Muscidae

Couri, Márcia Souto, de Carvalho, Claudio J. B. & Pont, Adrian C., 2012, Taxonomy of the Muscidae (Diptera) of Namibia: a key to genera, diagnoses, new records and description of a new species, African Invertebrates 53 (1), pp. 47-47 : 48-50

TAXONOMY Key to the genera of Muscidae from Namibia (PRGL¿HG IURP &RXUL et al. 2006)

1 Proboscis adapted for piercing: elongate, strongly sclerotised and non-retractile, tapering from a broad base to a slender apex, with labella atrophied....................2

– Proboscis not adapted for piercing: moderately or weakly sclerotised and retracted LQWR KHDG, QRW WDSHULQJ VWURQJO\ WR DSH[, ZLWK ODEHOOD ZHOO GHYHORSHG, RIWHQ ÀHVK\ ................................................................................................................................4

2 Palpus shorter than half length of proboscis; 1 species ........... Stomoxys Geoffroy

– Palpus about as long as proboscis..........................................................................3

3 Arista with dorsal branches only; notopleuron without setulae; 1 species .............. ......................................................................... Haematobia Le Peletier & Serville

– Arista with dorsal and ventral branches; notopleuron setulose; 1 species............... .............................................................................................. Haematobosca Bezzi

4 +HDG DQJXODU LQ SUR ¿OH,ZLWK ORQJ IDFH DQG SRVWSHGLFHO;DQWHQQD ORQJ,LQVHUWHG DERYH PLG OHYHO RI H\H; SUHVXWXUDO GRUVRFHQWUDO VHWDH YHU\ VKRUW DQG ¿QH, DOPRVW LQGLVWLQFW from ground setulae; 11 species............................................. Atherigona Rondani

– Head shape not as above; antenna short or long, inserted below mid level of eye; presutural dorsocentral setae well developed, very rarely not differentiated from ground setulae........................................................................................................5

5 Anepimeron setulose..............................................................................................6

– Anepimeron bare..................................................................................................12

6 Lower calypter of the Musca - type, i. e., LQQHU PDUJLQ DW ¿ UVW IROORZLQJ PDUJLQ RI scutellum then diverging abruptly outward into more-or-less broadly truncated apical margin..........................................................................................................7

– Lower calypter of the Phaonia - type, i. e., inner margin diverging immediately and at right-angles from supra-squamal ridge; tongue-like in shape..........................10

7 Body black or bluish black, not metallic shiny green or blue; mid tibia without ventral seta...................................................................................................................8

– Body shiny metallic green or blue; mid tibia with strong ventral seta..................9

8 Vein M with an angular forward bend towards vein R 4+5; 18 species ...................... ....................................................................................................... Musca Linnaeus – Vein M with a smoothly rounded forward curve towards vein R 4+5; 1 species ........ .................................................................................. Morellia Robineau-Desvoidy

9 Suprasquamal ridge setulose ( Fig. 2 ); greater ampulla setulose; 2 species ............. ...................................................................................................... Neomyia Walker

– Suprasquamal ridge bare; greater ampulla bare; 3 species ...................................... ................................................................................... Pyrellia Robineau-Desvoidy

10 Palpus greatly enlarged in apical part, spoon-like; parafacial with setulae; prosternum bare; all wing veins bare; 4 species.................................................. Lispe Latreille

– Palpus not enlarged, narrow; parafacial bare; prosternum setulose or, if bare, base of vein R 4+5 with setulae on lower wing surface..................................................11

11 Prosternum bare; 3 or 4 pairs of postsutural dorsocentral setae; acrostichals 3:3, strongly developed; 1 species .......................................... Pseudohelina Vockeroth

– Prosternum setulose; 2, 3 or 4 pairs of postsutural dorsocentral setae; acrostichals 1:2, developed; 2 species ................................................... Dichaetomyia Malloch

