Identification of Hymenoptera (wasps, bees, ants)

Definitely not Symmorphus angustatus, I found it in my collection.
It reminds me of Ancistrocerus parietinus or A. oviventris (if you close your eyes to the longitudinal furrow on the first tergum). They have such notauli and parietal fossae, and the characteristic feature is a very wide second segment of the abdomen. As for the furrow , you've seen that it can even be found in Odynerus (or Gymnomerus, I don't remember what it was).
Check the second sternite from the side, its leg obscures.

Dolichovespula sylvestris ?
Germany

by the way, I found an article that there are 2 varieties in Germany-Vespa crabro germana and Vespa crabro crabro
http://www.aktion-wespenschutz.de/Wespenar.../horniUnten.HTM

Definitely not Symmorphus angustatus, I found it in my collection.
It reminds me of Ancistrocerus parietinus or A. oviventris (if you close your eyes to the longitudinal furrow on the first tergum). They have such notauli and parietal fossae, and the characteristic feature is a very wide second segment of the abdomen. As for the furrow , you've seen that it can even be found in Odynerus (or Gymnomerus, I don't remember what it was).
Check the second sternite from the side, its leg obscures.

No, Dolichovespula media.
Look at the lower corners of the sides of the prothorax. There should be clear oblique edges.

in the vicinity of Krasnoyarsk. about 10 mm. The first tergite without a sharp break between the vertical and horizontal parts. Sides of the gap. segments without sharp lateral keels, rounded. The longitudinal keel in the center of the segment goes to the rear of the hull. The mustache is completely black. The punctuation of the back and head is dense, dense. The lateral corners of the pronotum are angular. 1-3 tergites with yellow bandages on top, on the 4th tergite torn into spots. Wing caps are dark with small yellow spots, dotted along the outer edge in rare large dots.
as a variant of Allodynerus rossii.

Yes, if you ignore the indented strip on the first tergite, then it is very suitable for parietinus, the second sternite is evenly rounded, the rollers at the base are strongly developed, in the middle longer than on the sides. True, I have a female as determined, now they do not fit together. And the color of the platypus in this case plays a role, in the previously defined one it is completely black, with a part of the platypus adjacent to the antennae smeared with a couple of spots. Confuses straight, not rounded 2 sternite, although the rollers are also developed that this specimen has. (we have already discussed the first copy here.)

Definitely not him. I would define it as Gymnomenus laevipes scandinavicus.

BINGO!! 100% hit rate. It's really him. I was confused by the teguls. Indeed, they are smaller and rounded from the inside. Tentacles of 4 segments. Very poorly visible are two parietal pits, which are closely located and poorly visible due to rough dotted lines, as well as the shape of the platypus and, of course, the structure of the mandibles, the 4th prong at a greater distance, in front of which there is a deep notch. And the distribution of this particular subspecies is indicated in the DV!

I have one specimen of this species with no parietal pits at all, so anything can happen... What is bingo?

Bingo is a game in which numbers are randomly selected, and players must fill in the corresponding numbers on their cards. The first player to fill out the card in accordance with the rules of the draw wins. To indicate his winnings, he usually shouts " Bingo!".

photo 2 sternite, tried on the side, rounded. At the base, the longitudinal rollers are variously long in the middle and along the edges.
and here is a photo of the previously discussed copy, also signed parietinus, the difference from parietum is in the form of rollers, I have parietum, it has rollers of the same length throughout.
In this specimen, the shape of the 2nd sternite is flatter, in my opinion almost flat.

It seems to me that your second one and my second one are the same (A. parietinus) and I call it a rounded shape

well, the fact that they are the same, I will agree, and the fact that it is rounded, I will accept as a fact. Of course, I would like to show my OS specialists. Maxim Proschalykin isn't going to see you there? ))) I would find an opportunity to pass ))))

Sawyer DSC06064.ypg. View - ???
Moscow region, Ramenskiy district, Khripan. 23.06.2012.

Well, the photo of ants from Chisinau, to put it mildly, is not very detailed, but this is clearly not Formica, rather Myrmica.

Well, the photo of ants from Chisinau, to put it mildly, is not very detailed, but this is clearly not Formica, rather Myrmica.

In general, I have little experience in identifying hymenoptera yet. it seems that the views are simple, but you need confirmation from knowledgeable people.  
all collected in Poltava region
No. 1 and No. 2-collected from one ear of cereals on the bank of the Vorskla River in mid-June 2011.
No. 3 and No. 4 - woodlands. early August 2011.
the rest are young pine trees on the sands. early August 2012
but in bembiks confused white stripes

Sphex funerarius m
Prionyx sp. m
Scolia sexmaculata sexmaculata m
Scolia hirta hirta f
Colpa quinquecincta m
Scolia hirta hirta f
Bembix rostrata
Bembix rostrata
Bembix rostrata

Arthur, thank you so much. the second batch of road sedges and bees for identification.
Poltava region, city of Poltava, Leninsky district, right bank of the river. Vorskla, deciduous forest, on the inflorescences of Canadian goldenrod.
August 10, 2012