Some rare in Sweden (Diptera: Syrphidae)

JEROEN VAN STEENIS

van Steenis, J.: Some rare hoverflies in Sweden (Diptera: Syrphidae). [Nigra siillsynta blomflugor i Sverige (Diptera: Syrphidae).1 - Ent.Tidskr. 119 (2):83-88. Lund, Sweden 1998.

Records for rare and redlisted Swedish hoverflies caught by the author in the years 1996 and 1997 are reported. Some additional recent records from other collections are reported too. Short notes are given on some species about the distribution in surrounding countries. One species new to Sweden, Volucella inJlata, is reported here, but the question is raised whether this species and Me rodon clavipes really have been caught in Sweden. A new non- genitalic characteristic is proposed for separating the males of Brachyopa obscura and B. testacea. The most striking difference between the females of Syrphus admirandus and S. ribesii is figured.

J. van Steenis, Department of Zoology, Uppsala University, Villav. 9, 5-75236 Uppsala, Sweden.

Introduction The family Syrphidae is a species rich group with mentioned. For some species short notes are gi- about 350 known species in Sweden. There are ven about their abundance or identification. genera with some taxonomical problems, but the majority of species are easy to recognize. The number of species can be estimated as considera- Material bly higher than the 350 known so far (Hedstr6m Since 1996 I have been collecting Syrphidae in 1994). Unfortunately there are only a few biolo- Sweden, and my collection now consists of about gists working on Syrphidae in Sweden. Hed- 2500 Swedish specimens. I have also got data strom (1990, 1991) was the first, for a long peri- from the following collections: W. van Steenis & od, to publish about the Swedish fauna L. Lankreijer, Utrecht (WvS & LL); J.A.W. Lucas, in general. He made a checklist with provincial Rotterdam (JL); Zotilogisch Museum, Amsterdam records based on available literature and about (ZMA), Naturhistoriska Riksmuseet, Stockholm 14.000 specimens, mostly in the collection of the (NHRM), N. Jansson Motala (NJ), and my own Zoological Museum in Uppsala. With these two private collection (JvS). Some of the specimens papers a base was established for a complete were caught by L.O. Wikars (LW) or F. Zuidhoff checklist of the Swedish syrphid-fauna. Bartsch (FZ), now in coll. JvS. If not otherwise stated the (1995a, b) made a checklist based on additional specimens are leg. and coll. J. van Steenis. literature and 12.000 additional specimens, All Cheilosia species were checked by C. mostly from the Naturhistoriska Riksmuseet in Claussen (Flensburg), all Platycheirzs species by Stockholm, his own, and several other private T. Nielsen (Sandness), S. admirandus and all collections. Sphaerophoria species by P. Goeldlin de Tiefe- In this article I will give a list of new and rare nau (Lausanne). The f,rgures were made with the species in Sweden. This list is arranged in alpha- aid of a camera lucida attached to a stereomicro- betical order. For the redlisted species the threat scope. category as given by Ehnstrdm et al. (1993) is

83 Jeroen van Steenis Ent.Tidskr. ll9(1998)

Species list the common and widespread B. testacea. Anasimyia contracta Claussen & Torp: Dr Brachypalpoides lentus (Meigen): Sk, Br

Fig. I. Male abdomen. A. Brachyopa obscura (Fiby urskog). B. Brachyopa testacea (Fiby urskog).

