16 
RHAMNACEAE 
Ceanothus. Banks, N. 1912. At the Ceanothus in Virginia. Ent. News 
23:102-110. 
ROSACEAE 
Crataegus. Wellhouse, W. H. 1922. The insect fauna of the genus 
Crataepus. Ne Y. State Ag. Expt. Sta. Mem. 56:1041-1136. 
Malus. Phillips, E. Fe 1933. Insects collected on apple blossoms in 
western New York. Ag. Res. Jour. 46:851-862. 
Rosa. Balduf, We. V. 1959. Obligatory and facultative insects in rose 
hips. Ill. Biol. Monog. 26:1-194. 
Rosae Chittenden, F. H. 1901. Some insects injurious to the violet, 
rose, and other ornamental plants. (See also Violaceae for 
citation. ) 

Rubus. Tillyard, R. J. 1927. Insect control of noxious weeds: joint 
scheme initiated against blackberry and other species. 
New Zeal. Jour. Ag. :7 pp. (Reference not seen.) 
Rubus and Spiraea. Blackman, M. W. 1918. On the insect visitors to the 
blossom of wild blackberry and wild spiraea-—a study in 
seasonal distribution. N. Y. State Col. Forestry, Syracuse 
Univ. Tech. Pub. 10:119-144. 
RUBIACEAE 
Cephalanthus occidentalis. Needham, J. G 1903. Button-Bush insects. 
Psyche 10:22-31. 
RUTACEAE 
Citrus. Hubbard, H. G. 1885. Insects of the orange. U. S. Gov't. 
Printing Office. Washington, 227 Pppe 
Citrus. Muma, M. H., A. G. Selhime, H. A. Denmark. 1961. An annotated 
list of predators and parasites associated with insects and 
mites on Florida Citrus. Fla. Univ. Ag. Expt. Sta. Bul. 
634:1-39. 
Citrus. Quayle, Henry J. 1938. Insects of citrus and other subtropical 
fruits. Comstock Pub. Coe, Ithaca, N. Y. 583 pp. 
Citrus. Watson, J. Re 1918. Insects of a citrus grove. Fla. Univ. Ag. 
Expt. Sta. Bul. 148:165-267. 
SALICACEAE 
Populus. Young, Robert A. 1906. Insects affecting the poplar. Columbus 
Hort. Soce Proc. 1906:68-82. (Reference not seen.) 
