What is noted about the yellow markings in the species *Hylaeus facilis*?
Answer
The markings are present on the clypeus and sometimes on the face above and below the antennae.
The species *Hylaeus facilis* serves as an example of how variation exists even within the shared characteristic of facial yellow markings. For this specific species, the yellow coloration is documented to extend across the clypeus, which is the area situated below the antennae. Additionally, the markings may sometimes be observed extending to the facial areas located both above and below the antennae. This specific configuration of the yellow pattern is vital because it allows entomologists to distinguish *Hylaeus facilis* from its closely related species within the genus, emphasizing that the detail of the distribution is paramount.
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