172 The Ohio Journal of Science [Vol. XXI, No. 5, 



larvae. Many were found in the tiny brown cases which 

 Tanytarsus builds. Some of these were attached to dead leaves 

 on the bottom, but more of them to stones, particularly those 

 from parts of the large pond. From even the very incomplete 

 records of distribution there, it w^ould seem that unquestion- 

 ably this was a very abundant species in the large pond. 



Cricotopus trifasciatus Panzer. This species was fairly 

 common at best and seemed rather evenly distributed. 



Orthocladius sp. This kind, also not identifiable to species, 

 was common, in fact at station 12 it was abundant. 



Family Stratiomyidce. 



Stratiomyia sp. (?). Only one larva of a soldier fly was 

 found, and that in the vegetation near the surface at station 13. 

 The rarity is surprising. It was far from full grown and could 

 not be fully identified but probably belongs to this genus. 



Family TabanidcB. 



Chrysops sp. (?) One small, white larva not full grown, 

 belonging to this genus evidently, was found at station 13. 



Tabanid sp. Two other very small white larvse not def- 

 initely identifiable to genus, were the only other members of 

 this family found. 



A Tabanid egg, mass was found about four inches above the 

 water's surface on an upright emergent broad blade oi grass, 

 a foot from shore, in the vicinity of station 8. 



Family SciomyzidcE. 



Tetanocera plumosa Loew. This species of fly was of rare 

 occurrence. Two adults bred out in the laboratory October 1, 

 from their short, thick, cylindrical pupal cases which had been 

 collected at station 3, vSeptember 20. 



Tetanocera umbrarum Linn. This related species, also rare, 

 was represented by only one specimen bred out June 13, from 

 a pupa found at station 3, June 5. 



Family EphydridcE. 



The minute flies of this family .represented here were all 

 bred out in the laboratory. No larv« were observed or found. 

 They were in the pupal stage when collected. 



Notiphila sp. One specimen only of this genus was secured. 

 Hence it was rare. This accidentally bred out from a lot of 



