100 



Genus 45. Phenacobius, Cope. 



76. Phenacobius viirahilis, Grd. 



(Bui. II, 61 ; Phenacobius scopiferus.) 



Oscurs somewhat rarely throughout the State, from Galena to 

 extreme Southern Illinois ; almost invariably in small swift streams, 

 or in the rapid, rocky parts of more sluggish creeks. 



Genus 46. Ericymba, Cope. 



77. Ericymba buccata, Cope. 



We have found this species only in the sandy stretches of the 

 tributaries of the Wabash, where it is locally very abundant. 



Genus 47. Notropis, Raf. 

 Shiners, 



78. Notropis dinemus, Raf. — Emerald Minnow. 



(Bui. II, 60; Notropis rubrifrons, Notropis ^.therinoides : Sjmop., 

 202 and 203; Minniliis rubellus, Minnilus dinemus, Miu- 

 nilus rubrifrons.) 



Excessively abundant ; far commonest northw^ard, but confined 

 everywhere almost strictly to the larger lakes and rivers. Not a 

 single specimen has occurred in our collections from the smaller 

 lakes in Northeastern Illinois, w^hile the waters of Lake Michigan, 

 a few miles distant, were swarming with them along the shore. Not 

 abundant in the Ohio and northern Mississippi, but rather common 

 in the Illinois. From the smaller tributaries of these streams we 

 have not so much as one of this species. In the Wabash and 

 Saline Rivers, in Southern Illinois. 



79. Notropis macrolepidotus, Forbes. 



A very rare minnow, taken thus far only from the Illinois River. 



80. Notropis atripes, Jordan. — Red Fin. 



(Bui. II, 59; Lifthruriis atripes, Lythruras diplcemiiis: Synop., 

 197 ; Minnilus atripes, Minnilus diplamius.) 



This species prefers especially small clear streams, in which it is 

 occasionally abundant ; but, owing probably to the relative scarcity 

 of such waters in Illinois, it occupies a subordinate place among 

 our cyprinoids. It is commonest in the extremes of the State, oc- 

 curring but rarely throughout the central prairie region. 



