This is a caddisfly (Trichoptera). The larvae are aquatic, and the adults are often attracted to light, so this one probably came in an open window. The only concern might be that if many insects are entering the building in this way, they could provide food for pests such as Anthrenus. Tony
Dr A.G.Irwin 47 The Avenues Norwich Norfolk NR2 3PH England mobile: +44(0)7880707834 phone: +44(0)1603 453524 On 13 May 2015 at 22:03, Mullen, Kathleen D - WHS < kathleen.mul...@wisconsinhistory.org> wrote: > > I'm not sure what this is, and any help is appreciated. > > > > Thank You, > > Katie > > WHS > > >