12 Wing with subcosta running in smooth even curve from humeral cross-vein to costa; body colour metallic black or blue; gena with a strong differentiated upcurved seta; Ƃ RFHOODU WULDQJOH VKLQ\, ORQJ RU VKRUW, DOPRVW UHDFKLQJ OXQXOH; Ƃ IURQV ZLWK RQH SDLU of proclinate orbital setae and one pair of inclinate interfrontal setae; 2 species .... ............................................................................... Hydrotaea Robineau-Desvoidy

– Wing with subcosta with a slightly sinuous course from humeral cross-vein to costa, not smoothly bowed; body colour not metallic black or blue; gena without a GLIIHUHQWLDWHG XSFXUYHG VHWD; Ƃ RFHOODU WULDQJOH VKRUW DQG GXVWHG; Ƃ IURQV ZLWKRXW proclinate orbital or inclinate interfrontal setae...................................................13

13 Wing with at least 1 setula on ventral surface of Rs node or base of R 4+5 ...........14

– Wing without setulae on ventral surface of Rs node and on base of vein R 4+5 ....16

14 Prosternum with many lateral setulae; proboscis with labella reduced; prealar seta absent; anterior katepisternal seta present; 4 species ............................................... ........................................................................... Limnophora Robineau-Desvoidy

– Prosternum bare or only with 1–2 setulae on either side; proboscis with labella developed; prealar seta present or absent; katepisternal seta present or absent...15

15 Anterior katepisternal seta absent; lower calypter broad and truncated, of the Musca - type (see couplet 6 for description); vein R 4+5 without dorsal setulae; 1 species..... ............................................................................ Graphomya Robineau-Desvoidy

– Anterior katepisternal seta present; lower calypter not broad and truncated, tongueshaped, of the Phaonia - type (see couplet 6 for description); R 4+5 with a few dorsal setulae basally [other characters: veins Sc, Rs and M setulose, usually as follows: vein R before humeral cross-vein, on both surfaces; basal part of Sc, on both surfaces; ventral surface of R 4+5 almost to cross-vein r–m; both surfaces of M to beyond cross-vein dm–cu; ventral surface of Cu]; 1 species............... Dimorphia Malloch

16 Proboscis with labella not reduced and prestomal teeth barely developed, and prementum dusted; prealar seta present; katepisternal setae not 1:1:1.....................17

– Proboscis with labella usually reduced and/or prestomal teeth strongly developed, and prementum shiny, undusted; prealar seta absent; katepisternal setae 1:1:1, placed at the angles of an imaginary equilateral triangle................................................19

17 Hind tibia with 1 strong posterodorsal seta (calcar) in apical third; anterior postsutural intra-alar seta placed behind level of supra-alar seta; 1 species................................ ................................................................................... Muscina Robineau-Desvoidy

– Hind tibia without calcar; anterior postsutural intra-alar seta placed differently...18

18 Arista bare; sternite 1 with row of setulae along posterior margin; prealar seta absent; ƃ H\H ODUJH LQ SUR ¿OH, RFFXS\LQJ PRVW RI KHDG; ƚ VSHFLHV ........................................ ................................................................................ Gymnodia Robineau-Desvoidy

– Arista plumose, with longest individual branches longer than width of postpedicel; VWHUQLWH ƚ EDUH; ƃ H\H LQ SUR ¿OH QRW PDUNHGO\ ODUJH; 4 VSHFLHV ................................. ...................................................................................... Helina Robineau-Desvoidy

19 Katepisternal setae 1+1–3; ovipositor of Mydaea - type, short, with spinose hypoproct; 1 species ..................................................................................... Spilogona Schnabl

– Katepisternal setae 1:1:1, placed at angles of imaginary equilateral triangle; ovipositor elongated, with setulose hypoproct; 1 species ............................. Coenosia Meigen

Figures

Figs 1–5. Musca fragilis sp. n., male: (1) sternite 5; (2, 3) cercal plate and surstyli, dorsal (2) and lateral (3) views; (4, 5) phallic complex, dorsal (4) and lateral (5) views.