Abstract: | The Diptera names listed by Theodorus van Swinderen in his list of animals and minerals in the Groningen Natural History Museum are itemized and annotated. Most of the names listed, including those newly proposed, are synonymous
with previously published names. One (Sarcophaga Swinderen, 1822) is a senior synonym of the well-known Sarcophaga
Meigen, 1824. It has been dealt with in a previous paper, and Sarcophaga Swinderen, 1822 is now declared a nomen
oblitum. The following new synonymies are proposed herein: Acolasta Swinderen, 1822 = Sepedon Latreille, 1804, n.
syn. [Sciomyzidae]; Cleona Swinderen, 1822 = Callomyia Meigen, 1804, n. syn. [Platypezidae]; Cleona acuminata
Swinderen, 1822 = Callomyia elegans Meigen, 1804, n. syn. [Platypezidae]; Driope Swinderen, 1822 = Dorycera Meigen,
1830, n. syn. [Ulidiidae]; Macrostoma Swinderen, 1822 = Volucella Geoffroy, 1762, n. syn. [Syrphidae]; Marsupium
Swinderen, 1822 = Sphegina Meigen, 1822, n. syn. [Syrphidae]; Nycteria Swinderen, 1822 = Pipiza Fallén, 1810, n.
syn. [Syrphidae]; Pacystoma Swinderen, 1822 = Medetera Fischer von Waldheim, 1819, n. syn. [Dolichopodidae];
Penthesilia Swinderen, 1822 = Merodon Meigen, 1803, n. syn. [Syrphidae]; Tromera Swinderen, 1822 = Madiza Fallén,
1810, n. syn. [Milichiidae]. Titania Swinderen, 1822 (preoccupied by Titania Meigen, 1800) and its type species Titania
albipennis Swinderen, 1822 are available names, but are considered here as nomina dubia and unplaced within Diptera.
Thericas Swinderen, 1822 is considered unavailable as it is not accompanied by a description or a definition and is based
on an unavailable name. Dorycera Meigen, 1830 is declared a nomen protectum and Driope Swinderen, 1822 is declared
a nomen oblitum; Medetera muralis Meigen, 1824 is declared a nomen protectum and Pacystoma muralis Swinderen,
1822 a nomen oblitum.
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