What Is Biting You?1 E. E. Harlow, C. A. McNeill, R. W. Baldwin, R. M. Pereira, P. G. Koehler, and J. C. Medley 2 Why are you itchy? Identify the problem pest with this handy poster. Click here to print or view the entire publication. The poster is also available in Spanish: ¿Qué te está picando? Figure 1. Click to enlarge thumbnail. For full size, view pdf.