How about Saurians as is, EXCEPT medium reproduction (Meaning less than Humans at eighty percent) a minor intolerance to cold (worse than other races) and increased aggression at very high temperatures? (a conditional diplomacy, charisma penalty) For example, living in mid nineties temperatures would make them seem just fine but once it's 105 they're a little grumpy and at Arizonan like temperatures of 115, they need to stay calm and only congregate among friends, lovers, and family?