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Fly - Leskia similis - male

Fly - Leskia similis - Male
Allison Park, Allegheny County, Pennsylvania, USA
August 11, 2014

Images of this individual: tag all
Fly - Leskia similis - male Fly - Leskia similis - male

Moved from Leskia.

Moved from Leskia similis.

Moved from Leskia.

Leskia similis (Townsend), male
ID'd from specimen, now a photo-voucher. Thanks John.

I don't know of a key to this genus. There are two described species in eastern North America, L. similis and L. depilis.

However, it may very well be L. similis. Townsend (1916) described the genera Leskiopalpus (for calidus, a synonym of depilis) and Myobiopsis (for similis), both currently considered synonyms of Leskia. In creating these two new genera, he somewhat tangentially gave some character states for the two species. Of Myobiopsis he says in part: "Front and face about same length in both sexes. Inner vertical bristles present in male. Proboscis shorter." Of Leskiopalpus he says in part: "Proboscis stout, part below geniculation not as long as one eye. Palpi longer than antennae, curved, much widened on apical half, almost as wide as antennae."

In the specimen at hand, the proboscis (below the geniculation) is a bit longer than the height of an eye, and the palps are not longer than the antennae nor are they widened. These characters and comparison to a photo of L. depilis at TachImage Gallery leads me to exclude L. depilis and tentatively call this fly Leskia similis (Townsend).

Jim O'Hara says:
"I have just looked in our collection at the two eastern species of Leskia, L. depilis (Coq.) and L. similis (Tnsd.). The most obvious difference I can see between them is in the length of the proboscis. In L. depilis the prementum is about as long as eye height (e.g., see whereas in L. similis it is at least as long as head height."

See also
See also Manual of Nearctic Diptera Tachinidae figure 120 on page 1230.

I'll have to photograph the head. Probably should put this at genus level.

Or send an email to Canada.

Head view added

will drop an email to Jim

Sexual character
Apically broadened palpi are often a sexual character. The type of calidus is female. I think the TachImage gallery photos of depilis show a difference.

yes they do
Palps of the fly above are very thin and narrow, unlike either depilis image. Also noticing the third antennal is longer and thinner than either image of depilis.

Moved from Leskiini.

Tachinidae: Leskia sp.
Tachinidae: Leskia sp.

Moved from Tachinidae.

Moved from Flies.

Probably Leskia
Probably Leskia.

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