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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Chalcidoid Wasps (Chalcidoidea) » Eupelmidae » Eupelminae » Arachnophaga
Photo#796054
Arachnophaga - female
Copyright © 2013 Cotinis

Arachnophaga - Female
Garrett Road, Durham County, North Carolina, USA
June 28, 2013
Size: 4-5 mm
I was sitting under an oak tree and this wasp crawled onto my leg, very ant-like. Captured for some photos, length measured as 4-5 mm. It was very jumpy, and sprang every time the flash fired, escaping after just two shots. See comments on ID--thanks!
Location:
35.967067, -78.980067
Image updated 12/16/20.

Images of this individual: tag all
Arachnophaga - female Arachnophaga - female
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Contributed by Cotinis on 1 July, 2013 - 10:03am
Last updated 16 December, 2020 - 9:59am

Moved--thanks!
Moved from Chalcid Wasps. Thanks so much for the correction and explanation, Gary. And thanks, too, for sharing your expertise on this group with the BugGuide community!
… Cotinis, 2 July, 2013 - 11:14am login or register to post comments

Chalcidoid-Eupelmidae
It actually is a female Arachnophaga (Ashmead). It is difficult to tell from the images, but there is a solid brownish infuscate region behind the marginal vein of the fore wing. In Anastatus, this would be interrupted by a hyaline cross-band or anterior and posterior hyaline spots. Also difficult to tell from the image but the hind femora are compressed, another characteristic of Arachnophaga. You can see in the lateral habitus image what appears to be a white fringe along the posterior margin of the metatibia, which is sometimes diagnostic, as is its comparatively flat head. Note in the lateral image of the Anastatus the frontal surface of the head is more evenly convex. Also in the lateral image of the Anastatus you can see the abdomen is white basally, which is not the case for the Arachnophaga female.
… Gary Gibson, 2 July, 2013 - 6:49am login or register to post comments

 
editor status and image size
Gary: I see that you are a "contributor". With your expertise, you should ask the site administrators to make you a "contributing editor". Even if you do not move images around yourself, or write guide pages, this will give you access to full-size images, which will make ID's much easier in many cases. (The above image, for instance, is 1600 pixels wide, and the linked dorsal image is 1024 pixels on the long side.) As a contributor, you can only see the 560 pixel-wide thumbnail. Your identification skills are likely being hobbled by this restriction.
… Cotinis, 2 July, 2013 - 12:44pm login or register to post comments

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