210 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Tabanus trijunctus Walker, Hobe Sound, Jupiter Island, Florida, May 11 

 and 17, 1916; West Palm Beach, Florida, May 11 and 17, 1916; Miami 

 Beach, Florida, May 11 to 16, 1916. 

 Tabanus lincola Fabr., Miami Beach, Florida, May 11 to 16, 1916; Hobe 



Sound, Florida, May 17, 1916. 

 Tabanus mexicanus Linne., Hobe Sound, Jupiter Island, Florida, May 



17, 1916, flying 9.30 p.m., C.T. 



Tabanux atralus Fabr., Buena Vista, Florida. (C. A. Mosier, collector.) 

 Tabanus fronto O. Sacken, Buena Vista, Florida. (C. A. Mosier, collector.) 

 Tabann* binlici Whitney, Buena Vista, Florida. (C. A. Mosier, collector.) 

 Diachlorus ferrugatuK Fabr., Buena Vista, Florida. (C. A. Mosier, col- 

 lector.) 

 Chrysops brunneus Hine, Miami Beach, Florida, May 12, 1916. 



In discussion Mr. Knab said that the great abundance of Tab- 

 anidae in a region like Florida, where the larger mammals were 

 generally scarce, is most remarkable, since the females of this 

 family are supposed to be blood-suckers without exception. It 

 would seem that in a region like Florida only a small proportion 

 of these flies could satisfy their appetite for blood. 



Mr. Schwarz stated that Tabanus psammophilus 0. S., discovered 

 by Mr. Hubbard and himself, occurred only on open beaches. 

 They found it at Indian River Inlet, and afterward as far south 

 as Biscayne Bay. It rests upon the moist sand, and being of the 

 same color is observed with difficulty. As no mammals occur 

 on these beaches, and as the flies never occur elsewhere, this 

 species must have peculiar feeding habits. 



Mr. Knab spoke of a species of Tabanus, possibly the same as 

 the one just discussed by Mr. Schwarz, which he found on a 

 sandy beach near Nassau, Bahama Islands. When frightened it 

 would fly in the manner of a Cicindela, but under no circumstances 

 leave the beach. As mammals were originally almost absent 

 from the Bahamas, it seems certain that these Tabanus subsist 

 on other food than the blood of warm-blooded animals. 



Mr. Knab, referring to Mr. Snyder's use of the term "sand 

 flies," said that this should never be employed by an entomolo- 

 gist. The name is both indefinite and misleading, since it is 

 applied to widely different insects in different localities. 



Mr. Walton stated that some local Tabanidae are apparently 

 not attracted to warm-blooded animals at all. One, especially 



