WATER BEETLES IN RELATION TO PONDFISH CULTURE. 
263 
BEETLE DISTRIBUTION IN FAIRPORT FISHPONDS. 
The first of the two following tables shows how the beetles were distributed 
in the various ponds at Fairport, Iowa; the second shows how they were distrib- 
uted according to beetle families. 
Beetle distribution in the Fairport (Iowa) fishponds. 
[a, abundant; c, common; f, few in number; r, rare. *See text, p. 264.] 
Pond number and series. 
Beetle species. 
12 
B 
13 
B 
14 
B 
15 
B 
16 
B 
i 
D 
2 
D 
D 
4 
D 
5 
D 
D 
7 
D 
D 
D 
E 
2 
E 
3 
E 
4 
E 
F 
2 
F 
3 
F 
Haliplidse: 
f 
a 
c 
f 
c 
r 
Haliplus ruficollis 
r 
r 
r 
r 
r 
f 
c 
a 
c 
r 
r 
f 
f 
r 
r 
r 
r 
r 
r 
r 
r 
r 
r 
Peltodytes edentulus 
r 
f 
c 
f 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
f 
r 
r 
Dytiscidas: 
a 
r 
c 
c 
r 
a 
r 
r 
f 
r 
r 
r 
r 
f 
r 
r 
f 
j. 
r 
f 
r 
r 
r 
r 
r 
j. 
Coelambus acaroides 
r 
r 
Coptotomus interrogate 
r 
c 
r 
c 
c 
c 
J 
c 
c 
c 
c 
c 
J 
c 
r 
a 
Cybist-ftr fimhriolatus 
r 
r 
a 
r 
r 
a 
r 
r 
f 
_ 
a 
Dytiscus hybridus 
f 
f 
Dytiscus verticalis 
a 
c 
c 
c 
c 
f 
r 
c 
a 
c 
c 
c 
r 
Graphoderes fascicollis 
f 
Graphoderes li herns 
Hydrocanthus iricolor 
r 
r 
r 
Hydroporus consimillis ...... 
r 
c 
r 
r 
c 
r 
Hydroporus niger* 
r 
r 
r 
r 
r 
r 
r 
Hy drovatus pustulatus 
r 
r 
f 
r 
f 
Ilybius biguttulus 
Laccophilus maculosus 
a 
c 
a 
f 
a 
a 
a 
a 
a 
a 
a 
a 
c 
a 
a 
a 
a 
c 
a 
a 
Laccophilus proximus 
f 
a 
a 
a 
c 
c 
Laccophilus undatus* 
r 
Thermonectes basilaris. 
r 
r 
f 
r 
r 
r 
Thermonectes omaticollis* 
a 
r 
c 
r 
c 
Gyrinidae: 
Dineutes americanus 
Gyrinus analis. ................ 
a 
a 
c 
c 
a 
a 
a 
a 
a 
a 
a 
a 
a 
a 
a 
a 
c 
c 
c 
r 
Gyrinus limbatus 
r 
c 
c 
r 
r 
r 
a 
r 
r 
p 
Gyrinus minutus* 
Gyrinus ventralis 
c 
r 
c 
p 
r 
r 
r 
a 
r 
r 
c 
Uvdropliilidae; 
Berosus pantherinus* 
j- 
r 
f 
j. 
j. 
r 
Berosus perigrinus 
r * 
r 
r 
r 
Berosus striatus 
r 
r 
a 
r 
a 
a 
a 
a 
f 
Creniphilus despectus* 
r 
r 
r 
Creniphilus digestus 
Creniphilus subcupreus 
r 
r 
r 
r 
r 
r 
r 
Enochrus diffusus 
r 
f 
a 
f 
r 
f 
a 
a 
a 
a 
r 
a 
f 
r 
r 
r 
f 
r 
r 
Enochrus hamiltoni* 
r 
Enochrus nebulosus 
c 
r 
r 
f 
c 
r 
r 
Enochrus ochraceus 
a 
f 
a 
a 
a 
Enochrus perplexus 
r 
r 
r 
r 
Helophorus lacustris 
r 
Helophorus lineatus* 
r 
Hydrochus squamifer 
r 
Hydrophilus obtusatus 
a 
c 
r 
r 
r 
r 
a 
c 
r 
Hydrous triangularis 
c 
f 
r 
r 
r 
c 
c 
c 
c 
c 
c 
c 
c 
a 
c 
c 
r 
a 
c 
Laccobius a gilfs* 
r 
Tropistemus glaber 
a 
r 
r 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
Tropistemus lateralis 
a 
a 
r 
a 
a 
a 
a 
a 
a 
a 
a 
a 
c 
c 
a 
a 
c 
c 
c 
Tropistemus mixtus* 
c 
f 
r 
r 
Donaciidae: Donacia aequalis 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
c 
.... 
.... 
