Chrysops obliquefasciatus Macquart, 1838 - Identification

This species has been described under several names and occurs in several forms:
Chrysops confluens Loew, 1858
Chrysops fuscus Ricardo, 1902
Chrysops natalis Macquart, 1846
Chrysops stigmaticalis Loew, 1858

Thorax black with pale longitudinal stripes, usually with yellow tufts of hairs on the pronotum and pleurae. Abdomen black, may have grey tomentum or pale hind borders on the segments. Wings with oblique irregular crossband (of variable pattern) and maybe clear spots. Legs bicolor (different according to form).

The differences between these forms can be checked with Ricardo's key to the forms (then different species)
https://www.biodiversitylibrary.org/page/19331655#page/393/mode/1up

Original description by Macquart:
https://www.biodiversitylibrary.org/item/109528#page/163/mode/1up

Description by Loew (Chrysops stigmaticalis):
https://www.biodiversitylibrary.org/item/35325#page/47/mode/1up
with illustration of wing (fig 18): https://www.biodiversitylibrary.org/item/35325#page/351/mode/1up

Description by Loew (Chrysops confluens):
https://www.biodiversitylibrary.org/item/35325#page/48/mode/1up
with illustration of wing (fig 19): https://www.biodiversitylibrary.org/item/35325#page/351/mode/1up

Description by Ricardo (Chrysops fuscus):
https://www.biodiversitylibrary.org/page/19331655#page/394/mode/1up

Photos of syntype (MNHM Paris):
https://www.gbif.org/ru/occurrence/1265038324

Illustration of Chrysops stigmaticalis in Austen:
https://www.biodiversitylibrary.org/item/75729#page/247/mode/1up

由使用者 traianbertau 在 2023年08月04日 07:57 所貼文