116 DIPTERA OF MINNESOTA. 



Fairly good sized flies, with long, very slender legs, the latter 

 characteristic seemingly implied in the family name. Aldrich, in his 

 "North American Diptera" (1904), lists nine genera, containing sixty- 

 four species, but of this number several are of doubtful occurrence. 



Fig. 111. Calobata univitla. Original. 



Calohata univitta, Walk. ; and C. antennipes, Say ; are the only 

 species so far secured by us in this state. We give two typical illus- 

 trations of members of this family. C. antennipes waves its fore 

 feet about like antennae. 



PSILIDAE. 



Moderate sized flies whose larvae, as far as known, live in the roots 

 or galls of different plants. Twenty-four species occur in North 

 America (1904). 



ORTALIDAE. 



A family of about 150 species in North America, characterized in 

 many instances by their grotesque form and by striking wing mark- 

 ings. Minnesota specimens in our collection are brown or gray, 

 with mottled wings. Pyrgota is nearly an inch long, while Rivellia 

 is much smaller. The adult flies are generally found in the long grass 

 of meadows, But little is known of the l^rv??, 



