Identification of beetles (Coleoptera)

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14.09.2018 23:05, Fornax13

I'll stand by my opinion. It's not just the color, although the edges of the PRSP are not lightened at all. The dotted line is poorly visible, and this is a subjective sign. But:
1) the two extreme (lateral) flat grooves of the elitr are much wider than the protruding spaces and noticeably wider than the other grooves;
2) the posterolateral corners of the prsp are widely rounded (they do not have a protrusion, are not eroded, are not beveled). These are characteristic features of E. carinatus as opposed to E. sus.

The dotted line is just well visible on the mangy male. And it is not the same as that of European and Caucasian carinatus.
As for the lateral grooves, they hardly differ here: https://upload.wikimedia.org/wikipedia/comm...bst%2C_1783.png
I can't say anything about the posterior corners - in the male, the right side of the pronotum is slightly turned up and the posterior corner is clearly slanted. Another question is whether this is a reliable sign.
Radik, and try to extract aedeagus from the first beetle - just they differ well.

This post was edited by Fornax13-14.09.2018 23: 06

Likes: 1

15.09.2018 8:02, KorvinBF08

Vo! That's better)
In my opinion Polydrusus. Or fulvicornis or tereticollis. Their heads are the same, and the differences are in the shape of the pronotum.

Thank you. I have to apologize for the original photos. It turns out that I put everyone in a dead end just because I took photos that did not allow us to see the diagnostic signs of specific beetles.
In my defense, I can only say that when you see some new object in the bird feed, you always want to hope that it is something trivial, ordinary, that a good specialist can determine from 1-2 general photos. You don't always know when just sharing photos is enough, but when you need to take a special photo from a certain angle so that the diagnostic signs are visible. So in the future, I just ask you to write: "Dmitry, your photos don't give a damn what it is. Take a photo this way and that."

As for Polydrusus, yes, somehow fulvicornis and tereticollis are most suitable. And the limbs, apparently, still from them. But what about under the elytra? In both species, they are not just orange, but seem to be some kind of brown-greenish. Is it because of the white hairs covering the body?

15.09.2018 8:40, Mantispid

Thank you. I have to apologize for the original photos. It turns out that I put everyone in a dead end just because I took photos that did not allow us to see the diagnostic signs of specific beetles.
In my defense, I can only say that when you see some new object in the bird feed, you always want to hope that it is something trivial, ordinary, that a good specialist can determine from 1-2 general photos. You don't always know when just sharing photos is enough, but when you need to take a special photo from a certain angle so that the diagnostic signs are visible. So in the future, I just ask you to write: "Dmitry, your photos don't give a damn what it is. Take a photo this way and that."

As for Polydrusus, yes, somehow fulvicornis and tereticollis are most suitable. And the limbs, apparently, still from them. But what about under the elytra? In both species, they are not just orange, but seem to be some kind of brown-greenish. Is it because of the white hairs covering the body?

Well, yes, in life they are completely covered with a continuous cover of scales. Elytra may not be from them. The most extreme one on the right seems different to me. It is difficult to say anything about the elytra because the differences are mainly in scales.

Likes: 1

18.09.2018 9:06, Barnaba

It is, but the find is not the first or even the second

Thank you. Anything published? In the list of ground beetles of the Moscow region (Fedorenko, 1988), it is given according to the instructions of Jacobsen and Sharova, the author did not know the material from the Moscow region. I also didn't find any other references to points in the Ministry of Defense, and I haven't met them myself in many years (but I didn't look for them specifically). This specimen comes from the Lukhovitsky district, so far 1 specimen per 154 catches*day, but probably out of season. The MO is not included in the CC. At the same time, the more southern species B. eschscholtzii, included in the CC of the entire lower Volga region, was found there repeatedly in spring and not in one specimen, which is why I am surprised.

18.09.2018 14:16, Radik

The dotted line is just well visible on the mangy male. And it is not the same as that of European and Caucasian carinatus.
As for the lateral grooves, they hardly differ here: https://upload.wikimedia.org/wikipedia/comm...bst%2C_1783.png
I can't say anything about the posterior corners - in the male, the right side of the pronotum is slightly turned up and the posterior corner is clearly slanted. Another question is whether this is a reliable sign.
Radik, and try to extract aedeagus from the first beetle - just they differ well.

Thank you so much for your help.
I haven't cooked it yet. I can't even imagine how to approach this without having the tools. I think in the near future to try to master the procedure for extracting edeagus.
In the meantime, a few more aphorisms. Tatarstan, Nizhnekamsk district, Blagodatnaya village, born on 18.06.2018.
You may be able to identify them.
_8_9,_10-apparently one view.
8 picture: _8.jpg

This post was edited by Radik - 18.09.2018 14: 17

18.09.2018 19:44, Dmitry Vlasov

Thank you. Anything published? In the list of ground beetles of the Moscow region (Fedorenko, 1988), it is given according to the instructions of Jacobsen and Sharova, the author did not know the material from the Moscow region. I also didn't find any other references to points in the Ministry of Defense, and I haven't met them myself in many years (but I didn't look for them specifically). This specimen comes from the Lukhovitsky district, so far 1 specimen per 154 catches*day, but probably out of season. The MO is not included in the CC. At the same time, the more southern species B. eschscholtzii, included in the CC of the entire lower Volga region, was found there repeatedly in spring and not in one specimen, which is why I am surprised.

