Potosia fieberi in the Moscow region

I think this link will help you at least in some way
http://kkmo2.verhovye.ru/rb/bspozvon/protaetia_fieberi.php

I caught fibery in 2011 in the Kaluga region, Medynsky district on the umbrella between other beetles, July.

and to me in the crown trap on beer braga flew. but it's a long way from MO

It differs immediately in 2 pits on the elytra from the ubiquitous aurata, the color of the abdomen is not the same, so checking the aurata on flowers there is a chance of catching fiber-imho.

It is quite common on flowing sap in oak forests along the banks of the Oka River in the area of the PTZ. Carefully look through each beetle and you will find!

Who can show the distinguishing features between them in the drawing? I would like to distinguish it reliably.

I have one hatched from a larva taken in the PTZ. Neither on flowers, nor on oaks did not come across. I went through aurat and metallic about thirty of each type.

Fiberi in the Middle Lane can only be confused with metallica. The main difference, as stated in the CC article, is the absence of white spots in the joints of the lower leg and thigh of the middle and hind legs. The legs are usually dark copper in color, while the metallic ones are dark green with a white spot at the knee joint. White spots on the elytra are always less than in aurata, metallica or lugubris, sometimes they almost completely disappear. More glitter. Fiberi's is fat, not like the other bronzes. But this sign, IHMO, must be felt.

The only correct way to distinguish is to examine the prothorax outgrowth.

So can I go into more detail? Better pictorial

So can I go into more detail? Better drawing

I join you: as far as I know, the growth is a generic difference between potosia/cetonia.
Do two bronzes of the same genus (P. metallica and P. fieberi) have such an important distinguishing feature?

Extremely important

Extremely important

Justify, plz.

In fieberi, this process is rounder and much larger, if you take the beetle in your hands and turn it belly up, it immediately catches your eye. Thus, you can quickly sort through the mass of beetles in search of fieberi.

to vicgrr & vasiliy-feoktistov
http://molbiol.ru/forums/index.php?showtopic=146431
here, post #31 should shed some light on your question about the distinguishing features of

IMHO, fiber on metallica is similar rather weakly. In general appearance, it is much more reminiscent of aurata, from which, however, it reliably differs in the growth of the middle breast. Plus, compared to aurata, Fiberi has a much smoother sculpture of elytra, they do not have ribs.
We have already written about the difference in the shape of the process in metallica and fiber, I will only add that in metallica the shape of this process can vary slightly, but it is always small and slightly convex. In Fiberi, this process is larger, flat, rounded. The bottom of metallica is usually dark purple, while the bottom of fiber is copper-red with a strong gloss. Another sign is that the bottom of the metallica is usually quite heavily hairy, while the bottom of the fiber (at least in those individuals that I have caught) was almost naked.
Last summer I caught 3 fibery specimens in the PTZ during 2 trips (on flowers and on flowing juice), so most likely it is quite common there.

This post was edited by Dergg - 03/17/2012 02: 36

I fished in the Shatursky district of MO

Shatursky district is something new, but it may well be