118 
ie 
18. 
Loe 
20. 
21. 
22. 
23. 
24. 
20. 
26. 
at 
28. 
29. 
30. 
afl 
32. 
THOMAS SAY FOUNDATION 
——. 1928. Etudes sur la Biologie des Plécoptéres (Suite). 
111. Notes sur Perla abdominalis Burm., IV. La théorie de 
la persistance des tracheobranchies larvaires chex les Per- 
laria adultes. Ann de Biol. Lacustre, 12: 335-389. 
. 1927. Etudes sur la Biologie des Plécopterés IV. Le 
type Larvaire Peltoperlien. Recueal Inst. Zool. Torley-Rous- 
seau, 1: 83-98. 
Lauterborn, Robert. 1903. Tracheenkiemen an den Beinen 
einer Perliden-Larve (Taeniopteryx nebulosa L.), Zool. 
Anz., 26: 637-642. 
Mertens, Hermann. 1923. Biologische und Morphologische Un- 
tersuchungen an Plekopteren. Arch. Nat. Jahrg. 89A Heft 
2:. 1-38. 
Muttowsky, R. A. 1929. The Ecology of Trout Streams in 
Yellowstone National Park. Roosevelt Wild Infe Annals, 2, 
No. 2: 155-240. 
and Gilbert M. Smith. 1929. The Food of Trout Stream 
Insects in Yellowstone National Park. Roosevelt Wild Lrfe 
Annals, 2, No. 2: 241-263. 
Needham, J. G. 1901. Aquatic Insects in the Adirondacks: 
Plecoptera. NV. Y. State Mus. Bull. 47: 412-418. 
——. 1905. New Genera and Species of Perlidae. Proc. Bvol. 
Soc. Wash., 18: 107-110. 
—. 1918. ‘‘ Aquatic Insects’’ in Ward and Whipple: Fresh 
Water Biology: 882-885. 
and P. W. Claassen. 1922. The North American Species 
of the Genus Acroneuria. Can. E'nt., 54: 249-255. 
and P. W. Claassen. 1925. A Monograph of the Plecop- 
tera or Stoneflies of America North of Mexico. Thomas Say 
Found. of Ent. Soc. of Amer. 2: 1-397. 
and P. R. Needham. 1930. A Guide to the Study of 
Fresh Water Biology (Plecoptera pp. 8-10). Charles C. 
Thomas, Springfield, Illinois. 
. and R. O. Christensen. 1927. Economic Insects in Some 
Streams of Northern Utah (Plecoptera pp. 17-19). Utah 
Agr. Exp. Sta. Bull. 201. 
Neeracher, Fred. 1908. Beitrage zur Kenntnis der Insekten- 
fauna des Rheins bei Basel. Zool. Anz., 33: 668-670. 
. 1910. Die Insektenfauna des Rheins und seiner Zufliisse 
bei Basel. Revue Sursse de Zool., 18, No. 2, 497-590. 
Newcomer, E. J. 1918. Some Stoneflies Injurious to Vegeta- 
tion. Jr. Agr. Res., 13, No. 1, 37-42. 
