Thread subject: Diptera.info :: Suilla
Posted by oceanlis2000 on 28-07-2011 10:15
#1
Hi
Looking at the Suilla Key at http://www.online-keys.net/infusions/keys/keys_view.php
I am wondering what is meant by short and long arista?
Thank you
Posted by Stephen R on 28-07-2011 11:02
#2
It's 'long plumose' (feathery with long rays) and 'short plumose' (feathery with short rays). The other possibilities are 'bare' and 'pubescent' (downy - very short rays).
Posted by Andrzej on 28-07-2011 11:37
#3
You should measure the width of "feather" and compare to the diameter of the basal part of arista, or to the height of first flagellomere !
Posted by Andrzej on 28-07-2011 11:44
#4
a pic from Czerny (1927) !
Posted by oceanlis2000 on 30-07-2011 10:17
#5
Thank you both,
It seems that the length of the arista is c. the same in both
What do you mean by Ray (Stephen) feather (Andrzej), 1 hair on the arista?
Short plumose seems to have long hairs on the arista?