, and near 
Jerseyville; and on the 4th of July they were found in the ripened 
fields of wheat and in stubble at DuQuoin, in Perry county. 
Careful sweeping of the infested fields at Warsaw, Jerseyville and 
DuQuoin. yielded no adults. At Effingham, on the 7th, great num¬ 
bers of the flaxseeds, some of which were demonstrated to contain 
living larvae, were found on the stubble, and also upon the stand¬ 
ing grain where harvesting was in progress. In badly infested fields 
they collected upon the platforms of the harvesters in surprising 
numbers. At Anna, in Union county, on the 9th, the flaxseeds 
were also noticed in the stubble, and at Villa Ridge, still further 
southward, specimens were obtained at the same date, which after¬ 
ward yielded the adult insect in our breeding cages. On the 20th 
July I made an examination of flaxseeds collected at DuQuoin on 
the 4th of that month, and found the larvae in them still living, and 
not yet pupated. Some of these living larvae were dissected, and it 
is certain that they had not been parasitized. On the second of 
August, at Anna, careful and long continued sweeping of the fields 
failed to procure any of the imagos. On the 5th August flaxseeds 
were again obtained from fields in DuQuoin, and on the 7th of that 
'month others were sent me from the same locality which contained 
living larvae, although many of them were empty shells, from which 
parasites had already escaped. 
On the 6th September I received from an assistant in the field 
about fifty flaxseeds collected at Centralia, which I carefully exam¬ 
ined. All but six of these were empty shells, and only one con¬ 
tained a demonstrably living and active larva. Three at least of 
the other five were dead, while the other two were soft and possi¬ 
bly living, but if so, dormant. 
In sweepings sent from wheat stubble near DuQuoin, which had 
been previously infested by the fly, the adult insect was at this time 
found very sparingly indeed. Our next observations in this year 
were made Dec. 9, at Anna, where larvae and flaxseeds were abund¬ 
ant, and on the 27th of that month their, occurrence at Albion, m 
White county, was noted by a correspondent of the office. 
1884. 
Commencing April 9 of the present year the occurrence of flaxseeds 
was reported from Marshall county by a correspondent of the office, 
and on the 19th of May young larvae, some of which were but a few 
hours hatched, were found by Mr. John Marten, a former assistant oi 
my predecessor, Dr. Thomas. On the 21st of this month, larvae 
were collected at Marshall by an assistant, which, kept in breeding 
cages at the ordinary temperature of the air, yielded adult flies on 
the 20tli of June. On the 25th of May both larvae and llav- 
seeds were obtained at Robinson, Crawford county, and on the Id 
at Mount Carmel. Flaxseeds were found at Carmi and Eldorado 
