Complex sentence: They typically have a pennant-like hindwing tail which project outwards at an approximate right angle from the squared-off edge of the tapered tornal area with a smaller tail slightly more forward; the upperwings of these butterflies are largely or entirely colored brilliant blue.
Split into simpler sentences: They typically have a pennant-like hindwing "tail" which projects outwards at an approximate right angle from the squared-off edge of the tapered tornal area. The upperwings of these butterflies are largely or entirely colored brilliant blue.