LAMPEEYS AND FISHES OF INDIANA. 213 



NOTROPIS RUBRIFRONS (Cope). 



Rosy faced Minnow. 



Minnilm ruhrifrons, Jordan and Gilbert, 1882, 8, 202. 



Body deeper and more compi'essed than in N. atherinoides. Depth in 

 the length nearly five times. Head narrow, pointed ; in the length four 

 times, the profile with a very gentle curve to lip. Snout about equal to 

 the diameter of the eye, which is contained three and one-half to four 

 times in the length of the head. Mouth large, very oblique, the maxil- 

 lary reaching to a line from the front of the eye. Jaws equal. Dorsal 

 fin, eight; anal, ten. Olive above, the scales with dusky edges. Sides 

 silvery, belly pale. A i'aint or distinct vertebral line. Anterior parts 

 of the males in spring flushed with red, the snout covered with tubercles. 

 Length about two and three-fourths inches. 



N. dilectus (Girard) is sometimes recognized as a species distinct from 

 ruhrit'rona. It differs in having a smaller eye, a shorter and blunter head 

 (four and one-half in the length), and the body more compressed. 



Habitat Ohio Valley. Indiana localities are : Carroll County (23, '88, 

 47) ; Clarke County (23, '88, 56) ; Franklin County (J, No. 2, 6) ; 

 AVhite River at Indianapolis (1, '77, 377); Tippecanoe and Lower Wa- 

 bash rivers (1, '77, 45); East Fork White River, (23, 'Si, 202); St. 

 Joseph's River (4, '88, 154); Kankakee River, at Plymouth (4, '88, 

 156), Fulton and Cass counties (4, '88, 158); Owen County (4, '88, 

 167); Vigo County (16, 94). The reader is referred to 24, '9o, 89, 

 where the localities are given for both X. rubnfrons and JS. dileetm. 



Like its ally, N. atherinoides, this species delights in the clear waters of 

 rapid streams. The assumption of bright colors and the appearance of 

 the tubercles on the head of the male indicate that the season of mating 

 is in the spring. 



NOTROPIS ATHERINOIDES (Raf.). 



Emerald Minnow. 



Minnilus rubellus, Jordan and Gilbert, 1882, 8, 202. 



Form elongated and compressed ; depth in length, five and one-half 

 to sis. Head in length, four and three-fourths ; rather narrow and 

 blunt. Eye large, about three and one-fourth in length of head. Mouth 

 oblique, moderately large, the maxillary reaching the front of the eye ; 

 the jaws equal. Snout equal to eye. Teeth, 2, 4-4, 2, with no masti- 

 catory surface. Dorsal fin situated behind the ventrals. Dorsal rays, 

 eight ; anal, ten or eleven. Scales, 6-40-4. Lateral line somewhat 

 bent downward. Color in life translucent green, the sides silvery, belly 

 pale. Fins all pale. Reaches a length of six inches. Reaches a 

 greater size than rubrifrons and dilectus. Xotropis arge (Cope) 



