Moths of North Carolina
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42 NC Records

Apantesis arge (Drury, 1773) - Arge Moth

Taxonomy
Superfamily: Noctuoidea Family: ErebidaeSubfamily: ArctiinaeTribe: ArctiiniP3 Number: 930240.00 MONA Number: 8199.00 MONA Synonym: Grammia arge
Comments: The genus Apantesis is represented by 43 species in North America, including 13 species in North Carolina. Included along with A. doris in subgenus Mimarctia, characterized by their completely pale costal cells as well as other features (Schmidt, 2009).
Species Status: Molecular analysis of five populations of A. arge formed a discrete cluster with low divergence. A 4.9% minimum interspecific difference separates A. arge from A. doris, the species of Apantesis with the greatest similarity (see Fig. 133 in Schmidt, 2009). While these results indicate that A. arge is fairly homogeneous, we have noted variations both in the male valves and in the hindwing color and spot size that need further exploration.
Identification
Field Guide Descriptions: Covell (1984); Beadle and Leckie (2012)Online Photographs: MPG, BugGuide, iNaturalist, Google, BAMONA, GBIF, BOLDTechnical Description, Adults: Forbes (1960); Schmidt (2009)Technical Description, Immature Stages: Forbes (1960); Wagner (2005)                                                                                 
Adult Markings: A pale, pinkish-cream colored Tiger Moth, with the black markings on the forewings reduced to narrow streaks and wedges. The cream-colored costal cell distinguishes arge from all other Apantesis except for A. doris. Apantesis arge and A. doris are very similar but Schmidt (2009) gives the following features of the forewing as diagnostic of A. arge: a broader pale band overlying vein C1 and the postmedian bent at an acute angle, meeting the costa obliquely rather than at a right angle or more obtusely as in A. doris. Schmidt further noted that the pale line along vein A1+2 is partially or entirely fused with the broad cream band running along the inner margin, whereas in A. doris it runs completely within the long black streak that runs just inward from the marginal pale band (see Schmidt's (=Neoarctia's) comments in iNATURALIST at https://www.inaturalist.org/observations/15377769#activity_identification_44104834).

The hindwings are usually pinkish white in A. arge but more completely pink, orange, or salmon in A. doris (Forbes, 1960). However, some of our specimens of A. arge also have salmon colored hindwings. A more reliable difference is that the black spots on the hindwing are usually smaller in A. arge than in A. doris and if larger, then those in the subterminal area are typically split by lines of the pink ground color, particularly along veins C2 and A1+2; in A doris the spots are both large and undivided (Schmidt, 2009).
Forewing Length: 18.3 mm, males; 23.8 mm, females (Schmidt, 2009)
Adult Structural Features: Schmidt (2009) describes and illustrates several differences distinguishing male A. arge from A. doris. In A. arge, the distal portion of the valve is gradually tapered and has rounded apex; the caudoventral margin is slightly concave. In A. doris, the distal portion of valve is narrow, elongate, and crescentic. In specimens we have examined (see Structural Features) the valves appear to be more curved than shown in Schmidt's illustration for A. arge, but not as narrow as in A. doris.
Structural photos
Adult ID Requirements: Identifiable from photos showing hindwings, abdomen, or other specialized views [e.g., frons, palps, antennae, undersides].
Immatures and Development: Larvae are grayish purple to charcoal with prominent mid-dorsal and sub-dorsal white stripes (Forbes, 1960; Wagner, 2005). Setae are generally softer than in other Apantesis. Larvae of A. doris are similar but the pale stripes are narrower and the sub-dorsal lines broken into separate spots.
Larvae ID Requirements: Identifiable from good quality photos, especially where associated with known host plants.
Distribution in North Carolina
Distribution: Occurs over most of the state but records are missing from the Outer Banks and other barrier islands and from the High 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