Var. distans, Ach.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On bark of beech trees, McKay's woods, Ottawa, Ont, April 16th, 1891. (Macoun.)

Var. minor, Branth.

On limestone rocks, near the Hogsback, near Ottawa, Ont., May 7th, 1897. (Macoun)

202. L. Hageni, Ach.

On rocks, dead wood and trees.

Greenland. (Vahl.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On wood at Ottawa and London, Ont. (A. T. Drummond.) On fence boards, Main Station, Sable Island, N.S., July, 1899; on old logs, Madeline River, Gaspé Co., Que.; on old fence-rails and cedar bark at Ottawa, Ont.; on fence-rails and bark at Belleville, Hastings Co., Ont.; on old logs along Jumping Pound Creek, foothills of Rocky Mountains. (Macoun.) Chilliwack Valley, B.C. (J. M. Macoun.) Cape Lisburne, Alaska. (Rothrock.)

203. L. albescens, (Hoffm.) Fr. Th.

On logs, Chimney Cove, Newfoundland. (Waghorne.)

204. L. atra, (Huds.) Ach.

On rocks and tree trunks,

Greenland. (Arct. Man.) Arctic America. (Richardson.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On trees, old rails and rocks at Ottawa, Ont.; on old rails at Brighton, Ont., 1893; on rocks along Jumping Pound Creek, foothills of Rocky Mountains; on poflar trunks, Sea's farm, near Victoria, Vancouver Island, May 22nd, 1893; on the old wharf at Comox, Vancouver Island, June 23rd, 1893. (Macoun.) Cape Lisburne, Alaska. (Rothrock.)

205. L. atriseda, Nyl.

On rocks, Rofe Cove, Bay of Islands, Newfoundland. (Waghorne,)

206. L. badia, (Pers.) Ach.

On sub-alpine rocks.

Greenland. (Arct. Man.) Battle Harbor, Labrador. (Waghorne.) Arctic America. (Richardson.) Tadousac, Quebec. (A. T. Drum-mond.)

207. L. dispersa, (Pers.) Nyl.

On rocks, Labrador or Newfoundland. (Waghorne fide Eck-feldt.)

208. L. thiodes, (Arnold.) Tirol. xxx, p. 369.

On rocks, Grand Lake, Bay of Islands, Newfoundland. (Waghorne.)

209. L. bicincta, (Ram.) Nyl.

On rocks, Black Islands, Newfoundland. (Waghorne.)

210. L. ochraceo-rubescens, Arnold.

On sandstone rocks, Labrador or Newfoundland. (Waghorne fide Eckfeldt)

211. L. Pacifica, Tuckerm.

On trees on many parts of Vancouver Island.

On poflar trees and alder at Victoria and Comox, Vancouver Island; on small trees at Hastings, Burrard Inlet, B.C. (Macoun.) On bark, Alert Bay, Vancouver Island. (Dr. G. M. Dawson.)

212. L. atrosulphurea, (Wahl.) Ach.

On rocks. Arctic America. Greenland. (Vahl.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.)

213. L. varia, (Ehrh.) Nyl.

Common on trees, dead wood and stones.

Greenland. (Arct. Man.) Labrador or Newfoundland. (Wag-home fide Eckfeldt.) On dead pine, Rigaud Mountain, Vandreuil Co., Que. (Rev. G. Ducharme.) On old rails, Main Station, Sable Island, N.S., July,1899; on old rails, Margaree, Cape Breton Island, N.S., July, 1898; on old rails, bark of trees and boulders at Ottawa,

Ont; on old fence-rails at Belleville, Hastings Co., Ont.; on old rails near Wooler, Northumberland Co., Ont., 1893; on Alnusincana along Jumping Pound Creek, foothills of Rocky Mountains; on young poflars, Sea's farm, Victoria, and on oak trees at Comox, Vancouver Island. (Macoun.)

Var. polytropa, Nyl.

Alpine and sub-alpine rocks.

Arctic America. (Richardson.) Middle Greenland. (Eberlin) On rocks, Labrador and Newfoundland. (Waghorne.) On limestone rocks at Aylmer, Que., April 25th, 1900. (Macoun)

Var. intricata, Nyl.

Alpine and sub-alpine rocks.

Greenland. (Arct. Man.) Arctic America. (Richardson.) On rocks, Chimney Cove, Newfoundland. (Waghorne.)

Var. symmicta, Ach.

On trees and dead wood.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On old fence-rails, Main Station, Sable Island, N.S., July, 1899; on old rails at Margaree and Grand Narrows, Cape Breton Island, N.S., July, 1898; on bark and dead wood by the beach, Gaspé Basin, Gaspé Co., Que.; on old rails and bark of living trees at Ottawa, Ont.; on trees, Nipigon, Lake Superior; on the old wharf at Comox, Vancouver Island. (Macoun.)

Var. saepincola, FR.

On dead wood; common.

Abundant on old cedar rails and boards around Ottawa, Ont.; at Belleville, Hastings Co., Ont.; on the old wharf at Comox, Vancouver Island, June, 1893. (Macoun)

214 L. symtnictera, Nyl.

Goose Arm, Newfoundland. (Waghorne)

215. L. athroocarpa. (Dub.) Nyl.

Trees, rocks and shrubs.

On rocks, Coal Point, Newfoundland. (Waghorne.) British North America. (Richardson.) On beech and maple trees at

Belleville, Hastings Co., Ont.; on poplar bark at Nipigon, Lake Superior; on poflar bark, Fort Chipweyan, Lake Athabasca. (Macoun)

216. L. castanea, (Hepp.) Th. Fr.

Growing over mosses in alpine districts. Greenland. (Vahl.)

21V. L. ventosa, (Linn.) Ach.

Alpine rocks, Arctic America. (Richardson.) Greenland. (Vahl.) On rocks, Fort Chimo, Ungava Bay, Labrador, Aug. 1896. (A. P. Low.) Labrador or Newfoundland. (Waghorne fide Eckfeldt) Summit of Mount Albert, Gaspé Co., Que.; on rocks by the sea at Nanaimo, Vancouver Island. (Macoun.) On rocks, St. George Island, Behring Sea. (J. M. Macoun.) Islands of Behring Strait. (Wright.)

218. L. elatina, Ach.

Dead bark and dead wood of coniferous trees.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) Canada. (A. T. Drummond.) On spruce bark in woods at Baddeck, Cape Breton Island, N.S., July, 1898; on bark of balsam fir, Brackley Point, Prince Edward Island, 1888; on spruce bark, Ste. Anne des Monts River, Gaspé Co., Que.; abundant on hemlock bark, Algonquin Park, Ont., June, 1900; on Menzies' spruce at Comox, Vancouver Island. (Macoun.)

Var. ochrofhaea, Tuckerm.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On old logs, Canaan Forks, N.B., 1892. (J. Moser.) On cedar bark, Tobique River, N.B., 1884. (Geo. U. Hay) On bark of trees, Ste. Anne des Monts, Gaspé Co., Que., Aug., 1882; on cedar bark, Algonquin Park, Ont., June, 1900; on bark of Douglas fir, Comox, Vancouver Island, May, 1887. (Macoun) Sheep Creek, near Juneau, Alaska. (Miss G. Cooley.)