Onthophagus from Panamá

Hellow friends:

Please can you help me with the identification of these Onthopagus ?, the pictures are not very pretty because in this moment I have not a good camera and I don't want to extract it out of the pins for not damaging more the specimens, I think that are two species of Onthophagus apparently ?, these are the Canal Zone in Panama, if somebody knows these species I will thank your help.

cordial Greetings
Carlos

Onthophagus sp. Picture 1:


Onthophagus sp. Picture 2:


Onthophagus sp. Picture 3: