Moths of North Carolina
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Common Name:
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View PDFLimacodidae Members: 46 NC Records

Isochaetes beutenmuelleri (Hy. Edwards, 1887) - Spun Glass Slug Moth


Taxonomy
Superfamily: Zygaenoidea Family: LimacodidaeP3 Number: 660033.00 MONA Number: 4675.00
Comments: The sole member of the genus in North America
Identification
Field Guide Descriptions: Covell (1984); Beadle and Leckie (2012)Online Photographs: MPG, BugGuide, BAMONATechnical Description, Adults: Forbes (1923)Technical Description, Immature Stages: Wagner (2005)                                                                                 
Adult Markings: One of the smaller Limacodids with the length from tip of head to apex of forewing at rest averaging 8 mm (n = 8). The short, broad forewing is a patchwork of orange, dark brown, cream, and black. There is a darker-edged pale oval centered in the subterminal area, though this mark becomes more difficult to see on dark and worn individuals. Females are darker than males (Covell, 2005).
Wingspan: 20 mm (Forbes, 1923)
Adult Structural Features: Male antennae are pectinate and the palps reach the vertex or exceed it; hind tibiae with only a single pair of spurs (Forbes, 1923). The 'bottle brush" middle pair of fore-legs are particularly noticeable, often held straight out from the body.
Adult ID Requirements: Identifiable from good quality photos of unworn specimens.
Immatures and Development: The common name for this moth is derived from the delicate-looking caterpillar, which is pale translucent green with hairy lobes radiating from the perimeter of the body and bearing a darker green mid-dorsal "stripe," edged in white (Wagner, 2005).
Larvae ID Requirements: Identifiable from good quality photos, especially where associated with known host plants.
Distribution in North Carolina
Distribution: Occurs in all three regions of the state, but we lack records from both the southern half of the Coastal Plain and most of the Mountains
County Map: Clicking on a county returns the records for the species in that county.
Flight Dates:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

Click on graph to enlarge
Immature Dates:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

Click on graph to enlarge
Flight Comments: Appears to have a fairly narrow flight period, from June to early August
Habitats and Life History
Habitats: Most of our records come from wet to mesic stands of hardwoods, including bottomland and riparian forests, lakeshores, and mesic hardwoods.
Larval Host Plants: Beech and oak (Wagner, 2005).
Observation Methods: Appears to come fairly well to lights, but may be better sampled using sheets rather than traps. Like other Limacodids, it does not appear to come to bait or visit flowers.
Wikipedia
See also Habitat Account for General Hardwood Forests
Status in North Carolina
Natural Heritage Program Status:
Natural Heritage Program Ranks: G4 [S4]
State Protection: Has no legal protection, although permits are required to collect it in state parks and on other public lands.
Comments: Occurs across a wide area of the state, although records are also absent from many areas. Appears to be associated with fairly common habitats and host plants and thus seems secure within the state.

 Photo Gallery for Isochaetes beutenmuelleri - Spun Glass Slug Moth

35 photos are available. Only the most recent 30 are shown.

Recorded by: Dean Furbish on 2021-07-22
Wake Co.
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Recorded by: Jim Petranka and Becky Elkin on 2021-07-21
Graham Co.
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Recorded by: Simpson Eason on 2021-07-20
Durham Co.
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Recorded by: Jim Petranka and Becky Elkin on 2021-07-08
Swain Co.
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Recorded by: Simpson Eason on 2021-07-05
Durham Co.
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Recorded by: Simpson Eason on 2021-06-30
Durham Co.
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Recorded by: Gary Maness on 2020-08-09
Guilford Co.
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Recorded by: Brian Bockhahn on 2020-07-29
Orange Co.
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Recorded by: Mark Shields on 2020-07-24
Onslow Co.
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Recorded by: Vin Stanton on 2020-07-18
Buncombe Co.
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Recorded by: Vin Stanton on 2020-07-18
Buncombe Co.
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Recorded by: Mark Shields on 2020-07-16
Onslow Co.
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Recorded by: Jim Petranka and Becky Elkin on 2020-07-12
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2020-07-12
Madison Co.
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Recorded by: Steve Hall on 2020-06-26
Orange Co.
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Recorded by: L. M. Carlson on 2019-07-29
Orange Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-05-30
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-05-30
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2018-07-03
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2018-07-03
Madison Co.
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Recorded by: K. Bischof on 2017-07-01
McDowell Co.
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Recorded by: Julie Tuttle on 2017-06-24
Orange Co.
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Recorded by: Darryl Willis on 2017-06-20
Cabarrus Co.
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Recorded by: B. Bockhahn, P. Scharf, S. Hall on 2015-07-22
Stanly Co.
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Recorded by: Stephen Hall on 2015-07-10
Orange Co.
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Recorded by: Paul Scharf on 2014-07-20
Warren Co.
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Recorded by: K. Bischof on 2014-07-01
McDowell Co.
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Recorded by: K. Bischof on 2013-07-05
Transylvania Co.
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Recorded by: Parker Backstrom on 2013-06-29
Chatham Co.
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Recorded by: Parker Backstrom on 2013-06-29
Chatham Co.
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