592. P. punctiformis, (Ach.) Naeg. & Hepp.

On basswood bark, Central Ontario Junction, Hastings Co., Ont.; on bark, Canfield Junction, Ont.; on maple bark, King's Mountain, Chelsea, Que., and Rockcliffe Park, Ottawa, Ont., 1897. (Macoun.) Labrador or Newfoundland. (Waghorne fide Eckfeldt)

593. p. thelaona, (Ach.) Tuckerm.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On bark of a young white birch along the Rideau River, near the

Hogsback, south of Ottawa, Ont., April 30th, 1897; along the Beaver Meadow, Hull, Que. (Macoun.)

594. p. gemmata, (Ach.) Naeg. & Hepp.

On bark of trees along the Gaspé Coast, Que.; on maple trunks at Ottawa, Ont.; on trunks at Belleville and Central Ontario Junction, Hastings Co., Ont. (Macoun.) On bark, Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.)

595. P. cinerella, (Flot.) Tuckerm.

On maple and black ash bark at Ottawa, Ont., April 19th, 1898. (Macoun.)

596. P. hyalospora, (Nyl.) Tuckerm.

On bark of trees, London, Canada. (A. T. Drummond.) On bark of trees at Belleville, Hastings Co., Ont. (Macoun.)

597. p. patellaraeformis, Eckfeldt.

On young black ash, Billing's bush, Rideau Park, Ottawa, Ont., April 19th, 1897. (Macoun.)

598. p. leucoflaca, (Wallr.) Koerb.

On bark of black ash at Belleville and of maples at Central Ontario Junction, Hastings Co., Ont.; on maple bark in woods near Hull, Que., May 5th, 1897. (Macoun.)

599. p. pithyofhila, Th. Fr.

On blue beech bark, Central Ontario Junction, Hastings Co., Ont., Oct. 24th, 1893. (Macoun.)

600. P. mamillana, (Ach.) Tuckerm.

On bark of trees at Carleton Place, near Ottawa, Ont.; also on trees at Shannonville, Hastings Co., Ont. (Macoun)

601. P. fallacia, Eckfeldt.

On young maple trees at Chelsea, Que., May 15th, 1894. (Macoun)

602. p. nitida, Ach.

On bark, Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme) Quite common on trunks, of beech trees at Ottawa and vicinity; at Belleville and Seymour West, Ont.; on birch trees at Hastings, Burrard Inlet, B.C. (Macoun.)

603. p. glabrata, Ach.

On trees, Labrador or Newfoundland. (Waghorne fide Eckfeldt)

604. p. lactea, Mass.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.)

605. P. nitidella, Mull.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.)