Adam, I am not sure how to interprete your message, because it seems you collected mason bees in the Seattle area but your signature indicates Virginia. In any event, concerning your questions you could contact a very enthusiastic Mason bee propagator in Bellingham (WA) who has been producing large numbers of mason bees in little shelters and also wrote a small booklet on the subject. Unfortunately, he is not hooked up to the internet (yet). His address; Brian L. Griffin 1607 Knox Avenue Bellingham, WA 98225 U.S.A. ph. (206) 733-3283 fx. (206) 647-2988 You may also contact Dr. Philip Torchio at the USDA Bee Research Laboratory, Utah State University, Logan, Utah. His lab has been involved in non-Apis pollinators for years. Here, in B.C. we are also involved in Orchard MAson bees. You are welcome to some of the information we have. regards, Paul van Westendorp [log in to unmask] Provincial Apiarist British Columbia, Canada