84 Ent. Tidskr. I l9 (1998) Some rare hoverflies in Sweden 18.VI.97 I cr; Sk, Brdsarp, along Verkein I Q both leg. & coll. WvS & LL. A rare species 18.VI.97 I cr; Sk Brdsarp along Verkein resembling the much more common F. cuprea 19.VI.97 I cr all leg. & coll. WvS & LL. First (Scopoli), except for the yellow arista. Probably record from Skine. occuring in very low densities in old mixed deci- C heilosia frontalis Loew : Gii, Skutskiir, Gus- duous woods, some years more numerous. tavsmyrarna RN 6722-1584 8.VL96 I cr. First Hammarschmidtia ferruginea (Fall6n): Up, record from Giistrikland and Svealand, but Brunna, Fiby urskog RN 6641-158623.Y1.97 4 known from all surrounding areas. Earlier refe- oq,2 9 Q leg. WvS, JvS & LL, and29.Yl.97 rences of this species may concern C. nebulosa. I cr leg. JvS & FZt Sk, Hiickeberga, Naturreser- C riorhina be rberina (Fabricius), (threat cat. vat, brook 17.Y1.97 5crcr, I Q leg. & coll. WvS 3): Sk, Dalby Sdderskog 15.VI.97 I cr; 51, & LL. New for Uppland and Skine. A species Hiickeberga brook 17.VI.97 I I both leg. & preferring pine forests with stands of old Popu- coll. WvS & LL. In Denmark this species is lus tremula, but also occurring in deciduous fo- generally uncommon, but in old mixed decidu- rests for example in England. Predominantly bo- ous woods locally rather common (Torp 1994). reoalpine. As the woods onZealand (Dk) and in Skine are groenlandicus (Fabricius): Ly, of the same type, C. berberina is probably also Ammarnds, Laivadalen 620 m RN 7332-1486 rather common in these woods in Skine. I8.VII.97 I cr; and 2|.VII.97 I Q; Hs, Edsbyn Criorhina ranunculi (Panzer), (threat cat. l): Eggisen Malaise trap VI-VII.91 lo leg. LW. A Up, Uppsala, Kungshamn-Morga, on Crataegus rare species with few recent records. Besides sp. RN 6621-1603 16.VI.96 1 cr. The third these three specimens one was reported by known specimen caught this century in Sweden. Bartsch (1997). Bartsch caught the first two in 1992 and 1994 Melanogaster hirtella (Loew): Sk, Dalby 56- north-west of Stockholm (Bartsch 1995b). In derskog 15.VI.97 I 9; Sk, Genarp, Jiimhiittan Holland it is an early spring species and can be naturreservat ll.YI.91 2 q Q all leg. & coll. found in rnixed Fagusl Populus forests in the far WvS & LL. First record from Skine and also the south (Barendregt 1991). Strange that this spe- first for Gdtaland after 1950. cies, which is not known from Denmark, occurs Melanogaster nuda (Macquart) (C. viduata here in Quercus forests. auct. nec. Linnaeus): Sk, Genarp, Jiirnhiittan na- Doros profuges (Harris), (threat cat. 3): Vr, turreservat 17.YI.97 I Q leg. & coll. WvS & LL. Eda kommun, Krila ll-13.VL89 I Q leg. van First record after 1950 in Skine. Rossem coll. ZMA; Up, Uppsala, Nisten RN Neoascia obliqua Coe: Sk Brcisarp along Ver- 6636,8 -1597,8 malaise trap in peat moor 29.VI- kein 19.VI.97 lo leg. & coll. WvS & LL. First 25.YI1.97 I Q . The abundancy of this species record after 1975 in Skine. can fluctuate over several years (Aartset 1994), (Fabricius): Dr, and it has probably become more common Borliinge, Holmsjciama, on Cicuta virosa RN during this decade in Holland. In Denmark 6702-1485 l5.VIII.96 I Q . New for Dalarna. (Torp 1994) and Belgium (Verlinden l99l) it is Platycheirus angustitarsis (Kanervo): Lu, a very rare species and many records are from Nikkaluokta, Seitajaure 765 m RN 7518-1629 before 1900. on Eriophorum sp.28.YI.1996 2oo; To, Kei- Eristalis oestraceus (Linnaeus): Dr, Bor- novuopio, north slope 700 m RN 7646-1703 on liinge, Holmsj6arna, on Cicuta virosa RN 6702- Carex sp. I l.V[.1996 I cr. New for Lule lapp- 1485 l5.V[.96 I 9. New for Dalarna. The mark. A rare species resembling the much more number of observations fluctuate over the years. common M e lano stoma species. In Denmark it increased after 196l but now it Platycheirus hyperboreus (Staeger): To, Abi- seems to be decreasing (Torp l99 ). sko 485 m 6.VIL1980 I Q leg. & coll. JL;To, Ferdinandea ruficornis (Fabricius), (threat Keinovuopio, north slope 700 m RN 7646-1703 cat. 3): Sk, Br6sarp, along Verkein 19.VI.97 I on Carex sp.l l.VII.1996 1 Q ; To, Keinovuopio I ; Sk, Briisarp, Verkeins naturreservat 20.VI.97 750 m RN 7639-170l on Carex sp.l2.Yll.l996

