Cicada Mania

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March 31, 2020

Megatibicen dealbatus (Davis, 1915) aka Plains Cicada

Filed under: Cryptotympanini | Megatibicen | United States | William T. Davis — Tags: — Dan @ 7:04 pm

Megatibicen dealbatus (Davis, 1915) aka Plains Cicada.

Neotibicen dealbatus from Bill Reynolds collection
Megatibicen dealbatus from Bill Reynolds collection. All M. dealbatus images and information on this website.

Song

Source: ©Insect Singers

Video Playlist

Playlists contain multiple videos found on YouTube.

Name, Location and Description

A description by Wm. T. Davis.

The description comes from Wm. T. Davis’ document A NEW VARIETY OF CICADA RESEMBLING C. DORSATA. from September, 2015, published in the Journal of the New York Entomological Society. Vol. 23: 161-164.

Markings resembling those of C. dorsata [now M. dorsatus], but marginata var. dealbata is more green in color and has less black about the central area of the pronotum. The mesonotum is marked as in dorsata but is more pruinose ; the turgum has a dorsal line of white spots as in dorsata, but the sides are broadly pruinose and the posterior margin of each segment is narrowly edged with greenish yellow. Beneath both insects may be of the same color, though dorsata is usually much darker. The opercula are about as broad as long and broadly rounded at the tips. The fore wings in dorsata are oval in shape with the inner side (radius) of the costal margin blackish ; the veins are heavy and thickened, and the W-mark is prominent, whereas in luarginata var. dealbata the fore wings are more acuminate in form, the costal margin is green, darkened beyond the middle of the wing and the W-mark is not conspicuous or is wanting. One of the greatest differences between the two insects is in the genitalia. The uncus in dorsata viewed at full face is narrow and the piece below into which it locks is broadly notched with the extremities rounded. In var. dealbata the uncus is more nearly triangular in shape and the lower piece is narrowly notched with the extremities much produced. The male type of var. dealbata is figured.

Length of body 35 mm. ; length of fore wing 46 mm. ; expanse of wings 105 mm.

Classification:

Family: Cicadidae
Subfamily: Cicadinae
Tribe: Cryptotympanini
Subtribe: Cryptotympanina
Genus: Megatibicen
Species: Megatibicen dealbatus (Davis, 1915)

List of sources

  1. Davis, W.T. A NEW VARIETY OF CICADA RESEMBLING C. DORSATA. 1915. The Journal of the New York Entomological Society. 23:161-164. Link to the paper.
  2. Full Binomial Names: ITIS.gov
  3. Common names: BugGuide.net; The Songs of Insects by Lang Elliott and Wil Herschberger; personal memory.
  4. Locations: Biogeography of the Cicadas (Hemiptera: Cicadidae) of North America, North of Mexico by Allen F. Sanborn and Polly K. Phillips.
  5. Descriptions, Colors: personal observations from specimens or photos from many sources. Descriptions are not perfect, but may be helpful.

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