Lasioglossum heterognathus, f, underside head 2, Essex Co. NY
Lasioglossum heterognathus, f, underside head 2, Essex Co. NYThe underside of the head of Lasioglossum heterognathum. An uncommon species that has the feature that can be seen here, which is that the recessed area that holds the folded tongue (the hypostomal cavity) widens out towards the mandibles rather than stays as a parallel sided slot like other Lasioglossum species. Yawn, I know. Photograph by Amanda Robinson.