Identification of Hymenoptera (wasps, bees, ants)

Species do not differ from each other in the number of tergites. The male differs from the female. Female 6 tergites, male 7. But the male differs from the female in the number of segments of the antennae, for example. And in general, the appearance of a male from a female is not a problem to distinguish.
I absolutely can't understand what problems can arise when recalculating abdominal tergites in such a large object as a bumblebee. Without any problems, I do this with an 8x magnifying glass. Are you sure that you have correctly understood what tergite is?

Species do not differ from each other in the number of tergites. The male differs from the female. Female 6 tergites, male 7. But the male differs from the female in the number of segments of the antennae, for example. And in general, the appearance of a male from a female is not a problem to distinguish.
I absolutely can't understand what problems can arise when recalculating abdominal tergites in such a large object as a bumblebee. Without any problems, I do this with an 8x magnifying glass. Are you sure that you have correctly understood what tergite is?

That's it, we need to look for a normal magnifying glass!

Is it possible to identify these bumblebees, or do I need to photograph something separately?

Excuse me, MoskObl., yesterday.

Moscow, Agricultural Academy Park, late April, on a dead pine tree, body length 2-2. 5 cm without ovipositor / antennae / etc. What kind of rider is this? And what are the mites on it, and what is their role: freeloading or hemolymph sucking?

Please help me identify the correspondence that I've already posted in the reports. Photos taken in a bee colony in the vicinity of Alpatievo, Lukhovitsky district of Moscow region, if you are interested, I can specify a point on the map. It looks like there are still 4 views, not 3... (so photos of the first and second views from different angles)

1 Andrena sp. male
2.Andrena sp. a female, maybe Andrena vaga?
3. Nomada sp. female like
4. Sphecodes sp.

Hello, experts!
Please help me determine the type of this flying insect, as it is called:
April 25-30, lives in the Rostov region (~40 km from the city of Rostov-on-Don), flies not very high above the ground, flies into holes in the ground and what is most unpleasant, it is very aggressive and bites, attacks somehow unnoticed"unexpectedly...
Thank you.

Hello, experts!
Please help me determine the type of this flying insect, as it is called:
April 25-30, lives in the Rostov region (~40 km from the city of Rostov-on-Don), flies not very high above the ground, flies into holes in the ground and what is most unpleasant, it is very aggressive and bites, attacks somehow unnoticed"unexpectedly...
Thank you.

and how do you determine gender?

Is it possible to identify these bumblebees, or do I need to photograph something separately?

Maybe the last three are Bombus agrorum (Fabricius, 1787)?

And the first is probably Bombus sylvarum (Linnaeus, 1761)??????

But this is true, just speculation. Which need to be checked.

Good evening to all!
I analyzed the fees of 2008 and got here such a beast, please tell me what it is called .
Caught in the Chelyabinsk region, near Vishnevogorsk, mid-September 2008.

In what verification?

I'm not a bumblebee expert... But I can take photos of individual parts, if necessary?

well, if banal then I think yes )) Although the same pascuorum (which previously seems to be agrorum) is given in such a variety, as I have already given it as an example, that only a specialist gave me the exact label.

Please help me identify the sawfly... Naberezhnye Chelny. 07.05.2012

Is it possible to identify pompilida from the photo?
M. O., Orekhovo-zuyevsky district, 04.05.2012, on the forest road.
The size is about 2 cm.

If anyone knows, please help us identify the sawfly. Taken in Chelyabinsk on May 8, 2012.

There is an option is it a female ?Diprion sp. judging by the sawyere, the angle is not very clear

Added another snapshot. Please take a look.

Please help me! I analyzed the collection of hymenoptera of Simferopol University (TNU) by families, I sorted everything out, but one copy - even the superfamily is not determined (Crimea, Salgira Valley, nature reserve, 04.03.1970s, Mosyakin S. A. leg.).

family Bethylidae