Juan, I do get a little worried by some of your pictures. Many of them show clearly immature specimens that have not produced perithecia or discharged their ascospores. This picture is a good example. The majority of the specimens here are immature. I see two that are producing perithecia but even then it is impossible to be sure if these have reached maturity to shoot the spores. It is these spores that infect the next generation of larvae (in this picture the larvae appear to be Scarabeidae). If you carry on collecting like this there will be no future generations of Cordyceps