oh Tom this is very cool! it looks like it's an 'oblique' gynandromorph, as per this paper! I've never quite seen one with such defined patterning.
www.researchgate.net/publication/...
PDF | Gynandromorphs are creatures where at least two different body sections are a different sex. Bilateral gynandromorphs are half male and half... | Find, read and cite all the research you need on...