206 Bulletin Wisconsin Natural History Society [Vol. 13, No. 4 
TABLE IV 
Showing those animals which were active on the area of observation from 
July 20 to July 31 
ORDER 
SPECIES 
6.30 
A. M. 
7.30 
A. M. 
9.30 
A. M. 
11.30 
A. M. 
1.00 
P. M. 
3.30 
P. M. 
5.30 
P. M. 
niceus 
* 
* 
* 
* 
* 
* 
* 
* 
* 
* 
* 
* 
* 
* 
Bufo americanus 
1 
1 
1 
Enallagma 
1 
1 
1 
2 
Libellula pulchella 
2 
5 
2 
Sympetrum rubiculundum.. 
1 
1 
1 
1 
Aeschna verticalis 
1 
Aeschna constricta 
1 
Anax junius 
1 
6 
6 
3 
3 
2 
j 
Orthoptera 
Conocephalis palustris 
2 
3 
3 
Nemobius fasciatus 
1 
Ephemerida 
Hexagenia limbata 
1 
Hemiptera 
Diedrocephala 
4 
12 
18 
5 
3 
Diptera 
Scatophaga callopistra an- 
1 
nulipes 
2 
2 
1 
1 
Toxomerus germinatus 
3 
2 
20 
16 
8 
6 
Tetragnatha straminea 
1 
Lucilius caesar 
1 
1 
Phornia regina 
1 
Psilophius ciliatus 
3 
3 
Chrysops sackeni 
2 
Winthemia quadrupestulata 
1 
Dolichopus brevimanus 
1 
Tipula abdominalis 
1 
Coleoptera 
Tetraopes tetraophthalmus.. 
2 
4 
2 
Pyropyga decipiens 
1 
Pyropyga fenestralis 
1 
1 
1 
Hymenoptera 
Halictus hortensis 
1 
2 
2 
5 
Prosopis modesta 
3 
2 
1 
Aracbnida 
Coelotes fedelis 
1 
1 
1 
1 
1 
1 
1 
Lycosa hellulo 
1 
Reptilia 
Chrysemys bellii . 
1 
Mollusca 
Lymnaea palustris . 
1 
1 
Succinea retusa 
25 
25 
3 
8 
10 
Lymnaea elodes 
1 
1 
1 
Annelida 
Haemopis lateralis 
1 
These tables show that certain species which were very active 
in the morning disappeared in the afternoon, and also that many 
found in great numbers during the first part of July were absent 
in August and to some extent during the last weeks of July. This 
is strikingly brought out by the total absence of Toxomerus ger- 
minatus and Toxomerus marginatus in August, although they were 
