loud-singing bush crickets
|Key to genera of bush crickets (Eneopterinae).|
These are arboreal crickets that occur only in the New World. Their songs are loud and distinctive, but they are usually difficult to collect. Most tropical species have yet to be distinguished and named. Four of the six U.S. species were not recognized until 1969.
Hindwings longer than forewings; foretibia with anterior and posterior tympana. Anterior tympanum fully exposed; posterior tympanum smaller and sometimes scarely evident. Male forewings not much wider near tips; greatest width of right forewing no more than 20% greater than width at file. Ovipositor >10 mm; shaft cylindrical. Length 15-22 mm.
Identification of species
The species are most easily identified by their songs. Morphologically the most useful features are those of the stridulatory file and the dorsal view of the head.
Three of the U.S. species are dimorphic in color. In jumping (O. saltator), false jumping (O. luteolira), and keys (O. diplastes) bush crickets some individuals are conspicuously darker than others and intermediates are rare or lacking. The frequencies of dark individuals in the three species are approximately 50, l0, and 80% respectively.