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Peachtree Borer Moth - Synanthedon exitiosa - male

Peachtree Borer Moth - Synanthedon exitiosa - Male
Essex, Ontario, Canada
June 11, 2005
Size: About 15 mm
The second unidentified borer - may be same species as next photo. On Downy Arrowwood (Viburnum rafinesquianum).

Moved from Synanthedon.

Moved from Peachtree Borer up to genus Synanthedon due to indecision as to species.

2583 -- Peachtree Borer Moth -- Synanthedon exitiosa
Bob Patterson

Thanks again, Dr. Patterson
Looks nothing like the female. I would not have guessed it. Thanks again.

Just for the record.....
... I am not entitled to an honorific. No degree here, just a passion :-)

I know it’s been a while since you made this post, but I thought I'd add my two cents also. There are three species that look similar to each other Synanthedon exitiosa, Synanthedon pictipes and Synanthedon viburni. Looking at the occipital fringe (collar just behind the head) in the picture you posted, I think you can rule out Synanthedon exitiosa (Greater peachtree borer), which has black laterally on the occipital fringe not yellow. I would say it is either of the other two I named quite possibly the S. viburni (viburnum borer). I only say that because of the comment you made about the plant it was sitting on and the abdominal band on the second segment is characteristic of that species. With that said, it could be S. pictipes. No way to really tell for sure from you photo. Hope all this helps.


Thanks for raising questions regarding the ID of this moth and for pointing out diagnostic characters. My original comment was not based on these characters and I agree with you that I was in error in suggesting S. exitiosa. In their MONA monograph for this family Eichlin and Duckworth give data shown in the following table for a group of species that they suggest can be confused. These include the description of the occipital fringe (o.f.) and the host plants. All occur in the range/area in question except for S. albicornis.

S. pictipes -- o.f.: blue-black dorsally, pale yellow laterally; Rosaceae
S. exitiosa -- pale yellow dorsally, brown black laterally; Rosaceae
S. fatifera -- blue-black dorsally, pale yellow laterally; Viburnum spp.
S. viburni -- pale yellow dorsally; Viburnum spp.
S. albicornis -- brown-black often mixed with yellow; Salicaceae (willows, but western only)
S. proxima -- dorsally mixed with pale yellow; Salicaceae

Of the two species related to Viburnum it seems to me that S. fatifera is the one with an occipital fringe described as most closely matching this photo. S. pictipes shares the o.f. character but would supposedly be found at the "wrong" plants. I now suggest placing this photo under 2555 - Synanthedon fatifera.

Probably S. viburni
I don't think S. fatifera is correct, due to the lack of yellow spots on the antennae. Also the abdominal markings do not match S. fatifera unless you assume that the band on segment 4 has been rubbed off somehow. The occipital fringe is not always as dense on top and could be yellow dorsally, but just too sparse to see in the photo. I can see if you are going off of that characteristic why you might believe that this is S. fatifera. However, with just the picture to go on I'd place my bet on S. viburni.

Sure not what I am calling fatifera, which has the apical third of the antenna white or cream yellow, and a much broader dark fringe on the end on the forewings. Looks very much like what I call pictipes, which is my guess for this image.

Gary Anweiler

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