SUFFOLK DIPTERA CHECKLIST
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THE DIPTERA OF SUFFOLK PETER VINCENT Introduction The records that form this checklist are from the Watsonian vice-counties of East (v.c. 25) and West (v.c. 26) Suffolk which are of greater extent than the modern administrative county boundaries. Diptera are not well recorded in Suffolk, with few records of even quite common species. Therefore, although records are in the main collected at monad (O.S.1km square) or greater accuracy, in order to assess the relative abundance and distribution of a diptera species the hectad (O.S.10km square) is used as the base recording unit. Suffolk comprises of 54 hectads or part hectads. In this checklist of Suffolk Diptera, the arrangement of families follows as set out in Chandler (1998) and updates (Dipterists Forum, 2022). The classification of British diptera starts with the Lower Diptera (Nemotercera) followed by the Brachycera. Within families, all taxa are listed alphabetically. Altogether there are at present 107 families of diptera recognised within the British fauna, and the British Isles list of diptera currently (July 2022) runs to some 7224 species (of which 41 are recorded from Ireland only) (Chandler, 2022). The layout of the checklist is that for each family the first division is by genus and then by species in alphabetical order. For most families, subfamilies and tribes are also recognised: and the genus can also be divided at subgenus level. For every individual species the species name (in bold type) is followed by the authority, then details of the first record of that species from Suffolk - place, date (with as much accuracy as possible) and recorder (where known). To give an indication of the distribution and the abundance of each species, this is followed by a list of all the hectads each species has occurred and the number of known records (in square brackets). Part Five: Atelestidae, Hybotidae, Empididae, Brachystomatidae, Dolichopodidae. The first three parts of the checklist list all the known Suffolk species of the twentyfive families of the Lower Diptera suborder. Part Four started the second suborder of Diptera, the Brachycera. The Brachycera contains the remaining six infraorders of the British diptera, a total of eighty-one families. The first four infraorders; Xylophagomorpha, Tabanomorpha, Stratiomyomorpha and Asilomorpha, containing eleven families were covered in Part Four. The fifth infraorder the Eremoneura comprises of the Empidoidea and the Cyclorrhapha. The three superfamilies of the Cyclorrhapha will be covered in subsequent parts of the checklist, while this Part Five of the checklist deals with the Empidoidea superfamily. The Empidoidea contains five families, Atelestidae, Hybotidae, Empididae, Brachystomatidae and Dolichopodidae. The Dolichopodidae has remained largely unchanged apart from the transfer of the Microphoridae from the Empididae. However, the dismemberment by Chvála (1983) and by Sinclair & Cumming (2006) of the old family Empididae as interpreted in the monograph of the British species by Collin (1961), has resulted in the now five Empidoidea families.
Trans. Suffolk Nat. Soc. 58 (2022)