May, 1953 
of the streams in central Illinois: Stenonema 
tripunctatum. 
5. Permanent or semipermanent brooks 
with rapid flow, such as the spring-fed 
stream in the Botanical Gardens near Elgin 
or the spring-fed tributaries of Lusk Creek 
and Gibbons Creek in southern Illinois, fig. 
5: Paraleptophlebia moerens and praepedita 
and Baetis vagans. 
6. Relatively permanent ponds, many of 
which are found in Lake, Cook, and Du Page 
counties, almost always in woods: Calli- 
baetis skokianus, ferrugineus, and fluctuans. 
Fig. 4.—Kankakee River at Aroma Park. 
bajkovi and laurentina, Pseudocloeon 
bipunctatum. 
Burks: THe Mayrties or ILLINOIS 
dubium, 
wn 
7. Temporary ponds, which are commonly 
found in central Illinois in the springtime: 
Leptophlebia nebulosa and cupida. 
8. Small, temporary pools, usually along 
the margins of streams, which have greatly 
reduced current or no current: Siphlonurus 
marshalli, Tricorythodes spp., Caenis ridens 
and hilaris, Leptophlebia cupida, Habrophle- 
biodes americana, Callibaetis fluctuans, and 
Cloeon mendax, rubropictum, and simplex. 
9. Stagnant bodies of water, such as the 
vegetation-choked backwaters of streams or 
bogs: Caenis simulans. 
Habitat of Ephemerella needhami, Baetisca 
Baetis spinosus, Stenonema integrum and 
