Abstract
Calling songs of mole crickets known as Scapteriscus vicinus Scudder in Puerto Rico differ significantly from songs of S. vicinus and S. acletus Rehn and Hebard in the southeastern United States. Female mole crickets showed a significant response to outdoor broadcasts of a synthesized Puerto Rican song but not to synthesized songs of the U.S. S. vicinus or S. acletus. Puerto Rican “S. vicinus” (changa) may respresent two species, since two types of calling songs occur. Unlike the two U.S. species, males do not construct specialized calling burrows, male calling activity is not restricted to twilight hours, and carrier frequencies of calling songs (4.5 and 3.5 kHz) are the highest reported for any mole crickets.

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