Show mosquitoes two million years old writing on the probable antiquity ot of as shown by the geological record prof irot T D A cockrell of the university of colorado states that the oldest forms positively identified as belonging to the genus otiles or other genera of the mosquito family have bern been found in eocene rocks nod and are probably about two million years old A form known as was described by scudder from the green river beds of wyoming another eocene species has lately been discovered by mr D E winchester of the united states geological survey near cathedral bluff in western colorado and to la to be bc called win chesterl scientific american |