Hrathi

Race Description
This is a ancient space going species that predates Humans and other current spacefaring spaces in the Milkyway galaxy.

The Hrathian race resembles human-size Earth centipedes.

Space going race and disappearance
The race once discovering means to travel between the stars, went on to colonize 53 thousand star systems.

Fifty four million years from time of Schlock, the race discovered ruins of a multiple Mega-civilizations across number worlds and artificial planets. Data from these ruins indicated to the Hrathi that these ancient civilization had disappeared within centuries of each other.