Silvery Checkerspot Butterfly

Denis, you have already 3+ for Nycteis, so at least 2 others would agree. Here you have the link for Phyciodes tharos: http://bugguide.net/node/view/411/bgimage You may compare yours with these ones and you will not see the white spots on the hindwing and if you take the row/band on the right side of the forewing you also note some differences: look at the 2 spots below, quite "long", so more pins as spots in yours and Nycteis. http://bugguide.net/node/view/429

Sorry, tricky iPad. Here is the link for the reference http://bugguide.net/node/view/572195/bgimage If you look at your hindwing you see there some white spots, to my knowledge Nycteis is the only Checkerspot with such spots there.