Identification of Hemiptera

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24.02.2021 11:02, kovyl

The problem here is not so much with the photos as with the quality of the beetles themselves. Are they probably from the liquid, from the traps?
1 -- I think it is Adelphocoris quadripunctatus (Fabricius, 1794);
2 -- I will not say anything from a photograph of such a specimen;
3 -- Lygus rugulipennis (Poppius, 1911);
4 -- I will not say anything from a photograph of such a specimen.

Yes, from a liquid. Mowing is performed with a net in which a small removable bag is attached to the end of the bag. After that, the bag is disconnected and placed in a container with 70% alcohol. Probably, for better security, the fees should be sorted out as quickly as possible? I had them waiting in the wings for quite a long time (3 months).
You can generally put individual test tubes in 70% alcohol, but it will be inconvenient to take photos. OK, I'll stick it on. Is entomological glue suitable for this? And what is the best way to stick it on?
Thank you for the definitions!

24.02.2021 23:14, Triplaxxx

Entomological glue is certainly good. Most bedbugs can be glued to the abdomen, just like beetles. But some have diagnostic signs on the underside, for example, in Acanthosomatidae, Gerridae, and some Pentatomidae. They must be mounted so that you can see the bottom, then prick them. Mirid, in order to avoid breaking off the legs and mustache, is best glued on its side, without straightening. Well, before gluing, for those who need it, we immediately remove the pigophore (and the terminal parts of the abdomen in females) and glue them side by side without processing them. I once used sugar syrup for this purpose. Then, when identified, they can be easily peeled off with a micro-drop of water. When some beetles, especially myrids (as well as flies, webs, etc.) are removed from liquids, their wings may deform. To avoid this, you need to spread their wings directly in the liquid on a piece of filter paper (upside down) and together with this piece of paper transfer the insect to a large piece of filter paper (napkins) and wait until they dry out a little.