Whitish

... which differentiate coagulase + (black pigmented colonies) and coagulase - (grayish, or white)although it's certainly not perfect. By "whitish" in pigment, I'm assuming you have already tested on TGA, or do you mean regular nutrient agar? The latter usually doesn't tell you much.

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How do you "know" that is is not S. aureus? Your findings strongly suggest S. aureus (some stains do have whitish color).

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... could be S. aureus or eidermis but we know it's not. gram positive cocci catalase positive alpha hemolysis facultative anaerobe mannitol fermenter whitish Nothing seemed to match all of these.

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... the Southern Black Widow's hourglass is complete) and typically there is a row of red spots down the middle of the back and possibly some diagonal whitish bands on each side; the bands are typically observed on the younger, more juvenile widows" Case closed.

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... but with slight differences. The body is not banded like the one in the picture, but wholly green (leaf green colour), with banded legs (black/whitish). it has reddish wings or maybe that's just a trick of light i'm not sure. It looks like normal, slim house mosquito (though green instead of ...

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