First North American records of Conocephalus dor satis (Latreille 1804)(Orthoptera, Tettigoniidae)

摘要

The genus Conocephalus comprises 158 species and occurs in all temperate and tropical regions of the world (Eades et al. 2011). There are 18 native species in North America north of Mexico (Walker 2011) and 6 native species in Canada (Vickery & Kevan1985). Vickery & Kevan (1985) provide a key to the species found in Canada and the northern United States of America. In fall 2008, I received a specimen collected near Vancouver, British Columbia, that I could not identify using North American guides. After collecting more specimens in 2009 I identified the species as Conocephalus dorsalis (Latreille 1804) by comparison with figures in Chopard (1922). Both sexes are illustrated in Figs. 1 and 2. This species may be readily differentiated from all otherNorth American members of the genus without reference to dichotomous keys. The male cerci (Fig. 3) are unlike any other species in North America. The inner tooth of the cercus is both long and unusually stout in relation to the distal end of the cercus.The females are distinctive in that the ovipositor is relatively short (shorter than the hind femur) and curves upwards. In North America, this ovipositor morphology is shared only with C. nemoralis (Scudder 1875) (Rehn & Hebard 1915). The ranges of the two species do not overlap at present. A recording of the calling song of C. dorsalis can be found at the Orthoptera Species File Online (Eades et al. 2011). An ocillogram of the calling song is illustrated in Ragge & Reynolds (1998).