How long does it take for darkling beetle to get ready to lay eggs?

a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, now i know my a, b, c,'s, next time won't you sing with me?!?!?!?!?!