McAtee and Weed — Fishes of Vicinity of Pluvimers Island, Md. 13 



caught in Sycamore cove, September 18, 1910, contained caterpillars of 

 Hcterocampa manteo and Ceratomia amyntor, and an adult locustid, 

 Scudderia furcata. 



Lepomis solis (Cuvier and Valenciennes). — Bean and Weed (p. 173) 

 comment on the status of solis and state that it probably should stand as 

 a separate species. If recognized as anything more than a variety, it 

 will have to so stand as it occurs with auritus under conditions where 

 the two forms could not breed true, except for the intervention of a 

 physiological difference sufficient to prevent cross-breeding. A case in 

 point is the colonies of sunfishes in pools on a rocky headland just below 

 Difficult Run. The abundance of Lepomis in these water pockets is such 

 that we may say they are saturated with sunfishes. Gibbosus, cyanellus 

 auritus and solis occur here and one is as recognizable and distinct as the 

 other. Chaenobri/ttus gulosus, however, seems to hybridize with all. 



Lepomis gibbosus (Linnaeus). — Punkin seed. Abundant in the 

 river, canal, and in the pools above mentioned, and occasional in the 

 mouths of creeks. 



Micropterus dolomieu (LacepMe). — Black bass. Introduced, common 

 in the river, sparingly distributed in the canal. 



Micropterus salmoides (LacepMe). — Introduced. The only definite 

 record for our region is a capture on hook and line in the Plummers 

 Island channel, September 13, 1911. 



Percid^. 



Perca flavescens (Mitchill). — Yellow perch. Ring perch. Occurs 

 in both the canal and river, sometimes rather commonly in the latter. 



Stizostedion vitreum (Mitchill). — One specimen was caught in the 

 river April, 1913. 



Boleosotna olmstedi (Storer). — Abundant and almost omnipresent. 

 Darters as a rule are lovers of rocky riffles and swift currents, but this 

 species is often found on mud bottom in deep pools and in canal locks. 

 Specimens taken in Rock Run March 17, 1912, appeared to be nearly 

 ready for spawning. 



Boleosotna effulgens (Girard). — Recorded by Smith and Bean from 

 Little Falls and as it occurs in the rapids themselves it fairly belongs in 

 our list. 



Etheostoma flabellare (Rafinesque). — Not uncommon in Rock and 

 Cabin John Runs. 



SeRRANIDjE. 



Roccus lineatus (Bloch). — Striped bass. This species ascends the 

 river to Great Falls. A few small specimens have been caught on hook 

 and line in the vicinity of Plummers Island. 



Morone americana (Gmelin). — White perch. The white perch runs 

 up the Potomac as far as Great Falls. The main run occurs in spring 

 but individuals linger in our waters and they may be captured at almost 

 any season. We have collected this species both in the river and the 

 canal. 



