Speyeria hydaspe viridicornis - 'Greenhorn Mountains' Hydaspe Fritillary
A nice, fresh Speyeria hydaspe viridicornis nectaring on roadside mint posed for plenty of photos for me on July 9, 2017; the two below are this same butterfly.
Speyeria hydaspe viridicornis - 'Greenhorn Mountains' Hydaspe Fritillary
Same; this was along Hwy. 155 in Alta Sierra, not far from the turn to Shirley Meadows, a classic location for these.
Speyeria hydaspe viridicornis - 'Greenhorn Mountains' Hydaspe Fritillary
The underside of Speyeria hydaspe viridicornis is distinctive. Then again, both sides have a rich, dark aspect that sets them apart.
Speyeria hydaspe viridicornis - 'Greenhorn Mountains' Hydaspe Fritillary
I believe this was my first shot of Speyeria hydaspe viridicornis, from its classic location at Shirley Meadows in the Greenhorns from July 20, 2012.
Speyeria hydaspe viridicornis - 'Greenhorn Mountains' Hydaspe Fritillary
From further north at Lloyd Meadow later on the same day as the one just above: a fresher Hydaspe fritillary.

©Dennis Walker