The three species Hylaeus amiculus, H. amiculinus and H. euxanthus are closely related and are alike in appearance. The size of these images makes it difficult to see the most important distinguishing features, but H. amiculus has less yellow on the legs than the other two species.
Hi Helen. Thanks for your photos. I have downloaded the original photo no. 1, cropped it and added it back to be used on the Species page. See: https://canberra.naturemapr.org/species/47363