April, ’20] 
SCIENTIFIC NOTES 
259 
Louisiana into other states of all materials and things which are, or would be likely, 
to carry and distribute infestation, and this Association respectfully, but nevertheless 
earnestly and forcefully, urges the Federal Horticultural Board to take such action 
without unnecessary delay and 
Be It Further Resolved, That those in attendance at this meeting as individuals 
and officials pledge to the Federal Horticultural Board and the state authorities our 
whole-hearted and unstinted support in the efforts now being made to eradicate the 
pink bollworm and 
Be It Further Resolved, That it is the unanimous opinion of those assembled 
that the authorities of the several states in the cotton belt should immediately and 
forthwith impose quarantines, effective at once, against the movement into these 
states from the states of Texas and Louisiana of all things and materials which are 
likely to introduce the pink bollworm. 
Scientific Notes 
Butterfly Migrations. Many instances have been recorded of migrations of large 
numbers of butterflies, and the following quotations, taken from the writer’s diary, 
may prove interesting additions to the records: 
“Brownsville, Texas, June 28, 1912. There was a migration of butterflies, Lib- 
ithya bachmanni, over Brownsville yesterday—flying north close to the ground, 
almost against a northeast wind, in spite of-’s theory that insects can migrate 
only with the wind.” 
“July 16. Another migration of butterflies (Libithya) flew over the post today, 
flying almost due east by the thousands. Most of them fly within six feet of the 
ground, the majority closer. They fly at a rate of eight to twelve miles per hour.” 
“July 17. The migration of butterflies continued all day, thousands of them fly¬ 
ing through the streets of Brownsville.” 
“ July 19. Those Libithya butterflies are flying over town thicker than ever today. 
There must be millions of them. I judge from their abundance the larvae must 
live on mesquite or Texas ebony.” 
Unfortunately, definite records of wind direction and rainfall were not kept in the 
diary, as these might have an important bearing upon the time and direction of the 
migrations. But temperature and humidity were recorded, taken from readings of 
thermograph and hygrograph maintained in an insectary. These are briefly shown 
in the following table: 
Max. Tem. Min. Tem. Max. Hum. Min. Hum . 
June 28.... . 88 67 96% 45% 
July 16. 90 73 94% 42% 
17 . 90 73 93% 52%- 
18 . 90 75 94% 53% 
19 . 91 76 94% 43% 
Average for June. 88 74 92% 62% 
July... 89 75 93% 53% 
As seen by the table, there is not enough departure from normal temperature and 
humidity during the days of flight to in any way account for the migrations. 
Another butterfly migration, noted by the writer, took place near La Romana, 
Santo Domingo, on a large sugar estate at the eastern end of the island. As the 
writer left Higueral the morning of March 6, it is not known whether the migration 
lasted longer than the two days. 
