Acalyptratae
The Acalyptratae are a subsection of the Schizophora, commonly referred to as the acalyptrate muscoids (or simply acalyptrates). It is a very large assemblage, exhibiting very diverse habits, with one notable and perhaps surprising exception; no known acalyptrates are obligate blood-feeders (hematophagous), though this life history is common throughout the remaining Diptera.
The name Acalypterae was first used by Justin Pierre Marie Macquart in 1835 for a section of his tribe Muscides for all acalyptrates (except conopids) plus scathophagids and phorids.
The name refers to the lack of calypters in the members of this group of flies.
Classification
Subsection Acalyptratae