Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Megatibicen tremulus - "Western Bush Cicada" or "Cole's Bush Cicada"

Holotype - Tibicen tremulus (Cole, 2008) - Megatibicen tremulus - male Holotype - Tibicen tremulus (Cole, 2008) - Megatibicen tremulus - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Auchenorrhyncha (Free-living Hemipterans)
Superfamily Cicadoidea (Cicadas, Leafhoppers, and Treehoppers)
Family Cicadidae (Cicadas)
Subfamily Cicadinae
Genus Megatibicen
Species tremulus ("Western Bush Cicada" or "Cole's Bush Cicada")
Other Common Names
Suggested: "Cole's Bush Cicada" or "Cole's Grand Western Cicada"
NOTE: Due to the recent split from T. dorsatus, both T. dorsatus and T. tremulus share common names.
Size
Same as Tibicen dorsatus
Identification
This species can be separated from its close relative Tibicen dorsatus by using both morphological and behavioral characteristics. Morphologically, the sub-costa is the same color as the costa in T. tremulus. The tymbal covers are black in this species and brown in T. dorsatus (though this is variable). The best morphological feature is the subgenital claspers. In T. tremulus, the claspers form a V-shape with pointed tips. In T. dorsatus, the claspers are prong-horned and blunt, with considerably more setae. This character is not very variable.

Behaviorally, the call emitted by Tibicen tremulus is different than that of T. dorsatus.
Range
Reported from Colorado, New Mexico & w. Texas
Extent of range remains undefined.

Seems to occupy a more western distribution than T. dorsatus.
Range overlap between dorsatus & tremulus has been reported, but the extent of sympatry is not well known.

This species has also been collected within a few miles of the Oklahoma border in Western Kansas, so it's range almost certainly extends into Western Oklahoma, though it isn't represented there in the guide.
Remarks
This species was just described by Jeffery Cole and the paper detailing it has been accepted and published.
Print References
A New Cryptic Species of Cicada Resembling Tibicen dorsatus
Revealed by Calling Song (Hemiptera: Auchenorrhyncha: Cicadidae), Cole, Jeffery. Ann. Entomol. Soc. Am. 101(5): 815Ð823 (2008)