Identification of Hymenoptera (wasps, bees, ants)

Community and Forum → Insects identification → Identification of Hymenoptera (wasps, bees, ants)

Pages: 1 ...123 124 125 126 127 128 129 130 131... 277

Likes: 1

Likes: 2

Likes: 1

24.01.2014 10:51, AVA

I bow down to the people who define the rally like this. at first I thought that 1 and 3 photos are the same, judging by the length of the stem it is Ammophila and there was a feeling that the sternites there 1 and 2 do not touch each other, unlike photo # 2.
But it seems that I was very wrong and I am still far from determining here and so from the fly
Alexander, what is the difference between photos 1 and 3, can you tell me if the stem is still long?

Don't bow down to anyone. It's all about skill. When thousands of copies pass before your eyes, it is not clear how a working "computer" in your head forms a certain image of a group (family, genus, species...). Well, then we look at specific signs.

1-2 frames:
- 7 abdominal segments (apical blunted at the apex) + long 13-segment antennae - male
-the 1st sternite touches the 2nd (on the 1st frame this is clearly visible, on the 2nd-almost invisible, but the "image" is the same) + the 1st tergite is noticeably swollen relative to the sternite-Podalonia
- body pubescent with thick, well-spaced and mostly black hairs - P. hirsuta
Ideally, it would be good to look at the last segments of the legs for the presence or absence of aroliums, but this is not available, and the above is quite enough.

3 frame:
- 6 segments of the abdomen (apical pointed at the top) + 12-segmented antennae-female
-1st sternite does not touch the 2nd (this can be seen at high magnification) + 1st tergite is not swollen, but smoothly and slightly expanded-Ammophila
- black legs, blue tint of the top of the abdomen and, most importantly, distant pubescence of the upper side of the propodeum (good profile picture, and it is clearly visible) - A. sabulosa

As for the actual length of the stalk (the visible part of the 1st sternite?), this feature is purely specific, and, moreover, sexual.

In males, this "stalk" is relatively longer than in females of the same species. But within genera, the length of the "stalk" is variable.

Likes: 2

Likes: 1

24.01.2014 10:58, akulich-sibiria

Don't bow down to anyone. It's all about skill. When thousands of copies pass before your eyes, it is not clear how a working "computer" in your head forms a certain image of a group (family, genus, species...). Well, then we look at specific signs.

1-2 frames:
- 7 abdominal segments (apical blunted at the apex) + long 13-segment antennae - male
-the 1st sternite touches the 2nd (on the 1st frame this is clearly visible, on the 2nd-almost invisible, but the "image" is the same) + the 1st tergite is noticeably swollen relative to the sternite-Podalonia
- body pubescent with thick, well-spaced and mostly black hairs - P. hirsuta
Ideally, it would be good to look at the last segments of the legs for the presence or absence of aroliums, but this is not available, and the above is quite enough.

3 frame:
- 6 segments of the abdomen (apical pointed at the top) + 12-segmented antennae-female
-1st sternite does not touch the 2nd (this can be seen at high magnification) + 1st tergite is not swollen, but smoothly and slightly expanded-Ammophila
- black legs, blue tint of the top of the abdomen and, most importantly, distant pubescence of the upper side of the propodeum (good profile picture, and it is clearly visible) - A. sabulosa

As for the actual length of the stalk (the visible part of the 1st sternite?), this feature is purely specific, and, moreover, sexual. In males, this "stalk" is relatively longer than in females of the same species. But within genera, the length of the "stalk" is variable.

The sailors have no questions

. Of course I was smart enough to point and zoom in on the photo right away

Thanks!

24.01.2014 15:26, Кархарот

I also thought so at first...
But a closed discoidal cell (oddly enough, but it is clearly visible in the picture) is one of the main signs of Chrysidini.
Claws, of course, are not visible. But the lateral teeth on the apical tergite are perfectly visible.

However, I am concerned about the red belly (in Chrysidea pumila it should be greenish).
In this case, it may well be someone else with a smooth edge of the apical tergite. For example, Chrysura.

Unfortunately, I can't figure out what's wrong with the discoidal cell (I don't have enough experience looking at venation in such images). But the radial cell (a sign of Chrysis s. l.) is also not visible. In general, the Chrysura is longer, the Chrysidea is really all blue-green, and the Hedychrum also has teeth on the third tergite. Of course, I don't know much about spangles, but they often come out of the nests of other wasps and bees, so the general habit of these three genera is well known to me. And I asked my colleagues, they say "definitely Hedychrum, possibly male Hedychrum gerstaeckeri Chevr., 1869" .

Likes: 2