Numbers
Five species in the US according to Borror, DeLong, Triplehorn.
(1)
Ten species in North America, twenty species worldwide according to Arnett.
(2)Identification
Slender, elongate; yellowish brown to gray in color. Wingless. Antennae long and filiform with 28 to 50 segments. Cerci long with 8 segments. Ovipositor sword shaped.
Larvae and adults may be confused with some crickets or with the phasmid genus Timema
Range
Japan, Siberia, Northwestern US and Western Canada.
Habitat
High elevations, under rocks, at the edge of snow fields or on ice caves and in moss.
Food
Probably predaceous or they feed on debris of other insects.
Life Cycle
Life cycle poorly known. They take several years to mature.
Paurometabolous, the larvae resemble adults.
Remarks
Active at rather low temperatures. Mostly nocturnal. They hide druing the day, particularly when the temperature is higher than 0 degrees Celsius.
