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Key: Northwestern European Hippoboscidae
Based on Hutson (1984).
References
Hutson, A.M., 1984. Keds, flat-flies and bat-flies. Diptera, Hippoboscidae and Nycteribiidae. - Handbooks for the Identification of British Insects 10(7): 1-40.
Petersen, F.T., J. Damgaard & R. Meier, 2007. DNA taxonomy: How many DNA sequences are needed for solving a taxonomic problem? The case of two parapatric species of louse flies (Diptera: Hippoboscidae: Ornithomya Latreille, 1802). - Arthropod Systematics and Phylogeny 65(2): 119-125. (PDF)
Last modified 20/01/2010 23:24 by Paul BeukNo of couplets: 15

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Key
1a
Wings fully developed and functional .
2
b
Wings reduced or absent (either by reduction or by loss) .
13
 
2a
Tarsal claws simple, but with a pale basal lobe ; humeral callus weak, not produced horn-like along side of head .
3
b
Tarsal claws bifid and with a pale basal tooth ; humeral callus strong and horn-like along side of head ; on birds.
5
 
3a
Wing with one or two cross-veins ; R4+5 well separated from C until apex; on mammals.
4
b
Wings with three cross-veins enclosing cells posterior to the radial veins (compare with ); apical half of R4+5 running very close to C; on birds.
Ornithoica turdi (Olivier in Latreille, 1812)
 
 
4a
Wing clear and hyaline, with only one cross-vein; head much broader than long ; thorax markedly flattened; on deer.
Lipoptena cervi (Linnaeus, 1758)
 
b
Wing distinctly crenulated and tinted, with two cross-veins; head not much broader than long ; thorax not so markedly flattened; on horses.
Hippobosca equina Linnaeus, 1758
 
 
5a
Wing with three cross-veins posterior to radial veins ; vein Cu+1A well developed, like 2A; scutellum with four or more strong setae.
6
b
Wing with one or two cross-veins posterior to the radius; vein Cu+1A poorly developed, hardly visible at base ; scutellum at most with two strong setae.
11
 
6a
Vein R2+3 with apical 3/5 fused with C; wing membrane entirely bare.
Ornithophila metallica (Schiner, 1864)
 
b
Vein R2+3 well separated from C except at apex; wing membrane usually with microtrichia .
7
 
7a
Antennae small and narrow, much longer than broad ; axillary cord fringed with soft pale hairs .
8
b
Antennae large and very broad, at most twice as long as broad; axillary cord fringed with strong black setae .
Ornithoctona laticornis (Macquart)
 
 
8a
Wings with macrotrichia more or less uniformly in apical half, cell r3 and 1m without distinct bare stripes ; eye smaller (postorbit not shorter than greatest width of inner orbit, eye not longer than greatest interocular distance); ocelli small; scutellar setae not confined to a single transverse row near posterior margin .
Ornithomya biloba Dufour, 1827
 
b
Wing macrotrichia restricted in apical half of wing, bare stripes preent in cell 1m and usually 3r ; eye larger (postorbit shorter than greatest width of inner orbit; eyes longer than greatest interocular distance); ocelli large and conspicuous ; scutellum with a distinct row of 4-8(-10) setae near posterior margin only .
9
 
9a
Larger species, wing length 5.5-7.0 mm; scutellum with a row of 8(-10) setae; head and thorax pale; wing setulae reduced to leave a large area in cell 3r clear .
Ornithomya avicularia (Linnaeus, 1758)
 
b
Smaller species, wing length less than 5.5 mm; scutellum with row of 4-6 setae .
10
 
10a
Ventral part of head with genae virtually always entirely pale.
[Previously a number of other characters were used, but only the above character was shown to be reliable by Petersen et al. (2007):
Wing length 3.5-4.5 mm; scutellum with row of 4 setae ; head and thorax pale; cell 3r less setulose with large clear area .]
Ornithomya fringillina Curtis, 1836
 
b
Ventral part of head with genae virtually always distinct genal marking . [Wing length 4.5-5.5 mm; scutellum with row of 6 setae ; head dark dorsally, darkening extending ventrally almost to jugular setae; mesonotum dark, darkening extending laterally to mesobasisternum; cell 3r more setulose with only basal area clear and often a small clear area posterior of apex of R4+5 .]
Ornithomya chloropus Bergroth, 1901
 
 
11a
Wing with only one cross-vein. Macrotrichia not extending to 2A, cell 2m+1A partly and cell 2a completely bare. Palpi distinctly more than twice as long as broad; median length of scutellum about ? the distance between bases of scutellar setae; posterior margin of scutellum more or less straight; male mid metatarsus with ventral peg-like setae near base.
Pseudolynchia canariensis (Bequaert)
 
b
Wing with two cross-veins .
12
 
12a
Scutellum with two strong setae .
Icosta ardea (Macquart, 1835)
 
b
Scutellum only with soft hairs . 1st basal cell long and narrow with macrotrichia only on vein R4+5; 2nd reaching at least to apex of Sc; wing microtrichia absent on both surfaces of half of cell 2m+1a and whole of cell 2a; posterior margin of head more or less straight (upper orbits and postvertex not strongly produced or separated by distinct notches); on osprey.
Olfersia fumipennis (Sahlberg)
 
 
13a
Wings reduced but entire and with well developed venation ; tarsal claws bifid and with a pale basal lobe ; humeral callus well developed ; head not broader than long; on birds.
14
b
Wings either reduced to a veinless knob or broken off, leaving a broad flat veined stump ; tarsal claws simple with a pale basal lobe ; humeral callus weak ; head much broader than long; on mammals.
15
 
14a
Wing long (5-6 mm) and narrow, at least six times as long as wide and twice as long as head and thorax; female with strong spiniform setae in posterolateral area ; male without spiniform setae.
Stenepteryx hirudinis (Linnaeus, 1758)
 
b
Wing short (4.0-4.5 mm) and broad, at most three times as long as wide and about 1.5 times as long as head and thorax; tip of wing attenuated, C reaching to about 0.75 length of anterior wing margin; female abdomen only with short fine setae in posterolateral area .
Crataerina pallida (Olivier in Latreille, 1812)
 
 
15a
Wings reduced to a veinless solid knob; halter absent .
Melophagus ovinus (Linnaeus, 1758)
 
b
Wings broken off, leaving a broad flat veined stump; halter present .
Lipoptena cervi (Linnaeus, 1758)
 
 
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