The male, female, and egg of a new species of perlid stonefly, Perlest
a golconda are described. Most specimens were captured from the banks
of the Ohio River at Golconda, Illinois. This species is most similar
to P. lagoi Stark, but may be differentiated by wing and body colorati
on, the male internal genitalia, and egg morphology. The addition of P
. golconda brings to 16 the total number of known Perlesta species.