The taxiles skipper (Poanes taxiles) oviposits on most any large-bladed grasses.  Here in Northern Utah, I like to use Bromus inermus.  Found in moister, shadier areas of mountain canyons, this grass works well in the lab; both to entice females to lay eggs; but also to feed larvae.  Many hesperine skippers, eventhough specialists in the field, can be generalists in the lab.  (I.e, they will oviposit and feed on many grasses.)