Abrupt Geographical Transition between Aposematic Color Forms in the Spittlebug Prosapia ignipectus (Fitch) (Hemiptera: Cercopidae)

Figure 1

Approximate species ranges of Prosapia ignipectus (in black) and Prosapia bicincta (in orange). The populations examined in this study lie in the far northeastern portion of the P. ignipectus range in the area of the state of Maine outlined in red (see Figure 6). Yellow dots represent the occurrence of populations with mixed color forms, nominally all P. ignipectus, towards the southern part of the P. ignipectus range (see text for details).