188 PROC. ENT. soc. WASH., VOL. 21, NO. 8, NOV., 1919 



On December 28 and 29, 1918, a few adults of Tabanus atratus 

 were observed on the screen around the veranda of the Lodge. 

 Another adult of this black gadfly was observed on January 24, 

 1919. 



Occasional adults of Chrysops were noted throughout the winter 

 months at Paradise Key. An adult of Chrysops flavidus Wied. 

 was captured on January 27, 1919. 



An adult of the small gadfly Tabanus lineola was observed on 

 the veranda screen on February 4, 1919, at Paradise Key. On 

 February 11, 1919, a few deerflies (Chrysops sp.) flew about 

 Mosier's head while he was walking along the road in the ham- 

 mock at twilight; Mosier killed one on his face. 



The junior author visited Paradise Key on February 17, 1919. 

 One adult of Chrysops flavidus was observed on this day, although 

 the weather was cool. 



On February 19 the first adult of Tabanus lineola seen by the 

 junior author at Paradise Key in 1919 was collected. Female 

 f iults of Tabanus lineola and T. 5 vittatus Wied. were captured 

 on February 20, by the junior author. On the 21st recently 

 transformed adults of this gadfly, both females and males, began 

 to appear in numbers. On this date the live oak (Ouercus vir- 

 giniana) had the leaf buds opening.. 



Digging in the moist muck under saw grass plants (Cladium 

 effusum) in the sloughs of the Everglades, just northeast of 

 Paradise Key, on February 21, the junior author found the larvae 

 of two species of Tabanids; large black striped larvae of T. stygius 

 Say and smaller yellowish white larvae of Chrysops sp. Tabanid 

 larvae are predaceous. 



The muck is deep, at least one foot; the Tabanid larvae are 

 found from one to several inches below the surface. At this 

 date the muck was wet, since water had just receded; the surface 

 of the slough was covered with a film of drying, whitish scum- 

 low plant growth (algae), which floats on the water when the 

 sloughs are flooded. 



On February 23, adults of Chrysops were collected about twenty 

 miles southwest of Paradise Key, near the present termination 

 of the unfinished Ingraham Highway. Early in the morning of 

 February 25, C. A. Mosier took the junior author and H. S. 

 Barber of the Bureau of Entomology, and A. Wetmore of the 

 Biological Survey, from Paradise Key by auto to this point. 

 After regretfully leaving Mr. Mosier, from this point we walked 

 along the rough, unfinished, rocky road bed, to where the dredge 

 was working. This dredge is towed along the canal made by 

 blasting and dredging out material (limestone rock, marl, etc.), 

 for the road. Chrysops and Tabanus lineola were present near 



