A Victorian cabinet card photograph of two brothers in their dapper suits.  The younger boy is wearing britches with long dark stockings.  The older boy is wearing long pants. 

Both have a cut away jacket, although each different in styling.  The younger boy's dress shirt is a round collar with a tied bow.   The photographer is P.F. Adelsback, 1822 Mariposa St., Fresno, California.  No other information available. 

Researching children's clothing from the Victorian era?  Here's a nice example of age difference of what each child is wearing.