1917.] NATURAL SCIENCES OF PHILADELPHIA. 121 



All shoAv a dark streak oliliquely over the opercle. The maxillary 

 is always shorter than in the figure by Jordan and Evermann,^ usualh' 

 reaching two-thirds to eye. Other examples in the Academy from: 

 Sparrow Lake, Ontario; Lake Superior; Cherokee, Iowa; La Points, 

 Wisconsin, and tributary of Lake Ontario. 



Apeltes quadracus (Mitchill). 



Little Lehigh River. 



Ambloplites rupestris (Rafinesque). 



Wister Lsland. 

 Xepomis auritus (Linng). 



Bangor, Souderton, Swamp Creek, Emaus, Lanark, Helfrich's 

 Springs, Elk View, West Branch of Elk Creek and Shady Nook. 



Pomotis gibboSUS (Linne). 



Swamp, Indian and Jordan Creeks, Pennsburg, Hosensack, 

 Lanark and Joanna. 



Micropterus dolomieu Lac6pede. 



Silver Spring, Hosensack and New Tripoli. 



Micropterus salmoides (Lac6p§de). 



Jordan Creek, Hosensack and Souderton. 



Perca flavescens (Mitchill). 



Hosensack. 

 Hadropterus peltatus (Cope). 



Messrs. Mattern visited Skippack Creek on October 1, at the 

 locality I obtained this species previously.^" They write: ''We 

 went up the creek and after about three-quarters of a mile we caught 

 the darter. We supposed it to be the shielded darter, as it has the 

 plates or scales on the belly and a slightly forked tail. We caught 

 two of them and think we saw four more. In fact, we were able to 

 identify them in the water. They are very swift swimmers. How 

 you were able to catch your example with a hand net is a mystery. 

 As we stepped into the swift water they would immediately dart 

 up stream and hide under stones. Occasionally one would rest in 

 an unprotected position on top of a stone, and as soon as we made 

 any movement it would dart off six or eight feet. Likely as we did 

 not know how to fish for it, we may have overlooked it in Lehigh 

 County streams." 



9 Bull. U. S. Nat. Mus., No. 47, IV, 1900, PL 121. 

 10 Science, XL, December 25, 1914, p. 939. 



