The cisco, or so-called "lake-herring," was first described by the French ichthyologist, Le Sueur, in 1818, from Lake Erie and the Niagara River. He named it in honor of Petrus Artedi, the associate of Linnæus, and the "Father of Ichthyology." The variety _sisco_ was described and named by Dr. David Starr Jordan, in 1875, from Lake Tippecanoe, Indiana. It was for a long time supposed to exist only in Lake Geneva. Wisconsin, except in the Great Lakes, and an absurd opinion was prevalent that there was an underground communication between that lake and Lake Superior by which the cisco entered it. Soon after Dr. Jordan had discovered it in Tippecanoe Lake I found it in several lakes in Wisconsin, as La Belle, Oconomowoc, and Okauchee. The cisco is somewhat smaller than the lake-herring, but otherwise it is about the same. It is almost elliptical in outline, the body being compressed. The mouth is rather large, with the jaws more projecting than in the lake white-fishes. The coloration is bluish or greenish on the back, with silvery sides and white belly. The scales are sprinkled with black specks. It is a very pretty fish, is gregarious, swimming in large schools, and feeds on the minute organisms found in lakes of good depth. It remains in deep water most of the year, but resorts to shallower water in the summer, preparatory to spawning. From the last of May to June, when the May-fly appears in vast swarms on the western lakes, the cisco approaches the surface to feed on them. It is at this time that they take an artificial fly of a grayish hue. It grows to a length of ten or twelve inches, and is highly esteemed as a food-fish. At Lake Geneva, when the May-fly appears, crowds of anglers assemble to cast the artificial fly and the natural "cisco-fly," as the May-fly is called. A very light trout fly-rod with corresponding tackle can be utilized for cisco, with gray hackle, gray drake, or green drake, on hooks Nos. 8 to 10. The fishing is done from boats or the shore. In using the natural fly the same sized hooks mentioned will answer. As the May-fly alights on every object, the boat and clothing of the angler as well, the supply of bait is constant and convenient. The cisco can be caught in winter, through the ice, in water from fifty to seventy-five feet deep, and many are taken in this way from the lakes near Oconomowoc, Wisconsin. A small white or bright object is used as a decoy to attract the fish, which is kept in motion near the baited hook, and on a separate line. The bait may be a very small bit of white bacon or ham fat, or fish flesh, though insect larva is better.