Two species of Calophya (Hemiptera: Calophyidae) were previously reported from Mexico: Calophya dicksoni Jensen associated with Fouquieria columnaris Kellogg ex Curran (Ericales: Fouquieriaceae) and Calophya schini Tuthill associated with Schinus molle L. (Sapindales: Anacardiaceae). Here, a 3rd species, Calophya spondiadis sp. nov. from hog plum, Spondias purpurea L. (Sapindales: Anacardiaceae), is described and illustrated. The immatures do not induce galls on the host. They are polyphenic with respect to the presence or absence of long asperate processes on head, thorax, wing pads, and abdomen which is unusual and so far known only for Calophya californica Schwarz. The original description of C. dicksoni is supplemented and the current status of C. schini is discussed.