138 Journal New York Entomological Society. [^'°'- xxix. 



Plant Lice (Homop.). 



Plant lice were unusually abundant throughout the season, espe- 

 cially on Asclcpias syriaca and Asclcpias pulchra, in fact often times, 

 these were the sole insect associates of the plants. The following 

 species were kindly identified by Prof. C. P. Gillette. 



Aphis lutescens Mon. New Brunswick, N. J., July 9, plentiful on 

 leaves and stems of A. pulchra until frost. Plentiful on stems 

 of A. syriaca especially near ground during the fall. 



Aphis asclepiadis Fitch. Riverton, N. J., June 22, plentiful on A. 

 syriaca. 



Myzocallis asclepiadis Mon. New Brunswick. N. J., May 30, plenti- 

 ful on A. syriaca. 



Aphis sp. Hanover Farms, N. J., June 10, plentiful on A. syriaca. 

 For additional species occurring on milkweeds, see Wilson and 



Vickery, List of Aphididse of World (Tr. Wis. Acad. Sci. Art. Let., 



Vol. XIX, part i) and Dr. E. M. Patch, Food Plant Cat. of Aphididse 



of World, Part VI (Bui. 282, Me. Ag. Exp. Sta.). 



Tetranychus telarius Linn. (Acar.). 



At Monmouth Junction, N. J., on June 19, several plants of 

 Asclcpias syriaca were found to be heavily infested and badly injured 

 by mites. Elderberry adjoining the milkweeds was also severely 

 infested. The species was identified by Dr. H. E. Ewing as our 

 common spider mite Tetranychus telarius Linn. 



Other Insects Associated with Milkweeds. 



The following list of records, dealing for the most part with 

 flower visitors, is necessarily incomplete. Systematic collecting would 

 result in the addition of many new names. 



Neuroptera. 

 Chrysopa interrupta Schneid. New Brunswick, N. J., July 4, visiting 

 flowers of A. syriaca at night. 



Homoptera. 

 Aspidiotus perniciosus Comst. Listed as attacking milkweed (prob- 

 ably a woody kind) (Essig, Inj. and Ben. Ins. Cal., 191 5, p. 180). 



