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Photo#1435210
soldier fly - Odontomyia tumida - female

soldier fly - Odontomyia tumida - Female
Benton Crossing Road near alkali lakes, Mono County, California, USA
August 10, 2017

Images of this individual: tag all
soldier fly - Odontomyia tumida - female soldier fly - Odontomyia tumida - female soldier fly - Odontomyia tumida - female soldier fly - Odontomyia tumida - female soldier fly - Odontomyia tumida - female

"tumida" = swollen
The epithet tumida is latin for "swollen"...and indeed, studying the MCZ type images for tumida and arcuata below (click thumbnails to enlarge)...one sees the face of the former is far more "forwardly swollen" than that of the latter:

      tumida Odonotomyia tumida from MCZ         arcuata Odonotomyia arcuata from MCZ

I made careful measurements of the extent to which the faces project forward in these images: in the tumida type image, it extends 2/3 (≈0.66) the eye width; in the arcuata type image it extends 1/3 (≈ 0.33) the eye width; and in Joyce's photo above, it extends forward 7/13 (≈0.54) of the eye width.

Note that in couplet 28 of the key of James(1936)...and in the descriptions of tumida given in Banks(1926) [see here] and James(1936) [see here]...this character was stated as "Face in lateral profile extending forward as far as width of the eye" (versus "Face extending forward much less than the width of the eye" for arcuata). This character was not repeated in the keys of James(1960) and James(1974)...and I'm thinking that the extent of this forward projection character (i.e. a "full eye's width") may have been overstated in the key and descriptions prior to 1936.

Moved tentatively to Odontomyia tumida
Moved from Odontomyia arcuata-group.

See comment above, and those below 1st image of this series.

Moved
Moved from Stratiomyini.

Moved
Moved from Soldier flies.

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