220 PISHES. 



seasons; neck above scaly; D. XIII— 12; A. II, 10. 

 Great Lakes and Western Streams, abundant, E. to L. 

 Champlain ; the largest of the Darters, reaching a length 

 of six or eight inches. (^. zebra, semifasciata, nebulosa, 

 and himaculata of authors.) 



2j p. manitou, Jordan. Manitoit Daetbe. Head 

 notably shorter and broader than in JP. caprodes; mouth 

 smaller and less inferior; fins larger; lateral bars shorter 

 and more blotch like, not meeting their fellows across 

 the back; space in front of dorsal fin entirely naked; 

 D. XV— 14; A. II, 10. Indiana (Lake Manitou) to 

 Wisconsin. 



4. ALVORDIUS, Girard. Black -sided Daeteks, 

 (Etheostoma, Agassiz — not of Raf.) 

 1. A. aspro. Cope & Jor. Black -sided Daetee. 

 BLBinsrY Daeteb. Head long, pointed, 4 in length ; depth 

 6 to 5|-; belly with a series of caducous plates along the 

 middle line (shed at some seasons.) Straw yellow, with 

 dark tesselations and about seven large blotches along the 

 sides, partly confluent, thus forming a moniliform band; 

 D. XIII, to XV-13; A. II, 9. Ohio Valley, Great Lakes 

 and eastward; one of the most curious and elegant of 

 all the Darters. {^A. aspro. Cope & Jor. ? Alvordius 

 and Sadropterus maculatiis, Grd. Etheostoma blen- 

 nioides, Ag.) 



3. A. variafus, (Kirt.) Jor. Shielded Daetee. 

 Head shorter; sides with broad, brownish shades; 

 ventral shields much larger; D. XII — 13; A. II, 9; lat. 

 1. 53. Penn. {E. peltatum, StaufF.) 



3. A. macrocephalus. Cope. Loitg-hbadbd Daetbe. 

 Head much elongated, 3|- in length, the snout much 

 longer than the eye; cheeks and operoles naked; colora- 



