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Syrphid - Ferdinandea - female

Syrphid - Ferdinandea - Female
Mark Twain National Forest Hercules Glade, Taney County, Missouri, USA
June 9, 2010

Images of this individual: tag all
Syrphid - Ferdinandea - female Syrphid - Ferdinandea - female Syrphid - Ferdinandea - female

The eyes meeting along the top of the head = ♂

Not sure what to make of this (or your other Ferdinandea posts)
Perhaps your specimens are at eastern edge of the range of F. croesus? According to the keys in Shannon (1924) and Hull (1942), all (nearctic) species of Ferdinandea other than F. croesus have darkened posterior bands on the 2nd and 3rd tergites. I see no such darker bands here. However, the arista on F. croesus is supposed to be black, whereas in your specimen here it appears yellowish (except near the tip, which looks black).

F. dives is described by Hull as having legs yellow, arista black-tipped and longer than antenna, and Stone(1) lists it from Missouri. But again, it is supposed to have a darkened posterior band on tergites 2 & 3. Also, it seems that Thompson & Skevington believe F. dives should be a synonym of F. buccata...see here.

Further thoughts
After further study of your other posts, and of Hull (1942) and Shannon (1924)...I'm thinking they are all specimens of the variable species F. buccata to which F. dives has been synonymized. See comments here and here.

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