Mellinidae

{{Short description|Family of wasps}}

{{Automatic Taxobox

| image = Mellinus arvensis - Flickr - gailhampshire (1).jpg

| image_caption = Mellinus arvensis

| taxon = Mellinidae

| authority = Latreille, 1802

| subdivision_ranks = Genera

| subdivision =

• Mellinus
• Xenosphex

| subdivision_ref = {{cite web |url=http://www.waspweb.org/apoidea/Mellinidae/Classification/index.htm |title=Mellinidae |last=van Noort |first=S |date=2023 |website=WaspWeb |publisher=Iziko Museums of South Africa |access-date=2024-01-28}}

}}

Mellinidae is a small family of wasps, comprising 17 described species in two genera. These wasps are found in the Nearctic, Neotropical, Indomalayan and Palaearctic realms. This group has traditionally been treated as a subfamily within Crabronidae (Mellininae), but recent phylogenomic studies have shown it to be a distinct family.{{Cite journal |last1=Sann |first1=Manuela |last2=Niehuis |first2=Oliver |last3=Peters |first3=Ralph S. |last4=Mayer |first4=Christoph |last5=Kozlov |first5=Alexey |last6=Podsiadlowski |first6=Lars |last7=Bank |first7=Sarah |last8=Meusemann |first8=Karen |last9=Misof |first9=Bernhard |last10=Bleidorn |first10=Christoph |last11=Ohl |first11=Michael |date=2018-05-18 |title=Phylogenomic analysis of Apoidea sheds new light on the sister group of bees |journal=BMC Evolutionary Biology |language=en |volume=18 |issue=1 |pages=71 |doi=10.1186/s12862-018-1155-8 |issn=1471-2148 |pmc=5960199 |pmid=29776336 |doi-access=free|bibcode=2018BMCEE..18...71S }}