194. L. lentigera, (Web.) Ach.

On earth along the Elbow River, below the Fisher branch, Rocky Mountains, July 12th, 1897; on earth at Morley, Bow River Pass, Rocky Mountains, June, 1885. (Macoun)

195. L. gelida, (Linn.) Ach.

On rocks, Greenland. (Vahl) On boulders near Stewart's Lake, northern British Columbia, June, 1875. (Macoun.) Chernofski Island, Unalaska and Belkofski, Aliaska Peninsula. (Rothrock.)

196. L. rubina, (Vill.) Ach.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) Greenland. (Arct. Man.) On rocks, Arctic America. (Richardson.) Shores of Lake Superior. (Agassiz.) On rocks above Michipi-coten, Lake Superior; on rocks, Lake Nipigon, Ont.; on boulders along the Milk River, Alberta; on boulders along Jumping Pound Creek, and on Moose Mountain, Rocky Mountains, 1897; Bow River Pass, Rocky Mountains; Deer Park, Lower Arrow Lake, Columbia River; on rocks by the sea at Hastings, Burrard Inlet, B.C.; by the sea at Craigflower, near Victoria, and on great boulders between tides at Comox, Vancouver Island. (Macoun.) On rocks, Middleton Island, Alaska. (J. M. Macoun.)

Var. ofaca, Ach.

Greenland. (Arct. Man.) On sandstone rocks, "elbow" of South Saskatchewan, Assa., July 12th, 1879, and on rocks, Wood Mountain, Assa., June 12th, 1895. (Macoun.)

197. L. muralis, (Schreb.) Schaer. var. saxicola, Schaer.

Greenland. (Arct. Man.) On rocks, Grand Lake, in the Bay of Islands, and on wood at Chimney Cove, Newfoundland. (Waghorne.) On rocks, Ste. Anne des Monts River, Gaspé Co., Que., Aug. 18th, 1882; quite common on boulders around Ottawa, Ont., and at Chelsea and King's Mountain, Que. (Macoun.) Cliffs on St. Matthew Island, St. Paul Island, Sitka, Unalaska and elsewhere in Alaska. (Rothrock.)

A specimen collected June 7th, 1897, on St. George Island, Behring Sea, by Mr. J. M. Macoun is referred here, but is more likely a new species, as suggested by Branth.

Var. Garovaglii, Anz.

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

Var. versicolor, Fr.

On rocks, Leading Tickles, Newfoundland. (Waghorne.)

198. L. pallida, (Schreb.) Schaer.

On trunks of trees and fence-rails, not uncommon.

Arctic America. (Richardson) Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On trunks of trees, Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.) On bark of trees at Baddeck and Margaree, Cape Breton Island, N.S., July, 1898; on bark of trees at Truro, N.S.; on basswood bark, Dow's Swamp and other places around Ottawa, Ont.; on young pine trees at Carleton Place, Carleton Co., Ont.; on bark of trees, Central Ontario Junction, Hastings Co., Ont.; on tree-trunks around Niagara Falls, Ont., May 14th, 1901; on bark of maple trees, Algonquin Park, Ont., July, 1900; on bark of trees, Nipigon River and Lake, Ont.; on bark of Alnus rubra, Hastings, Burrard Inlet, B.C. (Macoun.)

Var. cancriformis, Tuckerm.

On large trunks in woods, McKay's Bush, Ottawa, Ont.; on trunks of beech trees at Belleville, Hastings Co., Ont. (Macoun.)

199. L. sordida, (Pers.) Th. Fr.

Greenland. (Arct. Man.) On rocks, Arctic America. (Richardson.) Labrador or Newfoundland. (Waghorne fide Eckfeldt) Summit of Mount Albert, Gaspé Co., Que., August 26th, 1882; on rocks, Wood Mountain, Assa., June 12th, 1895. (Macoun) South Fowl Lake, boundary between Minnesota and Ontario, 1897. (Fink.)

200. L. frustulosa, (Dicks.) Mass. On rocks, Greenland. (Vahl.)

201. L. siibfusca, (Linn.) Ach. var. allofhana, Ach.

Greenland. (Arct. Man.) Labrador and Newfoundland. (Waghorne fide Eckfeldt.) On trees, Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme) On beech trees at Edmonton, Ont. (James White.) On aspen poflar, Greenwood Township, Man. (Thos. Walker.) On old fence boards and logs, Sable Island, N. S., July, 1899; common on trunks and old logs at Baddeck, Grand Narrows and Margaree, Cape Breton Island, N.S., July, 1898; on bark of trees at Truro, N.S.; on drift wood by the sea, Jupiter River,

Anticosti, Que.; very abundant on large trunks of beech, maple and basswood, and on old rails at Ottawa, Ont.; on small trees at Aylmer, Que.; abundant at Belleville, Hastings Co., Ont.; common on trunks, Algonquin Park, Ont., June, 1900; on bark of trees, Nipigon River, Ont.; on trees along Lake Winnipegosis, Man.; on sandstone rocks, Wood Mountain, Assa., June 10th, 1895; on bark of poflar, Jumping Pound Creek, Rocky Mountains; on trees along the Columbia River at Revelstoke, B.C.; on alders along the Nechaco River, B.C.; on the old wharf at Comox, Vancouver Island. (Macoun) Cook's Inlet, Unalaska, and Port Clarence, Alaska. (Rothrock.)

Var. hypnorum, Schaer.

Labrador or Newfoundland. (Waghorne fide Eckfeldt) Along the Mackenzie River and around Great Bear Lake. (Richardson) On earth and moss at Banff, Rocky Mountains, July nth, 1891; on earth, Jumping Pound Creek, at the bridge, and along Bragg's Creek, foothills of Rocky Mountains. (Macoun.) Port Clarence and Cape Lisburne, Alaska. (Rothrock.)

Var. argentata, Ach.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On maple bark at Cove Head, Prince Edward Island; on trees at the base of King's Mountain, near Chelsea, Que., May, 1897; on bark of young poflar trees, Nipigon River, Ont.; on young trees, Sea's farm, near Victoria, Vancouver Island. (Macoun.)

Var. coilocarpa, Ach.

On ash trees at Baddeck, Cape Breton Island, N.S., July, 1898; on beech bark in woods around Ottawa, Ont.; on bark of Alnus incana at Jumping Pound Creek, Rocky Mountains; on poflar bark, Sea's farm, near Victoria, Vancouver Island, May 22nd, 1893. (Macoun.)

Var. atrynea, Ach.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On fences near the sea, Sable Island, N.S., July, 1899; on ash bark, Gaspé coast, August, 1882; on old logs by the sea, Oak Bay, near Victoria, Vancouver Island, June, 1887. (Macoun.) On logs by the sea, Hanson Island, Gulf of Georgia, B.C., 1885. (Dr. G. M. Dawson)