1915] Andrews: Survey of Lake Butte Des Morts Bog 
205 
All day long there is a constant activity which reaches its great- 
est height between the hours of twelve and two. 
ANIMAL LIFE ON A SMALL SECTION OF THE BOG 
Perhaps the most general impression produced by a first ac- 
quaintance with any small section of the bog is the apparent 
absence of animal life during certain hours of the day, and the 
great activity during certain other hours. Tables III, IV, and V 
will give an idea of the number and kind of animals present at 
different hours. Table III deals with those found from the fifth 
to the twentieth of July; Table IV gives those present from the 
twentieth to the thirty-first; and Table V those found during the 
first ten days of August. 
TABLE III 
Showing those animals which were active on the area of observation from 
July 5 to July 20 
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. 
Aves 
Agelaius phoeniceus phoe- 
niceus 
* 
* 
* 
* 
* 
* 
* 
Amphibia. 
Rana pipiens 
* 
* 
* 
* 
• 
* 
* 
Odnnat.a 
Libellula pulchella 
1 
1 
2 
4 
Enallagma ebrium 
1 
3 
4 
4 
5 
2 
Enallagma pollutum 
1 
1 
Aeschna constricta 
1 
1 
Sympetrum rubicundulum . . 
1 
Lepidoptera 
Eu vanessa antiopa (larva)... 
1 
1 
1 
1 
1 
1 
1 
O rt.h npt.pr a 
Nemobius fasciatus 
1 
1 
1 
1 
V,ph am ari rl a 
Hexagenia limbata 
TTam l ptara 
Diedrocephalus, sp 
10 
2 
2 
2 
Limnobates lineata 
Ranatra fuscea 
1 
2 
Diptera 
Lucilia syl varum 
1 
1 
1 
Tetragnatha straminea 
1 
1 
1 
Lucilius caesar 
1 
5 
Dolichopus lobatus 
1 
1 
15 
15 
15 
3 
Dolicbopus brevimanus 
1 
2 
Chrysops niger 
1 
Coleoptera 
Pterosticus lucublandus 
1 
Hymenoptera 
Pelopaeus cementarius sphe- 
cidae 
1 
2 
1 
Arachnida 
Rapt, ilia 
Chrysemys bellii 
1 
Mollusca 
Lymnaea elodes 
1 
1 
1 
1 
2 
1 
Lymnaea palustris 
2 
2 
Succinea retusa 
25 
20 
10 
14 
18 
Annelida 
Placobdella rugosa 
1 