85 Jeroen van Steenis Ent. Tidskr. ll9 (1998) I cr; Ly, Ammarnris, Laivajukke river 620 m RN Verkeins naturreservat 2O.YL91 I Q all leg. & 7331-1486 on Carex sp.22.YI1.19962 Q Q ;Ly, coll. WvS & LL. Recorded for the hrst time af- Ammarniis, Skidbiicken 640 m on Carex sp. RN ter 1950 in Skine. In big stands of Allium ursi- 7331-1487 9.VII.1997 I cr. According to Hed- num this species can be very abundant. They , strirm (1990) all previous records are doubtful. as if drugged by the Allium odor, over and under Bartsch (1995b) mentioned verified specimens the leafs, or feed on the flowers. from Lycksele lappmark. Sphaerophoria bankowskae Goeldlin: Ly, Platycheirus lundbecki (Collin): To, Kei- Ammarniis, Ijulfln 420 m RN 7317-1515 novuopio, north slope 700 m RN 7646-1703 on l9.VII.96 I cr. New for Lycksele lappmark. Salix sp. I l.VII.1996 I Q . In Sweden previously Sphaerophoria boreoalpina Goeldlin: To, only known from the type series of P. fiellbergi Nikkaluokta river 450 m RN 7531-1636, on Ra- Nielsen, 1974, a synonym of P. lundbecki, bus chamaemorus 26.Y1.96 I Q ; Ly, Ammamtis, caught nearAbisko in 1972 and 1973. Laiverte south slope 800 m RN 7332-1483, on Platycheirus nigrofemoratus Kanervo: Lu, Polygonum viviparum 23.Y11.96 I cr; Ly, Am- Nikkaluokta bridge 450 m RN 7532-1636 marnds, Laivadalen 620 m RN 7332-1486, on 26.V1.1996 I cr; Lu, Nikkaluokta, Seitajaure Rubus chamaemorus 9.VII.97 2 o: and 810 m RI'J 7519-1630 on Ranunculus nivalis 17.Yll.97 I Cr. New for Lycksele lappmark. 30.VI.1996 I cr; Lu, Nikkaluokta bridge 750 m Sphaerophoria chongjini Bankowska: Ly, RN 7522- 1637 on Caltha palustris 2.VI1.1996 I Ammarniis, ljulin iver 420 m RN 7317,3- Cr; To, Keinovuopio, north slope 700 m RN 1515,5 malaise trap 2l-31.VII.96 I I ; Dr, Bor- 7646-1703 on Ranunculus nivalis l3.VII.l996 1 liinge, Frostbrunnsdalen RN 6703-1481 cr. New for Lule lappmark. Described as a va- I3.VIII.96 I cr leg. WvS & JvS. New for Lyck- riety of P albimanus (Fabricius), and in Sweden sele lappmark and Dalarna. previously only known from Abisko (Vockeroth Spilomyia diophthalma (Linnaeus), (threat 1990). cat. 3): Up, Uppsala, Nedre Fdret RN 6633- Platycheirus parmatus Rondani: Ly, Ammar- 1604, on Heracleum sphondylium 6.VIII.96 I I nds, Laivajukke 620 m bridge over RN 7331- leg. WvS & JvS; Up, Uppsala, Higadalen RN 1486 6.YII.97 I Q . New for Lycksele lappmark. 6634-1600, on Pastinaca sativa 8.YIII.96 2q A species with a disjunct distribution. It is l9g. WvS & JvS; and 27.Y11.97 20, I I ; Up, known from boreal parts of Scandinavia and Osterbybruk, Florarna RN 6688-1613 from alpine regions in France, Germany, Swit- I0.VIII.96 I cr leg. WvS & JvS; Dr, Borliinge, zerland etc. but also from Belgium and Holland. Bitstadbadet RN 6710-1476 I4.VIIL96 I Q leg. Pocota personata (Harris), (threat cat. 3): WvS & JvS; Dr, Borliinge, Holmsjriarna, on Ci- Up, Uppsala, Kungshamn-Morga, on Crataegus cuta virosaRN 6702-1485 I5.VIII.96 I cr, I I sp. RN 6627-1603 16.VI.96 I cr; Up, Brunna, leg. WvS & JvS; and RN 6702-1486 30.VIL97 I Fiby urskog, on Prunus padas RN 6641-1586 cr; Dr, Siljansniis, Bjdrkberget 28.VII.86 I cr 27.Y.97 t cr; Og, Motala, Kanalen yellow trap leg. J.A. Bolding coll. ZMA; Na, Laxi, in: Fagus I5.VII.96 I Q leg. & coll. NJ. P. per- 21.Vn.80 I Cr; and 23.VII.80 I Cr both leg. & sonata is breeding in rot-holes, high and low, in coll. JL; 0g, Nonkciping, Norrkrog yellow trap, old deciduous trees (Rotheray 1993). The males in Quercus 7.VIII.96 I Q leg. & coll. NJ. From can be caught feeding on diverse Crataegus and Stockholms liin there are more recent records Prunus species, or when they are hovering (H. Bartsch pers. comm.). S. diophthalmaispro- around old deciduous trees. The females, which bably not as rare in Svealand as supposed by are caught more seldom, probably fly up in the Ehnstrrim et al. (1993). trees looking for suitable breeding places. This Syrphus admirandus Goeldlin: Up, Hallsta- species is a perfect bumblebee mimic which is vik, Hdverd-Bergby RN 6668-1663 8.Y1.97 2 easily overlooked in the field. I 9; Up, Brunna, Fiby urskog RN 6641-1586 Portevinia maculata (Fall6n): Sk, Brcisarp, 23.V1.97 2 I Q. Described by Goeldlin (1996), along Verkein 18.VI.97 3 crcr; Sk, Br6sarp, and more data presented by Bartsch (1997).

