48. T. chrysofhthalmus, (Linn.) Norm.

On trees and fence-rails along large bodies of water.

On trunks along Lake Ontario at Wellington Beach and Presqu'ile Point; on fence-rails, Port Rowan, Lake Erie; on trees, Pelee Point, Essex Co., Ont., May 27th, 1901; on trees, Lake Winnipegosis, Man. (Macoun.)

Var. flavicans, Wallr.

Coast of Newfoundland. (Nylander.)

49. T. parietinus, (Linn.) Norm.

On trunks and stones near large bodies of water. Newfoundland, 1826. (Pylaie.) Shores of Lake Superior. (Agassiz.) Very abundant on roofs of houses and old board fences, Sable Island, N.S., July 27th, 1899; on trees, Presqu'ile Pointy Lake Ontario; on stones along Lake Winnipegosis, Man. (Macoun.)

50. T. polyearpus, (Ehrh.) Tuckerm.

On trees, dead wood, fence-rails and old boards.

On bark, Turner's Head, Labrador. (Waghorne.) On Rigaud Mountain, Vandreuil Co , Que. (Rev. G. Ducharme.) On trees at Campbellton, N.B.; dead wood, Jupiter River, Anticosti; on spruce twigs at Grand Narrows, and abundant on old fence-rails, Big Intervale, and on "fish flakes" McNeill's Harbour, Cape Breton Island, N.S., July, 1898; on bitter-nut hickory trees, at Belleville, Ont.; on trees, Red Rock, Nipigon Bay, Lake Superior; abundant on trees at Winnipeg and Stony Mountain, Man.; on trunks, Red Deer River, LakeWinnipegosis, Man.; on poflar trees, Moose Mountain, Assa. (Macoun.) On scrub oaks, Greenwood, Man. (Thos. Walker.) On maple and elm trees at Edmonton, Ont. (James White.)

51. T. lychneus, (Nyl.) Tuckerm.

On trees and stones and old fence-rails.

Greenland. (Branth) On oak bark, High Park, Toronto, 1901; on cedar bark, Pelee Point, Essex Co., May 27th, 1901; abundant on choke-cherry trees, Old Wives' Creek, Assa., May, 1895; on old cedar fences at Hastings, Burrard Inlet, B.C.; on old fence-rails at Cadboro Bay and Comox, and on poflar trees and dead wood at Victoria, Vancouver Island. (Macoun.) St. Paul Island, Behring Sea. (J, M, Macoun.) On rocks, islands in Behring Strait. (Wright.) Alaska. (Dr. Kellogg.)

52. T. concolor, (Dicks.) Tuckerm.

On trees and rocks.

On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.) Abundant on black ash trunks in McKay's woods and other places at Ottawa, Ont.; on basswood trunks at Carleton Place, Carleton Co., Ont.; and on basswood and ash trees, Seymour West, Northumberland Co., Ont.; on trees at Hastings, B.C., April, 1889. (Macoun.)