In the many small lakes near Oconomowoc. Wisconsin, the yellow-perch thrives well. It is caught in the summer by men, women, and children with almost any kind of bait, and often with the rudest tackle. To the summer visitors it is a source of perennial delight, and an unfailing means of enjoyment to the juvenile anglers. In my day, Genesee Lake, a few miles from Oconomowoc, contained some of the largest perch of all the numerous lakes and lakelets. In this lake only the small-mouth bass and yellow-perch were found, no large-mouth bass or pike, and the bass and perch were of about the same size--two pounds. This uniformity of weight did not obtain in any of the other lakes. A basket of perch from Genesee Lake was a handsome sight, and the fish were unusually sweet and savory. During the winter the residents catch yellow-perch through holes cut in the ice in great numbers, in all of the lakes mentioned. It was here that I devised my "Oconomowoc" bass fly with creamy yellow body, hackle of hairs of deer's tail, cinnamon (woodcock) wings, and tail of ginger; but for the perch of Genesee I found that with a tail of scarlet wool it was more effective. Many a two-pound perch responded to that lure, in days long gone, and as Thoreau says, "It is a true fish, such as the angler loves to put into his basket or hang on top of his willow twig on shady afternoons." CHAPTER VI THE GRAYLING FAMILY (_Thymallidæ_) _Thymallus signifer._ Head 5-1/2; depth 4-2/3; eye 3; D. 24; A. II; scales 8-88 to 90-11; coeca 18; body elongate, compressed, highest under the anterior portion of the dorsal; head rather short, subconic, compressed, its upper outline continuous with anterior curve of the back; mouth moderate, the maxillary extending to below the middle of the eye; maxillary 6 (?) in head; jaws about equal; tongue, in the young, with teeth, which are usually absent in the adult; eye quite large, rather longer than snout; scales moderate; lateral line nearly straight; a small bare space behind isthmus; dorsal fin long and high, about 3-1/2 in length of body; adipose fin small; anal fin small; gill-rakers short and slender, about 12 below the angle. _Thymallus tricolor._ Head 5; depth 5-1/2; eye 4; D. 21 or 22; A. 10; scales 93 to 98; gill-rakers 7 + 12; maxillary 2-1/2 in head; dorsal fin 5-1/2 in length of body. Otherwise much as _T. signifer_. _Thymallus montanus._ Head 5; depth 4-1/2; eye 3-1/2; D. 18 to 21; A. 10 or 11; scales 8-82 to 85-10; gill-rakers 5 + 12; maxillary 3 in head; dorsal fin 4-1/2 in length of body. Other features much resembling _T. signifer_ and _T. tricolor_.