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Key: The British species of the genus Suillia
After Withers (1987).
References
Withers, P., 1987. The British species of the genus Suillia (Diptera, Heleomyzidae), including a species new to science. - Proceedings and Transactions of the British Entomological and Natural History Society 20: 91-104.
Last modified 09/01/2024 18:18 by Paul BeukNo of couplets: 17

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Key
1a
Postpronotal seta present.
Suillia atricornis (Meigen, 1830)
 
b
Postpronotal seta absent.
2
 
2a
Scutellum with prominent apical tubular projection.
Suillia oxyphora (Mik, 1900)
 
b
Scutellum without prominent projection.
3
 
3a
Scutellum entirely bare, devoid of fine dark hairs (care must be taken with bicolor where short, pale hairs are present).
4
b
Scutellum at least with marginal hairs.
6
 
4a
Wing veins heavily shaded. Antennae dark. Junction of facial and frontal orbit with dark spot. Double vibrissae.
Suillia ustulata (Meigen, 1830)
 
b
Wing veins clear. Antennae pale. Orbital spot absent. Single vibrisse.
5
 
5a
Scutellum with small median tubercle [PB: which may be hardly perceptible?]. Scutum matt. Male fore metatarsus without ventral hook.
Suillia fuscicornis (Zetterstedt, 1847)
 
b
Scutellum without small median tubercle. Scutum subshining. Male fore metatarsus with ventral hook.
Suillia miki (Pokorny, 1886) would run to this couplet and can be distinguished from dumicola on characters of the genitalia.
Suillia dumicola (Collin, 1943)
 
 
6a
Anepisternum and anepimeron setose.
7
b
Anepisternum and anepimeron bare.
9
 
7a
Subscutellar hairs present.
Suillia humilis (Meigen, 1830) (=inornata (Loew, 1862))
 
b
Subscutellar hairs absent.
8
 
8a
Arista long plumose. Cross veins and radial vein shaded with a subapical suffusion across distal area of longitudinal veins.
Suillia variegata (Loew, 1862)
 
b
Arista short plumose. Only cross veins shaded.
Suillia notata (Meigen, 1830)
 
 
9a
Subscutellar hairs absent.
10
b
Subscutellar hairs present.
13
 
10a
Arista long plumose.
11
b
Arista short plumose or pubescent.
12
 
11a
Scutellum with hairs near the margins only. Proepisternal hairs absent.
Suillia flava (Meigen, 1830)
 
b
Scutellum almost completely haired dorsally. Proepisternal hairs present above base of fore coxae.
Suillia affinis (Meigen, 1830)
 
 
12a
Cross veins clear. Male fore metatarsus with ventral hook.
Suillia bicolor (Zetterstedt, 1838)
 
b
Cross veins shaded. Male fore metatarsus without ventral hook.
Suillia flavifrons (Zetterstedt, 1838)
 
 
13a
Scutellum hairy all over. Fore tarsal segment 5 enlarged, longer than segments 3 and 4 combined.
Suillia vaginata (Loew, 1862)
 
b
Scutellum with bare areas. Fore tarsal segment 5 narrower and shorter than segments 3 and 4 combined.
14
 
14a
Cross veins faintly shaded. Arista long plumose.
Suillia pallida (Fallén, 1820)
 
b
Cross veins and tips of radial veins heavily shaded. Arista short plumose or pubescent.
15
 
15a
Narrow median area on scutellum bare. Arista short plumose.
According to Czerny (1924) this species can be separated from similis (Meigen, 1830) by the clearly delimited spots at the ends of the longitudinal veins.
Suillia imberbis Czerny, 1924
 
b
Broad median area on scutellum bare.
16
 
16a
Arista short plumose.
Suillia laevifrons (Loew, 1862)
 
b
Arista pubescent.
17
 
17a
Pruinosity of ocellar triangle extends beyond that of the orbital setae. Orbital setae well forward of anterior ocellus.
Suillia parva (Loew, 1862)
 
b
Pruinosity of ocellar triangle does not extend as far as that of the orbital setae. Orbital setae well forward of anterior ocellus.
Suillia dawnae Withers, 1987
 
 
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