454 



• Odonata. Libellulidae :. Plalliciiiis lydia {Dru.}. naiades. 



Hemiptera. Corixidae : adults and nymphs. 



Coleoptera. Dytiscidae : Laccophihts inaciilosiis (Germ.), adults. 



Comptotomus intcrrogatus (Fabr.), adults. 

 Dytiscid larvae abundant. 

 Haliplidae: PcUodytcs I ?-piiuctatiis (Say), adults. 



P. cdcntuhis Lee, adults. 

 Hydrophilidae : Bcrosiis sp.. larvae abundant. 

 Diptera. Chironomidpe : Pfi//'0!nr/a sp., larvae. 



Procladiiis sp., larvae. ' 



Chironomus sp., larvae abundant. 

 Sludge worms abundant. 



Station 28. — Salt Fork, 100 yards south of the railroad bridge near 



St. Joseph, September 16 (nearly equals Station 13). The water is high 



and several land areas present on the first examination (July 2:i) are now 



submerged. The fauna here is almost identical with that of Station 27. 



Ephemerida. Ephemeridae: Callibaclis sp., possibly fcrrugiiica 



Walk., naiades. 

 Hemiptera. Corixidae : adults and nymphs abundant. 



Belostomatidae : Bclostoiita dumincum Say, adults 



and nymphs. , 

 Gerridae : Gcrris luargiiiafiis Say, adults. 

 Mesoveliidae : McsovcJia iiiiilsanti White, nymphs, 

 Coleoptera. Dytiscidae: Laccophiliis in a c 11 1 s it s (Germ.), 



adults. 

 Haliplidae: Pcltodytcs u-puuctatus (Say), adults 



abundant. 

 Hydrophilidae : Tropistcrnus g I ab c r (Hbst.) , 

 adults. 

 Bcrosus striatus Say, adults. 

 Diptera. Chironomidae: Procladius sp., larvae and pupae. 



Chironomus sp., larvae abundant. 



Station -'9. — Salt Fork one mile west of the junction with Spoon 

 River, re-check September 10 (equals Station 1'3). Water very high at 

 this date. 



Hemiptera. Corixidae : adults. 



Belostomatidae: Bclostoma diiniincuni Say, adults 



and nvmphs of all sizes. 



Coleoptera. Haliplidae: PcUodytcs u-pitnctatus (Say), adults. 



Hydrophilidae: Tropistcrnus glabcr (Hbst.), 



adults and larvae abundant. 



Diptera. Chironomidae: Cliironoinus viridicollis v. d. W., 



larvae very abundant. 

 No Odonata or Ephemerida found. 



