I photographed this Queen of Spain Fritillary this afternoon (Wed 14th March) in central Spain. When I looked at it on the computer I was surprised to see what looked like a translucent jelly surrounding the body.(Reduced image inserted below, full size image attached.)
Today (Sunday) I found another Queen of Spain Fritillary in more or less the same place and I managed to get closer and a much better photo. I attach a crop that compares with the one in my second posting. In the latest photo the hairs on the body are clearly visible and a comparison of the background portions of the two photos shows that the earlier photo suffers from blurring due to the amount that it was necessary to blow up the image (even though the markings on the wings looked sharp). I'm inclined to think that the effect of the body being coated in some sort of jelly is merely reflections from the hairs being blurred and looking non hair-like.
Unless someone is now going to tell me that butterfly bodies can be wet soon after hatching from the chrysalis I'm going to declare this a trick of the light in that particular photo.