86 Ent. Tidskr. 119 (1998) Some rare hoverflies in Sweden Similar to the much more common S. ribesii Temnostoma meridionale Krivosheina & Ma- (Linnaeus), but easily recognized by having yel- maev: Sk, Brcisarp, along Verkein 19.VI.97 I Cr; low lunulae instead ofblack or partly black as in Sk, Brdsarp, Verkeins naturreservat 20.YI.97 I S.ribesii (Fig 2). Look for smaller specimens, Cr leg. & coll. WvS & LL. This species has been which have small yellow bands on the abdomen. reported from Sweden only recently (Doczkal They might be females of S. admirandus. r996). Syrphus attenuatus Hine: To, Saarikoski, Vei- Trichopsomyia Jlavitarsis (Meigen): Up, vijarvi 450 m, on Cctrex sp. RN 7645-1716 Uppsala, Uppsala-niis, on Caltha palustris RN l5.VII.96 I 9;Ly, Ammarnris, Laivajukke 620 6630-1600 ll.VI.96 l cr; Up, Uppsala, Nisten m RN 7331-1486 5.VIII.96 I ? leg. FZ; Ly, RN 6636,8-1597,8 malaise trap in peat moor Ammarnds, Potatisbacken 440 m RN 7318,0- 29.YI-25.YI.97 I 9. Recently reported from 1518,6 malaise trap I-22.Y1.97 I Q; Ly, Am- Uppland for the first time (Bartsch 1997). marnas, !ul6n 420 m RN 1317-151823.YI1.97 Volucella inflata (Fabicius): Bohusldn 1862 I Q . Rather rare species, sometimes diff,rcult to I Q ex coll. Paris leg. Malm coll. JL. New for discover among the much more common S. Sweden. torvus Osten Sacken. Only recently V. inflata has been reported Temnostoma bombylans (Fabricius), (threat from north west Germany (Stuke 1996). Even if cat. 2)i Sk, Dalby Stiderskog 15.VI.97 I cr; Sk, this species was more common in the past, as in Brosarp, 18.VI.97 I Q ; Sk, Brrisarp, Verkeins Holland (Goot 1973, Lucas 19'14, Aartsen naturreservat 2O.YI.97 I Q all leg. & coll. WvS 1994), this is a strange record, because it is not & LL; Up, Uppsala, Nisten Rcidmossen RN known from the surrounding countries. In this it 6635-1597 24.YL97 I cr leg. WvS, JvS & LL; resembles Merodon clavipes (Fabricius), a Med- Up, Uppsala, Nisten RN 6636,8-1597,8 malaise iterranean species, also known from Sweden: trap in peat moor 29.YI-25.Y[.97 3 Q 9; Sti, Bohusldn 1862leg. Malm coll. Mus6um Natio- Botkyrka K:n, Grddinge Kyrksjcin window trap nal d'Histoire Naturell, Paris (Hurkmans 1993). 3-7.VII.95 2a andT-l2.YIL95 1cr, I Q leg. There is a possibility that these specimens have T.Nilsson coll. NHRS. In Denmark (Torp 1994) been labelled incorrectly and that they originate and Holland (Delfos 1995) increasing and ex- from southern Europe. tending its range. Probably also extending to Xylota abiens Meigen: Up, Uppsala, Higada- southern Sweden as the first records for Skine len RN 6634-1600 l9-Vl-1997 1cr. First record were reported by Scirensson (1994). In Stock- from Uppland and only known from Skine from holms ldn the species is not so uncommon the period before 1950. A very rare species. (Bartsch pers.comm.) in recent years. Xylota triangularis Zetterstedt: Hs, Edsbyn,

Fig. 2. Female head. A. syrphus admirandus (Fiby urskog). B. syrphus ibesii (Ammamiis).

