O.k. - now back at home and Fang (2000) FSI 19 lies open in front of me. No genitalia illustrations for these two species, but a key to Cyana
is given (both in Chinese and English).
keys out early on due to the presence of a long hair tuft on the ventral surface of the forewing; C. hamata
keys out a lot later (over 30 spp. later!).
There are, to my knowledge, four Cyana
species that have been recorded in the last 25 years in Hong Kong:
C. fasciola; C. alborosea; C. cantonensis; C. interrogationis
photos (as prepared from the forthcoming Illustrated Guide to the Moths of Hong Kong, plate 61) illustrate (to scale) the above species as follows:
9 = C. interrogationis
3 = C. fasciola
♀ 10 = C. fasciola
4 & 5 = C. alborosea
♀ 11 & 12 = C. alborosea
6 & 7 = C. cantonensis
♀ 13 & 14 = C. cantonensis
5, 7, 12 & 14 are ventral (verso) views.
Fang also lists C. harterti
(Ewles, 1890) for Hong Kong, (indeed it's the type location!), and gives the range as China (Guangdong, Hainan, Yunnan, Hong Kong), India, Singapore and Vietnam. The illustration, though is impossible to make anything of as its woefully overexposed; though it appears to be a similar size to C. fasciola
. It is illustrated on the Moths of Japan website (found in the Ryukyu Islands), though (http://www.jpmoth.org/Arctiidae/Lithosiinae/Cyana_harterti.html
), and appears very distinctive - not something I've seen here in Hong Kong.
It is not beyond the realms of impossibility that several other Cyana
species could occur, as they occur in at least two provinces from Guangxi, Guangdong, Taiwan and Hainan. These are Cyana hamata
, C. sanguinea
, C. guttifera
and C. effracta
[ Last edited by hkmoths at 2012-9-4 13:42