Pteronarcys dorsata. Fifty-one and six signals were obtained from one, 2–3-day old male and female, respectively, at 24°C and 65 FTC. The male and female of this species produced 2-way sequenced signals with either the female answer following the call (N=13), or with the answer beats interspersed within the call, beginning during the male’s 4 th (N=3), 5 th (N= 13) and 6 th (N=6) interval. The male called with signals of 6 mode beats; with intervals of 251.9 ± 9.6 ms (Fig. 13, Table 3). His average individual intervals gradually decreased from 258.3 ms (i1) to 241.6 ms (i6), the last interval increased to 245.6 ms (N=2) (Table 4). Mode and mean beats per female signal were 5 and 4.9 ± 0.8; with intervals of 359.7 ± 45.9 ms. The ♂ - ♀ exchange interval was 141.1 ± 85.5 ms for sequenced and overlapped duets. The results here coincide well with those of Stewart et al. (1982), with slight differences probably attributed to variation in environmental inputs rather than a new dialect. We add the interspersed female answer signal to the description of this species signaling.

{"references": ["Stewart, K. W., Szczytko, S. W. and B. P. Stark. 1982. Drumming behavior of four species of North American Pteronarcyidae (Plecoptera): dialects in Colorado and Alaska Pteronarcella badia. Annals Entomological Society of America 75: 530 - 533."]}

Published as part of Sandberg, John B. & Stewart, Kenneth W., 2006, Continued Studies Of Vibrational Communication (Drumming) Of North American Plecoptera, pp. 1-14 in Illiesia 2 (1) on page 13, DOI: 10.5281/zenodo.4758579