74 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Table showing variation in the number of rays in the anal fin in Leuciscus balteatus. 
14. Rutilus bicolor (Girard). 
Numerous specimens obtained in a slough at Pelican Bay and others at the south end of Upper 
Klamath Lake. Some were caught in a gill net, others in a small dip net, such as is used by Klamath 
Indians; a few were taken on a set line, but the majority were obtained by means of a small seine, in 
small sloughs or lagoons at the south end of Upper Klamath Lake. It seems to be one of the most 
abundant species occurring in the lake. The largest measure about 9 inches in total length. There 
does not appear to be much variation in the number of scales or fin rays, or in proportional measure- 
ments, as is shown in the following table. The Indians use this species for bait when fishing for 
trout near Klamath Falls, the average length of those thus used being about 4 inches. It is caught 
in large numbers in dip nets in the edge of the tules. This species is figured on page 8 of this Bulletin. 
Table showing variation in 13 specimens of Rutilus bicolor from Upper Klamath Lake, Oregon. 
15. Rhinichthys dulcis (Girard). 
One specimen from Wallowa Lake. The origin of the dorsal is midway between tip of snout and 
base of caudal peduncle. 
16. Agosia klamathensis, new species 
Type No. 48225, U: S. N. M. ; cotypes No. 5704, L. S. Jr. Univ. Mus. and No. 451, U. S. F. C. 
Type locality at mouth of the small creek which flows into the arm of Upper Klamath Lake called 
Pelican Bay, where numerous specimens were collected November 3, 1896, by Dr. Seth E. Meek and 
Mr. A. B. Alexander. Length of type 2\ inches, measured to last caudal vertebra. 
Close to Agosia nubila. 
An examination of a large series of specimens of Agosia from Upper Klamath Lake and a comparison 
of them with specimens of A. nubila from various localities show the fish from this lake to possess certain 
characters which serve to distinguish it from typical A. nubila. While the differences are slight, they 
are plainly evident and must be recognized, and we therefore describe this form as a new species. 
Head 4; depth 44 ; eye 44 in head; snout 34. D. i, 8; A. i, 7; scales about 14-78-10 (average, 73 
in 49 specimens). 
