''Pachyanthidium lachrymosum'' is a species of

bee Bees are winged insects closely related to wasps and ants, known for their roles in pollination and, in the case of the best-known bee species, the western honey bee, for producing honey. Bees are a monophyly, monophyletic lineage within the ...

in the genus ''

Pachyanthidium ''Pachyanthidium'' is a genus of bees belonging to the family Megachilidae Megachilidae is a cosmopolitan family of mostly solitary bees. Both that their pollen-carrying structure (called a ''scopa'') is restricted to the ventral surface of ...

'', of the family

Megachilidae Megachilidae is a cosmopolitan family of mostly solitary bees. Both that their pollen-carrying structure (called a ''scopa'') is restricted to the ventral surface of the abdomen (rather than mostly or exclusively on the hind legs as in other b ...

References

* http://animaldiversity.org/accounts/Pachyanthidium_lachrymosum/classification/ * https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=756057 * http://bionames.org/taxa/gbif/1334309 * http://collections.si.edu/search/record/nmnhentomology_11102593 {{Taxonbar, from=Q1999400 Megachilidae Insects described in 1879