PROC. ENT. SOC. WASH., VOL. 21, NO. 8, NOV., 1919 193 



last year, especially on the lower end of the road to Cape Sable- 

 bey ond Paradise Key. 



[une 4. First appearance of T. melanocerus Wied.; this gadfly 

 was observed only about dusk and dawn they were more nu- 

 merous than last season. T. lineola was plentiful. T. atratus and 

 T. turbidus were only occasionally seen. 



On June 9 near the dredge T. americanus, T. melanocerus, 1 . 

 flams and T. atratus were collected, T, atratus being the most 

 numerous species. 



( )n June 14 the dredge was about Ya m ile from West Lake and 

 two miles from the limit of Bade County line. The 'glades were 

 full of water to the brim and about one mile of the roadway in 

 the glades between here and Homestead was under water. Water 

 was running across the road east and west of the Park where 

 the Tabanid larvae were dug up. The water was waist deep on 

 this date and no more grass grows here than the little that was 

 present in February, when the water had just receded. 



June 10-30 T. flavus was more numerous than in 191N; 7. 

 atratus was more numerous on the prairies but fewer were in the 

 hammock. 



July 10. One adult of T. flavus and two adults of T. melano- 

 cerus were collected on the veranda screen. Adults of Chrysops 

 were numerous at the hammock. 



On July 16 numerous female adults of the small T. costalis 

 Wied. and a few adults of the slightly larger T. lineola were aggre- 

 gated in the windows of stores and garages at Homestead, Florida; 

 customers were very much annoyed by these gadflies. 



July 29. Tabanus melanocerus and T. linoela were very common 

 around stock on the highway, also in pine woods where mules 

 were at work. Chrysops were very numerous and troublesome. 

 The water on the 'glades was high. 



August 9. T. atratus, turbidus and costalis were common. 



On August 15 several species of Tabanids were collected. 



Aug. 23. Heavy rains appeared to increase the number of the 

 Tabanids as more were collected than on Aug. 9 and 15; they were 

 more aggressive both to man and beast. 



By September 8, only an occasional adult Tabanid was to be seen 

 at Paradise Key. At the dredge, southwest on the Cape Sable 

 road, Tabanids were still numerous in the bunk house. 



On Sept. 25-28 T. costalis was the species still aggressive. 



To summarize some species of Tabanus, as americanus and 

 trijunctus, are apparently restricted to a definite season, whereas 

 other species are active throughout the entire year. 



A calendar of the seasonal activity of Tabinidae (H'18 to 1919) 

 in the lower Everglades of Florida is appended. 



