Need additional day for routine

Good day chaps, posting my first bread today in order to ask for advice. With my current work out, I hit all my desired muscle groups in 2 days. This means that I get frustrated with my resting period and restart my routine before I am perhaps ready.
 
Anyhow, here it is as it currently stands (you may notice I am not the most exercise-educated of fellows).
 
Day one: chest and triceps; bench/incline press, tri dips (maybe some weights, lifting them behind me).
Day two: biceps, back and abdominals; bar bicep curl, chin-ups, weighted sit ups.
 
Initial reaction is probably "dude only does vanity muscles." The thing is, I do rather a lot of cycling which means my legs are already muscly enough for my tastes. So what could I push into a third day? I've been thinking of hitting my obliques, but that could probably be worked into my day two....
 
I also don't hit the gym. My available tools are a bench w/ bar, adjustable free weights and chin up bar.
 
Any advice very welcome and appreciated.
 
Happy lifting chaps.
 
edit: been surfing the forums, gonna drop in some shoulders. Any free weight shoulder exercises? I can probs find some on google, but any advice would be welcome.

If you have the bar for benching,then i would add in over head press on day one,
and deadlift on day two,and bar rows.
and i would add a third day with your first workout so:
mon workout A chest/shoulders/tri
wen workout B back/biceps/abs
fri workout A repeat
2nd week
mon workout B
wen workout A
fri workout  B
ect.that would be my suggestion,also you could go heavy one week/moderated next.