Python 2.7 unknown syntax error

Here is my code

hrs = raw_input("Enter Hours:")
h = float(hrs)
rate = raw_input("Enter Rate:")
r = float(rate)

if hrs <= 40
    pay = hrs * rate
    print pay

else hrs > 40
    pay = hrs * 15.75
    print pay

Here is the error message

486406789.415.py", line 6
    if hrs <= 40
               ^
SyntaxError: invalid syntax