THE WHITEFISHES OF NORTH AMERICA. 



309 



in color, sex, age, or time of run. Usually the fishermen claim that the 

 graybacks run in the spring and that the spring or early summer is their 

 spawning time. The greenbacks and bluebacks run in the late fall and 

 they are a better fish than the graybacks. It is not unlikely that all 

 the fish found spawning in early summer are bloaters (A. prognathus). 

 In lakes Erie, St. Clair, Huron, and Superior the fish is generally known 

 as herring and lake herring, which are the names in use in Canada. In 

 Lake Michigan the names herring, Michigan herring, blueback herring, 

 and shore herring are in use. The name herring is in places shared by 

 another species (A. Itoyi). A trade name for large herring in Lake Erie 

 is ciscoette or siscowet. 



10a. Argyrosomus artedi sisco Jordan. 

 Sisco op Lake Tippecanoe. 



Argyrosomus sisco Jordan, Amer. Nat., ix, 1875, 136, Lake Tippecanoe, Warsaw, Ind. 



Head, 3fto4f; depth, 4 to 5; eye, 4 to 5; snout, about 5; maxillary, 

 3f j mandible, 2£. Scales, 9-74 to 89-8. Gillrakers, 15+28 to 31 (43 

 to 4G), long and slender, 1 to li in eye. This species is not essentially 

 different in form from that of the lake herring, but is smaller and much 

 superior as food. It reaches a length of about 14 inches. It is known 

 only from Geneva, La Belle, and Oconomowoc lakes in Wisconsin, and 

 Tippecanoe, Crooked, Shriner, and Cedar lakes in northeastern Indiana. 

 It lives in deep water except in December, when it comes into shallow 

 water and ascends brooks to spawn. According to Professor Kirsch 

 it spawns from about the 25th of November to the 25th of December 

 in Shriner Lake and the other Indiana lakes. 



The following table gives detailed measurements of four specimens 

 from Crooked Lake, Whitley County, Indiana, which were obtained by 

 Prof. P. H. Kirsch, the Indiana State fish commissioner. 



Table of comparative measurements of specimens of sisco of Lake Tippecanoe (Jrgyroso- 



mus artedi sisco). 



