Entomology Collection TitleImage Bugs Pinned
Species Page - Okanagana rimosa
species list search results ->Okanagana rimosa ->species page

E-mail this Page   
Print this Page   
Link to this Page   

scientific name    Okanagana rimosa    

common name     Say's Cicada

Dry deciduous and mixedwood forest.

Adults emerge from June to July (Strickland 1953).

A moderate-sized, predominantly black cicada with yellowish-orange markings. The relatively narrow forewings (width:length 0.29 - 0.31) will segregate rimosa from O. bella and O. occidentalis. Very similar to O. canadensis; to reliably separate specimens of rimosa from canadensis the structure of the tymbal must be examined, which has 7 to 8 (rarely 9) ribs in rimosa and 10 to 11 ribs in canadensis (Alexander et al. 1972). In Michigan, rimosa is marked with a brighter orange compared to the tan markings of canadensis, but it is not clear if this trait holds up for Alberta populations since museum material is limited. There are likely habitat and song differences as well, but this data is also lacking for Alberta populations.

life history
Duration of immature stages unknown, but undoubtedly several years as in other species of the genus. Males perch in various types of vegetation to sing, often among trees greater than three metres above ground. Males emit an alarm sound when handled or harassed (Cooley 2001). Females can acoustically locate calling males during flight, and approach males by walking or shorter flights once visual contact has been made (Stölting et al. 2002). Parasitoid flies are known to exploit the singing behaviour of males to locate potential host cicadas on which to deposit larvae (Lakes et al. 2000, Koehler & Lakes 2001). A song portion of O. rimosa in Michigan can be found at: http://insects.ummz.lsa.umich.edu/fauna/Michigan_Cicadas/Michigan/Index.html

No obvious concerns.

diet info
Adults feed on plant fluids including those of maple (Acer sp.) (Cooley 2001). Adults are associated with aspen (Populus tremuloides) stands in Ontario (Davis 1930).

Recorded from central to southern Alberta (Strickalnd 1953). Occurs from Alberta east to New Brunswick and Nova Scotia, south through Minnesota, Vermont, New Hampshire, Mississippi, New York, Pennsylvania, Ohio, Virginia, Michigan, Wisconsin, Illinois, Indiana, Iowa to North Carolina and Tennessee. In the west, ranges south through Montana, North Dakota, South Dakota, Nebraska, Nevada, Wyoming, Utah, Washington, Oregon to California (Simons 1954, Maw et al. 2000, Brown & Brown 1990).

quick link

Comments (1)Add New Comment

lee (2011-07-29)
we also have them in the bc interior around keremeos
sighting july 27 2011 ashonola river area

Comments are published according to our submission guidelines. The EH Strickland Entomological Museum does not necessarily endorse the views expressed.

Add New Comment (all fields are required)

Related Species Info
Display Hierarchy
References (10)
Specimen Info
There are 8 specimens of this species in the online database
Map Distribution
Adult Seasonal Distributioncreate a collection histogram with specimens
Specimen List (8)


Logo Department of Museums and Collections ServicesLogo University of Alberta