NORTH AMERICAN FRESH-WATER LEECHES. 671 



Var. a, Twia Lake, Minnesota, and Lake Superior — Leidy ; Denver, 

 Col. — Mr. Henshaw, Wlieeler expedition, 1872 ; Yellowstone Lake and 

 Yellowstone River, abundant — Dr. J. Curtis, Wheeler expedition, Aug- 

 ust, 1872; between Santa Fe and Wingate, ISTew Mexico — Dr. Loew, 

 Wheeler expedition ; Kew Haven — A. E. Yerrill. 



Yar. 6, Lake Superior — Leidy ; Fairfield, Utah — Dr. Yarrow, Wheel- 

 er's expedition ; Utah, in a tributary of Great Salt Lake — Mr. Gorman ; 

 Cool Spring, Fire-Hole Basin — Xo. 224, Collection Smithsonian Institu . 

 tion. 



Yar. c, Kew Haven — A. E. Yerrill ; lake near Long's Peak, elevated 

 9,000 feet — Hayden's expedition. 



Yar. d, Springs, Saguache, Colorado — Ernest lugersoll, Hayden's ex- 

 pedition, (also var. b.) 



Democedes Kinberg. 



Ofversigt af Kongl. Vet. Akad. Forhandlingar, xxiii, p. 356, 1867 ; Verrill, op. cit., 

 p. 137, 1872. 



This genus, according to Kinberg, has " three muscular, compressed, 

 edentate maxillse," with the habit of Hirudo. The two species first 

 named by him are from Port Natal, and have 10 ocelli. The remaining 

 species has but 8 ocelli, and is described as follows : 



Democedes maculatus Kinberg. 



Op. cit., p. 356 ; Verrill, loc. cit., p 137, 1872. 



Body tuberculose, with minute tubercles, cinereous, with irregular 

 black and white spots ; cephalic lobe 5- or 6-annulats; ocelli 8 ; fourth 

 pair on the buccal segment; abdominal orifices in the twenty-fifth and 

 thirtieth segments ; segments, 94: ; length, 88'"'". 



Wisconsin — Kumlin. 



Semiscolex Kinberg. 



Op. cit., p. 357, 1867 ; Verrill, Amer. Journ. Scieace, vol. iii, p. 136, 1872. 

 According to Kinberg, this genus has the following characters : max- 

 illa? wanting ; pharynx with a transverse sulcus below the posterior 

 margin of the buccal segment, and below that provided with longitudi- 

 nal sulci ; habit of Hirudo. 



Semiscolex juvenilis Kinberg. 



Op. cit., p. 357; Verrill, loc. cit., p. 136, 



This, the typical species, has a smooth body, with a narrow median 

 dorsal fascia, and a series of spots on each side. Cephalic lobe a little 

 elongated, three-annulate ; ocelli eight, with the fourth pair on the seC" 

 end segment of the body ; abdominal orifice in the twenty-sixth seg- 

 ment ; segments, 97 ; length, 40'"'". 



Montevideo, in fresh water. 