Later, Solodovnikov (2008) pointed out that he clearly saw material from the Ministry of Defense. By the way, I don't know why Fedorenko wrote about the unknown m-l, because there are copies in the ZMMU. Arnoldi 1934, Grunthal 1970 and others

Likes: 1

18.09.2018 23:08, Fornax13

Thank you so much for your help.
I haven't cooked it yet. I can't even imagine how to approach this without having the tools. I think in the near future to try to master the procedure for extracting edeagus.
In the meantime, a few more aphorisms. Tatarstan, Nizhnekamsk district, Blagodatnaya village, born on 18.06.2018.
You may be able to identify them.

9, 10 - A. (Chilothorax) melanostictus. 8-it seems to be the same, but some non-standard drawing
12-as already mentioned, A. (Nialus) variants
11, 13-A. (Euheptaulacus) sus
Yes, you don't need to cook anything - everything is simply arranged there. Soak the beetle, spread the elytra and gently pick it up with a pin.with a needle on top of the abdomen (under magnification, of course), there will be a sclerotized thing among all the tripe, which you will not be able to miss. It is carefully removed, rinsed and examined

Well, if you really want, you can soak it in KOH, and if you can't wait at all, you can cook

19.09.2018 9:29, I.solod

Thank you. Anything published? In the list of ground beetles of the Moscow region (Fedorenko, 1988), it is given according to the instructions of Jacobsen and Sharova, the author did not know the material from the Moscow region. I also didn't find any other references to points in the Ministry of Defense, and I haven't met them myself in many years (but I didn't look for them specifically). This specimen comes from the Lukhovitsky district, so far 1 specimen per 154 catches*day, but probably out of season. The MO is not included in the CC. At the same time, the more southern species B. eschscholtzii, included in the CC of the entire lower Volga region, was found there repeatedly in spring and not in one specimen, which is why I am surprised.

Gruntal, S. Yu., Solodovnikov, I. A., Nikitsky, N. B. Family Carabidae Latreille, 1806-Ground beetles / / Coleoptera Moscow Region: Part 1: monograph / edited by N. B. Nikitsky and B. R. Striganova, Moscow: Berlin: Direct-Media, 2016, pp. 144-294.

Places of discovery. Moscow: roc. Vnukovo; Chukhlinka, 6. VI. 1903 K. A. Grivet (1 copy). D. Bykovo, 2. V. 1934, K. V. Arnoldi (1 copy); okr. Orekhovo-Zuyevo (village of Vlasovo), 19.V. 1956, Slepko (1 copy); Elektrogorsk, bank of the ditch under the foliage, 1. V. 1970, Gruntal (1 copy); Ilinskaya; near the railway station Konobeyevo, 30. V-2. VII. 2001, soils. trap, Nikitsky (1 copy); ibid., 22. V-6. VII. 2004, pochv. traps, Nikitsky (1 copy); Trofimovo railway station, 5. VI-26. VII.2004, Nikitsky (2 copies); Zelenograd, Boldova ruchya valley, ravine, 4.VI.2006, A. O. Benkovsky (1 copy); Bunino village,
12. VI-31. VII. 2008, window trap, Nikitsky (1 copy).

This post was edited by I. solod - 19.09.2018 09: 31

Likes: 1

23.09.2018 13:30, Barnaba

Please help me determine Agonus. Moscow region, Lukhovitsy city district, Chernaya River floodplain, wet (seasonally flooded) floodplain meadow, in glasses with 10% vinegar, 2-23. IX. 2018. Caught 1 copy. Length approx. 8mm. The photo was taken in poor light conditions and the quality is low, but so far there is no better one. Pubescence of the antennae from the 4th (it seems) segment, the prsp is widely rounded at the back, without pronounced posterior angles, but also without obvious wrinkles, dark with a blue-purple tint (in the photo it is slightly enhanced due to illumination with an LED flashlight). The palps, whiskers, and legs are black. Elytra are opaque (female), gray, with different sizes, but b. h. large pits on the 3rd interval (7 pits on the left, 8 on the right, 4 of them basal smaller). In general, it resembles A. impressum in many features, differing in color, lack of gloss of the ndcr and bronze tint, lack of noticeable wrinkles on the prsp, and slightly greater progonisty. The typical impressum and other Olizares have not been found in the biotope (since August of this year).

Pictures:
picture: P1020220_cr_r_Agon.JPG