Thread subject: Diptera.info :: Hover fly from Hong Kong: Ceriana sp.

Posted by chickenold on 28-02-2013 15:59
#1

Photo taken by my friend today. Can it be C. grahami?
Thanks!

Posted by Gerard Pennards on 16-03-2013 15:07
#2

Could be, but to me Ceriana sp. at the moment...

Posted by AaronS on 28-11-2018 04:49
#3

Your friend's photo does key to Tenthredomyia (=Ceriana) grahami in Shannon[1927]. More details on that species...including a quote of the 1925 original description by Shannon (seemingly based on a single female specimen)...can be found in the comments thread under this iNaturalist post.

Note that the ceriodine in your friend's photo is lacking the two small yellow spots placed laterally on the vertex described for T. grahami by Shannon...though that could conceivably be a sexually dimorphic character of the female only (I think your photo shows a male...the eyes appear as if they may be very narrowly contiguous).

Edited by AaronS on 28-11-2018 04:51