This is the forewing of a dragonfly. The wing venation pattern is obvious using this technique, and small spines are present on many of the veins, especially the distal veins towards the wing tip. We produced this image without any special preparation of the subject and without damaging these delicate wings. Images: Dylan Wainwright and Wellcome Library, London (http://bit.ly/2AkcT1J).

This is the forewing of a dragonfly. The wing venation pattern is obvious using this technique, and small spines are present on many of the veins, especially the distal veins towards the wing tip. We produced this image without any special preparation of the subject and without damaging these delicate wings. Images: Dylan Wainwright and Wellcome Library, London (http://bit.ly/2AkcT1J).