Just found this.

‘Seed Ticks’ Don’t Exist
MANHATTAN, Kan. – "Seed ticks" are a case of mistaken identity, not an actual tiny pest.
"Basically, they’re the larval stage of any tick species," said Kansas State University entomologist Ludek Zurek. "In Kansas, that primarily means seed ticks are the larvae of lone star ticks."
As such, they deserve the same respect as their disease-transmitting parents.
"Lone star ticks – one of the most common species in Kansas – need a blood meal in every growth stage except the eggs," Zurek said. "Unlike most ticks, lone stars can and will bite people when they’re larvae and nymphs, as well as adults."