78 



Oncerotrachelus acuminatus Say. Columbus. 



Common. A southern species. This is proba- 

 bly about its northern limit. 



Emesa longipes De G. Columbus. Put in Bay. 

 Common. Occurs on various trees. Carnivo- 

 rous remarkable for very slender body and legs. 



LIMNOBATIDAE. 



Litnnohates lineata Say. Columbus. Widely distribu- 

 ted. 



HYGROTRECHIDAE. 



HygTOtrechus remig-is Say . Columbus. Water strider. 



Abundant over large part of U.'S. 

 Littinotrechus marginatus Say. Columbus. Common 



and widely distributed. 



YELIIDAE. 



Stephania picta H. Schf. Columbus. Common on 

 quiet water. 



Rheumatohates rileyi U. Columbus. This very inter- 

 esting little species I found quite plentiful at 

 Big Run south of Columbus. 



Hebrus americanus Uhl. Columbus. A minute species 

 of wide range. 



Rhagovelia obesa Uhl. Columbus. 



SALDIDAE. 



Said a ligata Say. Wauseon. 



SaJda interstitialis Say. Wauseon, Sandusky. 



Salda humilis Say. Columbus, Sandusky, Johnsons, Id. 



Abundant. 

 Salda orbiculata Uhl. Ironton, June, 1899. Wooster. 



GALGULIDAE 



Galgulus oculatus Fab. Sugar grove (Kellicott) a 

 southern species. 



BELOSTOMATIDAE. 



Zaitha fluminea Say. Columbus. Abundant over 

 eastern U. S. 



