Identification of Hymenoptera (wasps, bees, ants)

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30.09.2013 17:03, Кархарот

Good afternoon!
Maybe someone can help me determine the membrane is not at the stage of imago, and cocoons.
Here's an example:
1. These are Osmia (fig. 3877)
2. These are Shertobits (fig. 3865)
3. These Are Litho Cutters (fig. 3882)
4. I don't know who it is (fig. 3862)
The septa are made of chewed greens, as is usually the case in solitary wasps, but the phycalia are clearly from eating pollen like bees. I don't hope for an exact answer, at least what your assumptions are. In the end, what I need is to find out the time of departure of this insect.
I hope for your help.

4. This is also an osmium, just another subgenus (Helicosmia). Open one cocoon carefully and the imago will sit there. They will fly out a little later # 1. It is better to open the largest cocoon, there will be a female, which is easier to determine in this subgenus (photo of the head in full face is mandatory).

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30.09.2013 19:41, apismen

4. This is also an osmium, just another subgenus (Helicosmia). Open one cocoon carefully and the imago will sit there. They will fly out a little later # 1. It is better to open the largest cocoon, there will be a female, which is easier to determine in this subgenus (photo of the head in full face is mandatory).

Thank you again! To be honest, not really hoping for an answer on the forum, I sent photos to the Doctor of Biological Sciences from the Tavrichesky National University. Vernadsky. He replied: The nests in the photos you sent are nests of blue osmium (Osmia coerulescens).
It is important that I got the answer to the main question. These are osmia and they need to be displayed simultaneously with O. rufa, that is, in April. If everything goes well, I will put up a photo in the spring, then we will determine exactly who it is!
P.S. These bees come from the Yaroslavl region.

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01.10.2013 11:49, Кархарот

I'm already confused about what kind of Eumenes we're discussing, so here's the pictures again.

Eumenes ?coarctatus

Voronezh, mixed forest, summer

2 Liparus is not a female but a male.

Ukraine, Rivne region, September 16.
Eumenes coronatus ??

And this is a female.

So, the key features of eumenes in males are the shape of the platypus, the last segment of the antennae, punctuation of the last sternite, and to a lesser extent pubescence. In females, the platypus is more uniform, the antennae are generally the same, so you have to determine the pubescence and shape of the segments. But these signs vary quite a bit.
Based on the variability spread in both photos, there may be 4 species: E. coronatus, E. papillarius, E. coarctatus, and E. pedunculatus. About E. pomiformis generally forget, it is found to the south and not so hairy. Now further, - in color and strong pubescence, all photos are most similar to E. coronatus, but the first segment is too thick for this species, which gives reason to suspect dark forms of E. coarctatus or E. pedunculatus. So you need to look at the pubescence of the second segment of the abdomen from below, if it is the same as from above, then E. coronatus, if not-E. coarctatus or E. pedunculatus. Least likely is E. papillarius.

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01.10.2013 11:56, Кархарот

Thank you again! To be honest, not really hoping for an answer on the forum, I sent photos to the Doctor of Biological Sciences from the Tavrichesky National University. Vernadsky. He replied: The nests in the photos you sent are nests of blue osmium (Osmia coerulescens).
It is important that I got the answer to the main question. These are osmia and they need to be displayed simultaneously with O. rufa, that is, in April. If everything goes well, I will put up a photo in the spring, then we will determine exactly who it is!
P.S. These bees come from the Yaroslavl region.

Yes, Osmia ca erulescens is the most likely option, based on the fact that the cocoons are white (in other species it is darker), but you never know (the imago is always better)...

Keep in mind that the student of this very doctor sometimes looks at the forum.

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03.10.2013 11:07, AVA

dear friends, how to distinguish the genera Lestica and Ectemnius except by the fovea at the inner edge of the eyes?

I do not know what this question is related to, but I dare say that it is due to the lack of a head in the instance.

Lestica and Ectemnius are phylogenetically very similar taxa, the distinctive features of which are rather vague. This is especially true for some exotic groups of species. In relation to our people living on the territory of Russia, everything is somewhat simpler, even without taking into account the parietal grooves.

1. Coloring
Lestica
- black with yellow spots of different sizes on the chest and abdomen; in some species, the base of the abdomen is reddish-red.
Ectemnius
- black with yellow spots of different sizes on the chest and abdomen; red-red color of the base of the abdomen is unknown

2. Sculpture
Lestica
- as a rule, in the form of a rough dotted line (the diameter of the dots is not less than the gaps between them) on all tergites of the abdomen and, especially, on the chest; less often in the form of a uniform and moderate dotted
line-the top of the forehead is roughly dotted
Ectemnius
- as a rule, in the form of moderate punctuation (the diameter of the dots is less than the gaps between them), shagreen and longitudinal and / or transverse wrinkling; if the abdominal tergites are clearly dotted, then mainly on 1-2 tergites
-the top of the forehead is slightly dotted or leathery and not dotted

3. Body fragments
Lestica
- the segments of the male's antennae are not modified or slightly convex from below; the apical segment is sometimes curved
- the head of the male of some species is sharply narrowed behind the eyes
- the parietal eyes are usually arranged in a rectangular or equilateral triangle
- the segments of the front legs of the male of some species are more or less strongly flattened and expanded
- the apical tergite of the female is flat triangular or narrowed to the top
Ectemnius
- the segments of the male's antennae are not modified or with more or less developed recesses and protrusions; sometimes the entire flagellum is flattened, with expanded segments
- the male's head behind the eyes is not narrowed, only in some species it is slightly narrowed
- the parietal eyes are usually located in an obtuse (rarely rectangular) triangle
- the segments of the male's forelegs are without extensions
- the apical tergite of the female is usually strongly narrowed to the apex

4. Biology
Lestica
- settle in dry wood or soil, arranging linear nests
- hunt imagos of small lepidoptera, using their wings as the lining of the inner walls of cells, and placing the bodies of victims inside the cell
Ectemnius
- settle in dry wood, occasionally occupying and expanding the abandoned nests of other wasps and bees in clay slopes
- hunt dipteran imagos (one species-small lepidopteran imagos)

That's about it. I hope this helps.