( 35 ) 
***Lateral line on 20 to 30 scales. 
J Head 3f in length ; lateral line not to end of first dorsal ; scales 
smallest, 60 in lat. 1. ; D. IX or X — 9 or 10. Body fusiform, elongated, 
caudal peduncle notably much elongated; size large, life coloration bril- 
liant. Northern Illinois and Wisconsin, eos ( Jordan ), Mss. 
JJHead 3§ in length ; lateral line variously incomplete ; scales rather 
large, in 45 to 50 transverse series, D. IX or X — 12 to 14 , caudal peduncle 
not elongate ; body very short and chubby • size small ; colors dull. 
Georgia to Texas. elegans ( Grd .) 
JJJ Head 4 in length ; lateral line extends to origin of second dorsal ; 56 
transverse series of scales ; D. X or XI — 10 or 11. South Carolina. 
barratti (. Holbr .) 
**** L a teral line unknown ; body compact ; head shorter than in B. 
exilis ; scales smaller ; first dorsal with a band of vertically elongated 
black spots ; DIX — 11, A II, 9. Cannon Ball B. warreni ( Grd .). 
Genus Pleurolepis , Ag. 
9. P. pellucidis, Ag. Sand Darter. Found sparingly in clear sandy 
tributaries of the Wabash and Ohio. ( Jordan .) 
Genus Boleosoma , DeK. 
10. B. olmstedi , ( Stor .) Ag. Tessellated Darter. Specimens are in 
the collection from various localities, and Prof. Forbes informs me that he 
has found it common in all clear streams. Some specimens from Fox Biver 
in Wisconsin show characters exactly intermediate between this and the 
atromaculata, of Girard. Other specimens from the Fox Biver at Geneva, 
111., agree with the description of atromaculata , and others from the same 
locality answer perfectly to olmstedi. 
11. B. brevipinne , Cope. Slim Darter. Apparently everywhere com- 
mon in clear streams throughout the state. 
Genus Etheostoma , Raf. 
12. E. blennioides , Kirt. Black-sided Darter. Bather common in the 
Wabash valley. 
13. E. phoxocephalum , sp. nov. This species replaces the preceding 
in the western part of the state, and from the number of specimens in 
the collection and the localities represented, appears to be rather common 
in the Illinois and its tributaries. 
Bp. Char. Head about 4 times in total length ; depth 6£ ; eyer=snout, 
4| in head ; D. XIII — 12. A. II, 8. Lat. 1.76. Inter-orbital space more 
than 6 in head. Cheeks naked ; opercles scaly ; breast naked. Middle 
line of belly with line of larger scales or a naked strip. Pectorals shorter 
than head. Fins mottled ; sides with a lateral band of small squarish spots 
usually connected by a narrow black line. A black spot at base of caudal 
and one at base of lateral line. 
Back mottled and tesselated with dark on a light ground. A black 
line from eye forward and another downward. This species bears a super- 
ficial likeness to E. blennioides , but may be distinguished at once by the 
