Identification of Hymenoptera (wasps, bees, ants)

Well, once on the flowers of buttercups, it means Chelostoma florisomne

  Diplazontinae, most likely

  Cryptinae

Chelostoma florisomne was previously identified, but it is smaller (about 7 mm). This one is bigger and shaggier

I don't know who determined what before, but Chelostoma florisomne (Linnaeus, 1758) is the largest member of the genus that we have.
Just do not use the "green" determinant in the definition of this type. There is
a photo of Chelostoma florisomne (Linnaeus, 1758)

Please help with the definition of pompilida. Cryptocheilus fabricii  . Georgia, Gori, end of May.

I'm not arguing. Posted here earlier, entry from 17.04 URL 9928, identified in the same place (URL 9929). Apparently this is a male
Here for comparison:

Ciscaucasia, the other day, size about 10 mm

Help, please, to determine by photos
1
2
3

Simferopol neighborhood, lavender field. June 23.

Surroundings of Kirovo-Chepetsk, Kirov region. 24.06.2019.
Tenthredinidae?

Surroundings of Kirovo-Chepetsk, Kirov region. 24.06.2019.

Hello, here is a small fly (bee, wasp) they live in a hole, one of them got out of the hole and quickly cut a leaf at the entrance to the hole.
Lipetsk, taken today.

Working OS Vespula vulgaris.
P.S. I thought at first that it was really "small". But no.

Now I figured it out, thank you!
But the main question remained, I still did not understand - how harmful or useful they are in my garden next to the hives. Kill them or let them live?
So far, they don't bring much trouble, but this is still...
Hornets were also not bothered at first, but then they were not allowed to climb into the attic in the bathhouse.

Can you help me with the bee?" MO, early June, 9-10 mm
venation turned out to be Halictus, but I didn't find anything like this...

Now I figured it out, thank you!
But the main question remained, I still did not understand - how harmful or useful they are in my garden next to the hives. Kill them or let them live?
So far, they don't bring much trouble, but this is still...
Hornets were also not bothered at first, but then they were not allowed to climb into the attic in the bathhouse.

I didn't find it, because by "venation" it's Andrena.

Is this one of the leafcutters? For example, Hoplitis?
MO, July, 10 mm

As Hierophis recently put it, it's a hybrid of a nymph and a dominant . A joke of humor. Whiskers like a nymph, sternites of the abdomen like a dominula. I am still inclined to P. nimpha, since no one seems to have described the dark upper flagella of the antennae in the dominula, but here is the b. h. yellow last sternite in the nymph, I met in Rusina's works (however, only in the color scheme, not in the photo). I've never seen anything like it in our country. And where is it photographed?

Please help me with the definition. Sevastopol, 06.07.2019, on the inflorescences of wild onions. Snapshots of a single individual.