34 FAUNA OF MAYFIELD'S CAVE. 



Order DIPTERA. 

 Family TIPULIDAE. Crane Flies. 



These shade-loving flies are often found at the mouths of caves. 

 They [have been taken occasionally in Mayfield's near the mouth in 

 twilight, while a few were taken in absolute darkness — one at "11" 

 in November, one at "12" in October, one at "25" in July, and one on 

 the sand beside the stream at "38" just after the freshet in April, 1904. 

 I have seen flies of this family near the mouths of small caves at Bowling 

 Green, Glasgow, and Horse Cave, Kentucky, and also in White's Cave. 

 Blatchley (1896, 188) took a specimen of Ulomorpha pilosella in Porter's 

 Cave. Others have reported Tipulidse from caves. 



These flies are at home in the twilight at the mouths of caves, but 

 those found farther back are probably strays. 



Of those taken in Mayfield's only the following could be determined: 



Trichocera sp. 



Coquillett identified one specimen as belonging to this genus. 



Cladura indivisa Osten Sacken. 



OsTEN Sacken, Proc. Acad. Nat. Sci. Phil. 1861, 291 (New York, Massachusetts). 

 Aldrich, Catalogue N. A. Dip., 1905, 85. 



A specimen of this species was taken on the roof at "12" in October. 



It was doubtless a stray. 



Rhypholophus meigenii Osten Sacken. 



Osten Sacken, Proc. Acad. Nat. Sci. Phil. 1859, 226 (United States and Canada). 

 Aldrich, Catalogue N. A. Dip., 1905, 84. 



A single stray individual was found at "38" in April, 1904. It may 

 have been carried into the cave with debris during the freshet of a few 

 days before. 



Family PSYCHODIDAE. Moth-like Flies. 



Psychoda cinerea Banks. 



Banks, Canad. Ent., xxvi, 330 (New York). Aldrich, Catalogue N. A. Dip., 1905, 

 106 (Eastern and Western United States, British Columbia, and Alaska). 



Taken at bait or other decaying matter in the cave a number of times 

 and often observed upon the roof. It occurs in different parts of the 

 cave but has not been seen nearer the mouth than "9." It breeds in 

 the cave. Bait containing larvae of this species and of Limosina tene- 

 hrarum was brought in during December, 1903, and the adults emerged 

 three and four weeks later. Forty or fifty came out from a piece of 

 decaying meat little larger than the end of a man's thumb. 



Blatchley (1896, 188) records Psychoda minuta Banks from Saltpeter 

 Cave. 



