The longer thumb of this species, in comparison with that of Pipistrellus hesperus, was verified by measuring the thumb including its claw and the pad at the base of the thumb in 12 P. s.
"A Synopsis of the American Bats of the Genus Pipistrellus"
Walter W. Dalquest E. Raymond Hall
Consequently, confidence is felt in treating Pipistrellus hesperus and Pipistrellus subflavus as two distinct species.
"A Synopsis of the American Bats of the Genus Pipistrellus"
Walter W. Dalquest E. Raymond Hall
Over the kingdom of Thessaly, in the days of long ago, there reigned a king whose name was Ceyx, son of hesperus, the Day Star, and almost as radiant in grace and beauty as was his father.
"A Book of Myths"
Jean Lang