NOETH AMERICAN FRESH-WATER LEECHES. 671 



Yar. a, Twin Lake, Miimesota, and Lake Superior — Leidy ; Denver, 

 Col. — Mr. Henshaw, Wlieeler expedition, 1S72 ; Yellowstone Lake and 

 Yellowstone River, abundant — Dr. J. Cnrtis, Wlieeler expedition, Aug- 

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

 "Wheeler expedition ; New Haven — A. E. Yerrill. 



Var. b, 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 — No. 224, Collection Smithsonian Institu. 

 tion. 



Var. c, New Haven — A. E. Verrill ; lake near Long's Peak, elevated 

 9,000 feet — Hayden's expedition. 



Var. d, Springs, Saguache, Colorado — Ernest Ingersoll, Hayden's ex- 

 pedition, (also var. h.) 



Democedes Kinberg. 



Ofversigt af Kougl. Vet. AkacT. 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 Rirudo. Tlie 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-annulate; ocelli 8 ; fourth 

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

 thirtieth segments ; segments, 94 j length, 88™". 



Wisconsin — Kumlin. 



Semiscolex Kinberg. 



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

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

 illte wanting ; pharynx with a transverse sulcus below the posterior 

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

 nal sulci ; habit of Hiriulo. 



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 fourtli pair on the sec- 

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

 ment ; segments, 97 ; length, -10""". 



Montevideo, in fresh water. 



