Type species: Caligula simla (Westwood, 1847).
A cold-tolerant genus of about 10 species endemic to the eastern Palaearctic, with one species penetrating along the himalayan foothills as far west as Afghanistan. Closely related to Perisomena Walker (1855), Neoris Moore (1862) and Saturnia Schrank (1802). Included in the latter by some authors.
HOSTPLANT FAMILIES: Many trees and shrubs, but with a preference for the Rosaceae and Juglandaceae.
Type locality: N.E. India.
(Taxonomic note. Some recent taxonomic works place this species in the genus Rinaca, along with most other species of Caligula. Other works include it in Saturnia.)
Holarctic; eastern Palaearctic region. Pleistocene refuge: Monocentric -- Nepali refuge.
Found up to 2400m altitude.
In Afghanistan, late June to early July as one generation. In Kashmir, India, until late July at altitude (5000m).
Similar to those of Neoris huttoni Moore, 1862, but with 'eye-like' tubercles on the penultimate segment.
Hostplants. Apparently polyphagous. On Lonicera in Gilgit-Baltistan, Pakistan (Serge Yevdoshenko, pers. comm 2018).
PUPA: No information available.
Southeastern Afghanistan north to the Salang Pass, Gilgit-Baltistan, and Kashmir.
Extra-limital range. The himalayan foothills of northern India, from Kashmir to Bhutan. It also occurs in southern Tibet\Xizang Province, China, and Nepal.