Syngrapha interrogationis

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Syngrapha interrogationis
Syngrapha interrogationis.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Superfamily: Noctuoidea
Family: Noctuidae
Genus: Syngrapha
Species:
S. interrogationis
Binomial name
Syngrapha interrogationis
Synonyms
  • Plusia interrogationis
  • Phalaena interrogationis
  • Noctua aemula
  • Phalaena conscripta
  • Noctua subpurpurina
  • Phalaena aurosignata
  • Plusia borealis
  • Plusia epsilon
  • Autographa zeta
  • Syngrapha pyrenaica
  • Syngrapha flammifera

Syngrapha interrogationis, the scarce silver Y, is a moth of the family Noctuidae. It is found in northern part of the world including Alaska, Canada, Iceland, Europe, Siberia, the Pacific Northwest region of the United States, and Northeast Asia.

Contents

Subspecies

There are three recognised subspecies:

Forma

See aberratio

Technical description and variation

Illustration Syngrapha pyrenaica.jpg
Illustration

The wingspan of S.interrogationis is 32–38 mm (1.25–1.5 in). The forewing is bright purplish-grey, suffused with black in the median area and towards the apex. The edges of the stigmata and the lines are lustrous grey, the inner and outer lines black and double. The inner line is sinuous in the costal half and otherwise forms three small curves, the outer line regularly crenulate throughout. The subterminal line is preceded by a conspicuous black toothed and indented line, with a blackish cloud towards the apex and a row of pale grey lunules before the terminal marks. The subcellular silvery mark is highly variable: in form orbata [Warren] it forms a simple loop with fine silvery edge; in the nominate form, this is followed by a small silvery dot; in form flammifera Huene, it is followed by a large round spot conjoined to it, or rarely separate; in form ignifera [Warren], a development of this last, it is pale yellow, as in some examples of flammifera, and shaped like a tadpole, but there is deep fiery red scaling before the postmedian line, beyond the antemedian, and along the submedian fold. The hindwing is brownish yellow, clouded with darker scales, and with a broad blackish border. The type specimen, a male from Livonia, is in the Tring Museum in England.

The subspecies transbaikalensis Stgr., from Dauria and East Siberia, is more uniform bluish grey, with very little black suffusion on the forewing and a paler hindwing; this form is also recorded from Estonia by Petersen. Form rosea Tutt, from Scotland, has a rosy ground colour in place of bluish grey. Form cinerea [Warren] has the ground color dull ashy grey with scarcely any dark markings, except the subterminal line, and no purplish suffusion; the silvery mark forms a somewhat triangular loop. Of this form the Tring Museum possesses three examples from Cedre, Hautes-Pyrénées. In the same museum is still another grey form, much resembling cinerea but with a complete silvery gamma mark and somewhat more developed dark shades; this specimen is from Cauterets in the Pyrenees and represents form gammifera [Warren]. These last two grey forms may constitute a species distinct from S. interrogationis. [1] [2]

Fig.9 larvae after last moult Buckler W The larvae of the British butterflies and moths PlateCII.jpg
Fig.9 larvae after last moult

Biology

The scarce silver Y moth flies from June to August depending on the location.

The larvae are pale green; the dorsal line is dark, with pale edges, and there are several pale wavy sub-dorsal lines and a broad whitish lateral line with dark upper edge. The larvae feed on the leaves of various plants, including Vaccinium myrtillus , Vaccinium uliginosum , Betula , Calluna vulgaris , Andromeda polifolia and Urtica . [3]

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<i>Lithophane furcifera</i> Species of moth

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References

  1. ↑ Seitz, A. Ed., 1914 Die Großschmetterlinge der Erde, Verlag Alfred Kernen, Stuttgart Band 3: Abt. 1, Die Großschmetterlinge des palaearktischen Faunengebietes, Die palaearktischen eulenartigen Nachtfalter, 1914
  2. ↑ Walter Forster, Theodor A. Wohlfahrt: Die Schmetterlinge Mitteleuropas. Band 4: Eulen. (Noctuidae). Franckh’sche Verlagshandlung, Stuttgart 1971, ISBN 3-440-03752-5.
  3. ↑ "Robinson, G. S., P. R. Ackery, I. J. Kitching, G. W. Beccaloni & L. M. Hernández, 2010. HOSTS - A Database of the World's Lepidopteran Hostplants. Natural History Museum, London".
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