1916.] NATURAL SCIENCES OF PHILADELPHIA. 545 



discu— id in the second part of this series of papers 18 under the 

 account of Tipula cayuga Alexander. A less detailed notice of the 

 associates taken with the type will be found in the present paper 

 under the account of Limnophila edwardi. 



Family PTYCHOPTERLLX&2. 

 BITTACOMORPHA Westwood. 



Bittacomorpha Westwood; London and Edinburgh Philosophical Magazine 

 and Journal of Science, vol. (i, p. 281 (1S35). 



Subgenus BITTACOMORPHELLA subgcn. n. 



Agrees with Bittacomorpha s. s., but the apical cells of the wings 

 with a sparse, strong pubescence, including the tip of cell Sc, all 

 of 2nd Ri, tips of R 3 , R t , R& and 2nd M; in B. sackeni Roder, the 

 pubescence is even more extensive, including the end of cell C, first 

 Ri, all of cell R 4 , almost the outer half of cells R 3 and R&, and the 

 ends of 2nd M and Cur, metatarsi of the legs not swollen. A cor- 

 related character is the lack of a white ring near the base of the 

 metatarsi. 



Type of the subgenus, Bittacomorpha jonesi Johnson. 



There are four species of this genus now r known, two belonging to 

 each subgenus, and their general distribution, seasonal and geo- 

 graphical, may be summarized as follows: 



Bittacomorpha (Bittacomorpha) clavipes Fabricius. 



The "Phantom Crane-fly" is one of our commonest and best- 

 known species. It is a fly of the Canadian-Transitional to the 

 Austral zones and has a wide range throughout America east of the 

 Rockies, from Ontario, Quebec, New Brunswick, Nova Scotia and 

 Newfoundland south to Florida, west to Manitoba and South Dakota. 

 In New York and New England it is on the wing from May 17 to 

 September 23, being common throughout the summer; in the southern 

 part of its range it appears as early as February. The flies are 

 abundant in low r , wet swales, swamps, and along lakes and ponds. 

 The curious rust-red lava with an extensile breathing tube is as 

 remarkable as the adult fly. 



Bittacomorpha (Bittacomorpha) occidentalis Aldrich. 



Western United States, ranging from Washington to California, 

 the latter records being for mid-May. 



Bittacomorpha (Bittacomorphella) jonesi Johnson. 



A fly of the Canadian life-zone of the northeastern United States, 



18 Proceedings of The Academy of Natural Sciences of Philadelihia, 

 p. 4<S(>, September, 1915. 



