Lyff' 
[Reprinted from the Proceedings of the Entomological Society of Washington Vol. 21, 
No. 8, November, 1919.] 
NOTES ON THE SEASONAL ACTIVITY OF TABANIDAE 
IN THE LOWER EVERGLADES OF FLORIDA. 
By C. A. MosiER, Warden, Royal Palm State Park, Dade Co., Fla., and 
T. E. Snyder, Bureau of Entomology. 
Since 1916, notes on the seasonal activity of Tabanids in 
southern Florida have been recorded in these Proceedings, es- 
pecially the flight of Tabanus americanus in large numbers at 
dawn. Apparently, species of Tabanus are active during every 
month of the year; this, however, includes belated “stragglers” 
or specimens that emerge very early. 
At Paradise Key, in the Lower Everglades, Tabanus lineola 
was overabundant on the prairies and common in the hammock 
during late July and early August. On the prairie these flies 
were especially common where the land has been farmed and is 
now covered with a heavy growth of weeds and grass — some ten 
feet high. Further into the natural prairie where less or no farm- 
ing had been done, they diminished in numbers until near the 
the seashore there were none. 
On August 30, 1918, Mosier noted that all the saw palmettoes 
(, Seronoa ) from which the leaves had been cut in April and on 
