Citation

Wolda H (1967) Reproductive isolation between two closely related species of the Queensland fruit fly Dracus tryoni (Frogg) and D. neohumeralis Hardy (Diptera : Tephritidae) I. Variation in humeral callus pattern and the occurrence of intermediate colour forms in the wild. Australian Journal of Zoology 15, 501-513.

https://doi.org/10.1071/ZO9670501