I created something similar by setting the spacing to something that looked good for my particular brush, and then under Shape Dynamics I set everything to "Off" except for Angle Jitter, which I set to 0% and set it the control to "Direction." Then the best way to get everything to space out correctly is by drawing a path with the pen tool that you'd like the brush to follow and then right click the path and stroke path, set it to brush (after you've selected your brush and set the proper dynamics) and you should have a (nearly) perfect rendition. Now all you have to do is find or make a brush similar to that. If you could find a dragonfly brush it might work, although you might have to chop off most of the body and save it as a new brush.