Muttkowski—The Fauna of. Lake Mendota. 
471 
Schulz, W. A. 
1910. Neuer Beitrag zur Kenntniss der Wasserimmen. Ann. 
Biol. Lac., 4, pp. 187-193, 4 t. ff. 
1910. Suesswasser-Hymenopteren aus dem See von Overmeire. 
Ibid., pp. 194-210, t. ff. 2. 
Table 1. Areas of the Lake at Various Depths 
The difference of the areas is indicated is square meters. Ecological 
Habitats shown for comparison. 
Depth 
in meters 
Area 
iu sq. km. 
Difference 
in sq. m. 
Ecological 
Zone 
Ecological Area 
0 
38.4 
) Shore 
y to 
1 
35.4 
4,000 000 
1 Kachion 
, Eulittoral 
2 
33.7 
1,700 000 
) 
(Euphytal) 
3 
32.0 
1,700 000 
V Plant 
Area 
5 
29.0 
3,000 000 
) Zone 
Littoral 
7 
26.5 
2.500 000 
> Shell Zone— 
- Sublittoral 
1 Region 
\ (Dysphatal) 
10 
24.0 
2,500 000 
1 Plantless 
1 
Area J 
15 
16.8 
7,200 000 
1 
Zone 
20 
6.6 
10,200 000 
1 
Region 
25.6 
0.0 
6,600 000 
J 
Table 2. Types of Odonate Larvae 
Habitat 
Prefer¬ 
ence 
Form 
Group 
General 
Habitus 
Group 
Form 
Habitat 
Preference 
Rock Cling 
Some 
ers 
ZYGOPTERA 
Depressed 
Petrophi- 
lous 
1 
r Free 
Phyto- 
Cylin¬ 
LESTI- 
1 
J 
Swimmers 
philous 
drical 
NAE 
] 
\ 
1 Plant 
r Clingers 
ZYGOPTERA 
Elongate 
Phytophi- 
Phyto- 
Lanceol¬ 
AESCH- 
: Loping 1 
Swim- 1 
1 mers ! 
lous 
philous 
ate 
NINAE 
1 
LTBELLTJ-1 
LIDAE 1 
CORDTTLE- 1- 
GASTER- 1 
Squat, 
Depressed 
Benthophi- 
lous 
r GOM- 
r Sprawl- J 
1 
1 
INAE J 
Scapto- 
Very flat 
J PHTNAE 
1 PETAL- 
) ers 
philous 
1 URINAE 
IBurrowers 
