Identification of beetles (Coleoptera)

I can't see anything. Here's a picture of what it should look like: http://www.coleo-net.de/coleo/texte/rhizophagus.htm And what kind of tree was it and in what condition? As Elizar said, they differ quite well ecologically - nitidulus is associated with settlements of woodworms (i.e., on dying or freshly dead trees, here I only came across it on birches), and dispar is common under the lagging bark at later stages of wood decomposition, lives on everything in a row.
Staphylinids are about the same size? Like Sepedophilus a la testaceus (testaceus/marshami / constans). This is not an easy group, although if you have comparative material, you can figure it out. But hardly anyone can tell from the photo.

Found in the garden today. Ukraine, Ternopil region, rural area. Length 1.5 cm. Is it possible to identify the species?
(I take pictures as best I can, so don't judge me harshly...)

Please help me identify staphylins. Moscow region.

Thank you. On Macroid and on http://insectamo.ru/coleo no. Here insecta.pro/ru/taxonomy/1012503 minimal information/ Small beetle or poorly studied species?

Good afternoon. Tell me something specific about this staphylinchik. 2mm (!) Removed from our CMS (Uca) the other day. At least up to the family)

What about the beetle??? According to the photo-it is difficult, according to the beetle it is easier... If there is an indentation on the anal sternum (abdomen) - nitidulus...
You can try it for ecology reasons - nitidulus, s usually sit in the passages of arboreal trees, dispar, s - under the bark

June, Saratov region, Volsky district
Stenocorus meridianus?

DSCN4218 - Quedius (Microsaurus) scitus (Gravenhorst, 1806)
DSCN3595 - Q. (M.) xanthopus Erichson, 1839

yes

Saratov region, Volsky district, June.
1. Aegomorphus clavipes?

The beetle was removed by my friend 10 days ago at our KMV in his yard (Yutsa village).
- Is there some kind of grain beetle (Bruchidae)?..

I want to take advantage of the opportunity to also get involved in a similar issue, showing my own, similar to the ground beetle from Bogdankov. I just put it in a row for easy comparison and perception.
Mine was taken at our KMV in the steppe under a stone not far from the water (even the biotopes are similar and the latitude)

Most likely Kazakh - yes-Chlaenius spoliatus.
And mine is probably like Chlaenius festivus,as my brother told me earlier from the same ones we collected.

They visually even have different front legs

M. O., Ramenskiy district, Zhukovo village 26.04.2017
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2
3 Polydrusus tereticollis?

The coloring is very different from this an instance.