THE MOUNT DESEIIT KKCION 329 



Bittacomorphella Alexander 



B. jonesi Johns. Long Pond, July 16; foot of Pickett's Mt., 

 July 21. Section 28, July 30. 



Tkiciioceridae. The Winter Crane Flies 



Most numerous in Spring and Autumn when they swarm in 

 the open. Breed in decaying potatoes and the like. 



Trichocera Meigen 



T. hiemalis DeGeer. Corfield, Oct. 



Tipulidae. The Crane Flies 

 Tipulinae 



In 1926 Dr. C. P. Alexander of Amherst, Mass., visited the 

 Island, stopping at Southwest Harbor, and found it "cer- 

 tainly one of the richest and most remarkable faunas anywhere 

 in the world." For that reason, most careful collecting has 

 been done in this family, and Doctor Alexander and our friend, 

 the late Walter H. Harrison, made trips to the Island for 

 several years. They, Dr. Brower and the writer have collected 

 together and separately, our goal being 200 species, for there 

 are but three other restricted areas in the world where that 

 number have been taken. We have reached it, and had some 

 happy days in doing it. The letter (J) is for Johnson, and 

 the other three are represented by their initials. 



In the Occasional Papers of the Boston Society of Natural 

 History, Vol. V, pp. 223-231, January 12, 1937, being part 

 of the second Supplementary List, Doctor Alexander gives 

 many records of species taken on the Island. To combine them 

 with the list below would be confusing, and reference is there- 

 fore made to this paper, particularly because Doctor Alex- 

 ander discusses some of the habitats, which should be read 

 in connection with the listed species. 



