LOUISIANA CIRCULAR No. U. 



on this account it is easily recognized. This species has been taken 

 during the past summer as follows: Logansport, June 25; Negreet, 

 May 19; Cameron, August 23; New Orleans, August 29. A discussion 

 of this species and its habits was given on a previous page. 



TABANUS AMERICAN US Forster (American Horsefly). This Is 

 our largest North American species. It is restricted in its distribu- 

 tion to the southeastern United States. The color is red, the wings 

 are hyaline with a narrow front border which is pure brown. Its bite 

 is severe, but the species dees not usually appear in numbers suffi- 

 cient to make it as serious a pest as some of the smaller species. 

 Specimens were taken at Montgomery, June 29. 



FIG. 17. _ Brown horsefly (Tiihtinnx ln-m-diftu*). f>mnl>. 

 natural size. 



TABANUS BENEDICTUS Whitney (Brown Horsefly). This 

 species was but recently described from specimens taken in Missouri. 

 It is a large species, about the size of 7. /M//, which it resembles 

 somewhat, but the body is dark-brown and the wings are subhyaline. 

 It does not appear to be as abundant as some of the other species, 

 but has been reported as injurious to driving-horses. Taken at Crow- 

 ley. June 17; Montgomery, June 29; Frierson, July 14. 



TABANUS SULCIFRONS Macquart (Autumn Horsefly). This is 

 somewhat smaller in size than the species of ?>./, w .i- named above. 

 The thorax is marked with narrow gray stripes, the abdomen 1 

 dish above, with a median longitudinal row of white I 

 the wings are subhyaline with a number of small brown spot 

 is distributed generally over eastern North America and li 

 most abundant and annoying pests of the Family Tabanidae. 

 one of the late-appearing species, being abundant wh.-n many c 

 species have nearly disappeared. Specimens were 

 September 7 (Newell): Logansport, September 6; Keaohi*. 



made the following observations upon the habits of 

 this fly: 



