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NEW CANADIAN EPHEMERIDAE WITH NOTES
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NEW SPECIES OF NORTH AMERICAN EPHEMEROPTERA*
NEW SPECIES OF NORTH AMERICAN EPHEMEROPTERA* BY J. MCDUNNOUGH, Ottawa, Ont. Thraulus albel"tan.us n. sp. Male.-Head and thorax deep black, the· membranous portions of the pleura being slightly tingedExpand
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NEW SPECIES OF NORTH AMERICAN EPHEMEROPTERA IV
In my paper on the nymph of Cinygma integrum (1933, Can. Ent. LXV, 73) there is a rather serious error which I wish to correct. At the time my material was limited to a single nymphal exuvia; nowExpand
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THE EASTERN NORTH AMERICAN SPECIES OF THE GENUS EPHEMERELLA AND THEIR NYMPHS (EPHEMEROPTERA)
This species, described from a single rather imperfect male specimen, was found very abundantly in certain sections of the Knowlton, Que. region in 1929 and 1930, the adults swarming at dusk andExpand
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NEW BRITISH COLUMBIAN EPHEMEROPTERA
During the first week of August, 1938, my assistant in British Columbia, Mr. J. K. Jacob, was fortunate in being able to join a party which was penetrating into the little known and ratherExpand
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NEW NORTH AMERICAN EPHEMERIDAE
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EPHEMERID NOTES WITH DESCRIPTION OF A NEW SPECIES
In my paper on the Ephemeroptera of Covel Hill, Que., I recorded the spccies E. dorothea Needham as extremely common. In the summer of 1927 my assistant, Mr. G. S. walley, took numerous full-grownExpand
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