Explanation of Names
cincticollis = 'with margined neck'
length including forceps rarely over 10-15 mm (1)
It would seem that E. cincticollis can be anything between completely wingless (not even rudimentary?) and fully winged in both sexes.
There are some instances of winged E. annulipes in older literature but no known specimen, so these are probably misidentifications and annulipes is assumed to be always wingless with rudimentary flaps on the locations of the wings only.
Images of wingless cincticollis can be hard to separate from annulipes, especially when the specimen doesn't have pale rings in the antennae (which occurs frequently in both species) but adult annulipes have 15-16 antennal segments (rarely 14 or 17), whereas cincticollis has 17-20 segments.
If there is a pale ring, in cincticollis it will often be a single pale segment, sometimes two around segment 15-16. On annulipes it would usually be 2-3 pale segments (sometimes 1) located further down around segs. 11-13.
Please note that nymphs have different counts of antennal segments, depending on stadium. (Arp, BG comment, 2019
), see also Langston & Powell (1975)(1)
Native to w. and equatorial Africa; established in AZ, CA(1)(2)
, and TX (BG data)
to semi-arid areas (BG data)
mid-July to late September at Davis, CA per light trap data (1)
wingless to fully winged ("alary polymorphism")(1)
earliest record in our area: CA 1946, & AZ 1949(1)
Hubbell, T.H., and H.S. Wallace 1955. The earwigs Euborellia cincticollis and E. anntilipes in Arizona. Entomol. News 66(2): 42.