Figures 10-17. 1) Slide mounted Sipha elegans del Guercio alate. Photograph: Susan Halbert and Lyle J Buss, University of Florida, Gainesville. 11) Slide mounted Sipha elegans del Guercio aptera. Photograph: Susan Halbert and Lyle J Buss, University of Florida, Gainesville. 12) Colony of ant -tended Sipha maydis Passerini on wheat. Photograph: Lisa M. Ames. 13) Close up of Sipha maydis Passerini colony with adults, immature stages, and feeding damage. Photograph: Lisa M. Ames. 14) Slide mounted Sipha maydis Passerini alate. Photograph: Susan Halbert and Lyle J Buss, University of Florida, Gainesville. 15) Slide mounted Sipha maydis Passerini aptera. Photograph: Susan Halbert and Lyle J Buss, University of Florida, Gainesville. 16) Dorsum of Sipha glyceriae (Kaltenbach) from Europe, showing denticles. Photograph: Susan Halbert. 17) Dorsum of Sipha flava (Forbes) showing lack of denticles. Photograph: Susan Halbert.