Platysamia columbia Sm. has not been recorded from southern Ontario nor from Quebec since the beginning of this century. At that time it was recorded as extending from Maine to western Ontario and south to southern Michigan. In 1937, Sweadner (Ann. Carn. Mus., XXV, 167-232) limited the distribution of columbia to include the region east of Winnipeg, Man., the northern shore of Lake Superior, the area around North Bay, Ont., and a small colony in Michigan and a similar one in Maine.

In the same salt meadows north of Bathurst, N. B., where Mr. Brown and I captured the recently described race of Coenonympha inornata (1939, Can. Ent., LXXI, 266) we took a series of specimens of L. dorcas Kby. which on examination, after spreading, appears to constitute an undescribed and rather strikingly different race. The butterflies were by no means common; the first specimens were taken on August 6, evidently freshly emerged, and by dint of careful searching during the next four or five days we were able to capture a series of about 50 specimens.

Studies of stream bottoms as a factor in the abundance of aquatic insects is usually accomplished by random sampling of different kinds of pools and riffles. Various types of apparatus and methods are used. Ludwig (1922) used the hand-dip method in his studies. The Needham trap (1928) has also been used extensively in the study of rocky riffles. Gersbacher (1937) used the Peterson trap (1911) and the Ekman dredge (1911) for sand and mud bottom pools. At present the United States Bureau of Fisheries one foot trap, described by Surber (1937), is very popular in studying riffles.

As noted below the two North American species described in Syndipnus by workers appear to belong in other genrra. In Europe the gunus is represented by nearly a score of species and has been reviewed in recent years by two writers (1, 2). North American collections contain very few representatives of the genus; after combining the material in the National Collection with that from the United States National Museum, the latter kindly loaned to me by Mr. R. A. Cushman, only thirty-seven specimens are available for study.

Head, legs, antennae and ground color of wings ochreous tan in male, straw color in female. Front and palpi in both sexes reddish. The fore wings subfalcate in the male, falcate in the female. T. a. line very faint, narrow, often obsolete at costa, starts one-fifth out from the base on the costa, runs outwardly oblique to the cell, thence curving usually evenly, sometimes slightly wavy sub-parallel to the outer margin, reaching inner margin about one-fifth out.

Male: Palpi dirty cream color; head and thorax clothed with smooth hair, cream white; abdomen cream white; legs cream white; fore tibia bears two long claws and one or two shorter spines on inside, three short claws and a spine on outside.