87 Jeroen van Steenis Ent. Tidskr. 1 19 (1998) Eggisen malaise trapVI-V[.I991 1 Q leg. LW. Hedstrdm, L. 1990. Svenska insektfynd - rapport 6. - After 22 years (Andersson 1988) caught again Ent. Tidskr. lll: 133-147. near Edsbyn. - I 99 I . Svenska insektfynd - rapport 7. - Ent. Tidskr. l12:133-146. - I 994. Hur minga arter av myggor och flugor har vi i Sverige? Ent. Tidskr. 115 (l-2): ll-22. Acknowledgments - Hurkmans, W A. 1993. Monograph of Merodon I wish to thank C. Claussen, T. Nielsen, and P. Goeld- (Diptera: Syrphidae). Part l. - Tijdschr. entom. lin de Tiefenau for checking some of my material, W. 136:14'7-234. van Steenis, J.A.W Lucas, B. Brugge (ZMA), B. Vik- Lucas, J.A.W 1974. Syrphiden in de jaren 1969- lund (NHRM), and N. Jansson for the possibility of 1972. - Ent.Ber. Adam 34: 48-55. using their data, L. Hedstrrim and H. Bartsch for valu- Nielsen, T.R. 1974. Notes on two northem species of able comments, the Entomological Societies in Upp- the genus Platycheirus St.-Farg. et Serv. (Dipt., land and Stockholm for financial support, the Depaft- Syrphidae). - Norsk ent. Tidsskr. 2l: 167-112. ment of Zoology, Uppsala University for the working Rotheray, G.E. 1993. Colour guide to Hoverfly larvae (Diptera, Dipt.Digest facilities and Uppsala, Norbotten and Vzisterbotten Syrphidae). - 9:1-156. Stuke, J-H. 1996. Bemerkenswerte Schwebfliegen- Idns ldnsstyrelser for the permission of catching ho- beobachtungen (Diptera: Syryhidae) aus Nie- verflies in some of their nature reseryes. dersachsen und Bremen 1. - Beitrlge zur Natur- kunde Niedersachsens 49: 46-52. Scirensson, M. 1994.Inventering av insekts- och spin- References deldjursfaunan i nigra naturskogsomrflden i Or- Aartsen. B. van. 1994. Nieuwe en zeldzame zweef- kelljunga kommun i norra Skine. 36 pp, Lund. vliegen voor de Nederlandse fauna (Diptera: Thompson, F.C. & Torp Pedersen, E. 1982. Two new Syrphidae). - Nederlandse Faunistische Mede- palaearctic Syrphidae (Diptera). -Ent. Scand. 13: delingen 5:5-8. 441-444. Andersson, H. 1988. De svenska Xylotini-artema Torp, E. 1994. Danmarks svirrefluer (Diptera: Syr- (Diptera, Syrphidae). - Ent. Tidskr. 109: 129-137 . phidae). Danmarks Dyreliv 6. (Stenstrup). Barendregt, A. 1991. Zweefvliegen tabel. Achtste Verlinden, L. 1991. Fauna van Belgie, Zweefvliegen druk. Jeugdbondsuitgeverij, Utrecht. 92pp. (Syrphidae). Kon.Belg.Inst.Nat.wet. Brussel: 298 Bartsch, H. 1995 a. Blomflugor i Dalama - en fcirteck- pp. ning 6ver kiinda och okzinda arter i Dalarna. - In- Vockeroth, J.R. 1990. Revision of the Nearctic spe- ocellia (1): 9-13. cies of Platycheirus (Diptera, Syrphidae). - Can. 1995 b. Checklist for Swedish Hoverflies 22pp. lar- Ent. 122: 659-766. f?il1a. 1997. Efterlysta, ovanliga, fcirbisedda och nigra an- dra intressanta norrldndska blomfl ugor (Diptera, Sammanfattning Syrphidae). - Natur i Non 16 (2):69-94. Fynd av blomflugor i Sverige gjorda av fcirfatta- Delfos, M.J. 1995. De zweefvliegen fauna vanZuid- ren sjalv 1996 och 1997, samt nigra andra fynd Holland (Diptera: Syrphidae). Nationaal Natuur- frin andra samlingar presenteras. Blomflugor- historisch Museum), Leiden. 68pp. Doczkal, D. 1996. Schwebfliegen aus Deutschland: nas utbredning i Sverige 2ir fortfarande ofull- Erstnachweise und wenig bekannte Arten (Dipte- stiindigt kiind. Ett antal srillsynta och hotade ar- ra, Syrphidae). - Volucella 2 (ll2):36-62. ter behandlas med avseende pi frirekomst i Ehnstrrim, B., Gdrdenfors, U. & Lindelctw A. tgg:. Sverige och utlandet. Krinnetecken f

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