A song species from western North America, ranging (at least) from the Pacific Northwest to southern California.  Shown below are five SRUs, each consisting of a single longish volley of abdominal vibration followed by an unstructured “rumble.”  A sexually receptive individual typically produces a series of such SRUs.  In a duet, the partner would insert his or her SRU between the SRUs illustrated.  As in C. plorabunda, the partners match their tempo to one another.  Note the similarity in frequency structure to the song of C. plorabunda: molecular data indicate that the two are probably sister species.

See Henry, C. S., M. M. Wells, and R. J. Pupedis. 1993. Hidden taxonomic diversity within Chrysoperla plorabunda (Neuroptera: Chrysopidae): two new species based on courtship songs. Ann. Entomol. Soc. Am. 86(1): 1-13.

The molecular work is summarized in Henry, C. S., M. L. M. Wells, and C. M. Simon. 1999. Convergent evolution of courtship songs among cryptic species of the carnea-group of green lacewings (Neuroptera: Chrysopidae: Chrysoperla). Evolution 53(4): 1165-1179.