How Many Instars Do Painted Lady Larvea Go Throifh

common proper name: American lady, American painted lady
scientific name: Vanessa virginiensis (Drury) (Insecta: Lepidoptera: Nymphalidae: Nymphalinae)

Introduction - Distribution - Clarification - Life Cycle and Biology - Hosts - Selected References

Introduction (Back to Top)

Vanessa virginiensis (Drury) has been known by a number of common names (Cech and Tudor 2005, Miller 1992) including American lady, American painted lady, painted dazzler, and Hunter'south butterfly. Information technology will be referred to here every bit the American lady in accord with the Checklist of North American Butterflies Occurring North of Mexico (NABA 2004). Although the adult American lady is an attractive butterfly, it is probably best known amongst naturalists for the characteristic nests made by its caterpillars.

Figure 1. Adult American lady, Vanessa virginiensis (Drury), with dorsal view of wings. Photograph by Don Hall, University of Florida.

Distribution (Back to Pinnacle)

The American lady occurs from southern Canada throughout the U.Due south. and s to northern Due south America and is seen occasionally in Europe, Hawaii, and the larger Caribbean islands (Scott 1986, Opler and Krizek 1984, Cech and Tudor 2005).

Description (Back to Pinnacle)

Adults: The fly spread of adults is 1.75 to 2.40 inches (Daniels 2003). The upper surface of the wings is orange-brown with blackness margins. The front wings have white spots on the outer third. The lower side of the front wings has a bright pink area. Part of the forewing margin is concave — one of the characteristics that distinguishes information technology from the like and closely related painted lady, Vanessa cardui (Linnaeus). The lower side of the hind wing has a characteristic "cob-spider web" pattern and ii big heart spots about the margin. Past dissimilarity, the painted lady has a row of four smaller middle spots.

There are 2 seasonal forms of the adults. The early season form is larger and more than brightly colored while the late season grade is smaller and is paler in color with reduced black markings (Opler and Krizek 1984).

Figure 2. Adult American lady, Vanessa virginiensis (Drury), with ventral view of wings. Photograph by Don Hall, University of Florida.

Eggs: The eggs are yellow-green (Opler and Krizek 1984).

Larvae: Full grown larvae are approximately 1.iv inches in length (Minno et al. 2005). The trunk color is variable. Some larvae are primarily xanthous with thin black transverse lines on the anterior and posterior margins of the segments and a narrow transverse black band in the eye of each segment. In some larvae, the median black band is much wider so that the larvae appear to exist black with narrow yellow lines. There is a transverse row of large branched spines (scoli) with orange or crimson bases on each body segment, Intestinal segments two through eight typically have a conspicuous white spot on each side and there is unremarkably a creamy white lateral line that runs most of the length of the body.

Figure 3. Larva of the American lady, Vanessa virginiensis (Drury). Some larvae are primarily yellowish with sparse blackness transverse lines on the inductive and posterior margins of the segments and a narrow transverse black band in the middle of each segment. Photograph by Don Hall, University of Florida

Figure 4. Larva of the American lady, Vanessa virginiensis (Drury). In some larvae, the median black band is much wider and then that the larvae announced to be blackness with narrow yellow lines. Photograph by Jerry Butler, University of Florida.

Pupae: Pupae are approximately 0.75 inches in length. They may be either dark-green with purple markings or gray with dark markings. They hang vertically, attached by the terminal end to a small-scale silk pad past the cremaster.

Figure 5. American lady, Vanessa virginiensis (Drury), larva attached to silk pad in typical pre-pupation "J" shape. Photograph by Don Hall, University of Florida.

Figure six. Light-green pupa of American lady, Vanessa virginiensis (Drury). Photograph by Don Hall, University of Florida.

Figure 7. Gray pupa of American lady, Vanessa virginiensis (Drury). Photo by Don Hall, Academy of Florida.

Figure viii. Pupa of American lady, Vanessa virginiensis (Drury), immediately before adult emergence. Photo by Don Hall, University of Florida.

Figure 9. Newly emerged adult American lady, Vanessa virginiensis (Drury), later joining halves of proboscis. Photograph past Don Hall, University of Florida.

Figure 10. Old pupal skin of a recently emerged adult American lady, Vanessa virginiensis (Drury). Photograph by Don Hall, University of Florida.

Life Bike and Biology (Back to Elevation)

There are multiple generations per twelvemonth in Florida, but they are most common in the spring. Adults and larvae are found in a multifariousness of habitats including uplands, sandhills, flatwoods, lawns, and weedy areas. Eggs are laid on the upper surface of leaves of the host plants. Larvae make nests at the tops of host plants by silking together leaves and crust at the tips of the bloom stalks where they hide during the daytime and come out at night and on clouded days to feed.

Figure 11. American lady, Vanessa virginiensis (Drury), larval nest on Pennsylvania everlasting, Gamochaeta pensylvanica (Willd.) Cabrera, also known equally Pennsylvania cudweed. Photograph by Don Hall, University of Florida.

Figure 12. American lady, Vanessa virginiensis (Drury), larval nest on Caribbean area purple everlasting, (Gamochaeta antillana (Urb.) Anderb., also known as delicate everlasting. Photograph by Don Hall, Academy of Florida.

Adults overwinter in the southern U.S. and repopulate more than northern areas each spring. The northern limit of overwintering is unknown. Walker (2001) reported that in n central Florida, American ladies drift northward during the spring, only there is no pregnant southward migration in the autumn.

Adults prefer floral nectar simply besides feed on sap, fermenting fruit, and mud (Allen 1997, Glassberg et al. 2000, Opler and Krizek 1984, Scott 1986).

Hosts (Back to Top)

Preferred establish hosts for larvae are "everlasting" or "cudweed" herbs and their close relatives in the asteraceae (Asteraceae). Mutual hosts in Florida are:

Pennsylvania everlasting, Gamochaeta pensylvanica (Willd.) Cabrera, too known as Pennsylvania cudweed

spoonleaf imperial everlasting, Gamochaeta purpurea (L.) Cabrera, also known as spoonleaf cudweed

Caribbean area purple everlasting, (Gamochaeta antillana (Urb.) Anderb., besides known as delicate everlasting

sweet everlasting, Pseudognaphalium obtusifolium (L.) Hilliard & B.Fifty.Burtt, also known as rabbit tobacco

These species were formerly placed in the genus Gnaphalium (Wunderlin and Hansen 2003). Gamochaeta antillana has long been misidentified equally Gamochaeta falcata (Lamarck) Cabrera, which is a Southward American species that does non occur in the Us (eFloras.org Undated_a). For identification keys and characteristics of the Gamochaeta everlastings, see Wunderlin and Hansen (2003) and eFloras.org (Undated_b).

Figure 13. Pennsylvania everlasting, Gamochaeta pensylvanica (Willd.) Cabrera, also known as Pennsylvania cudweed, is a host of the American lady, Vanessa virginiensis (Drury). Photograph by Don Hall, University of Florida.

Figure xiv. Spoonleaf purple everlasting, Gamochaeta purpurea (50.) Cabrera, also known as spoonleaf cudweed, is a host of the American lady, Vanessa virginiensis (Drury).Photograph past Don Hall, University of Florida.

Figure 15. Caribbean purple everlasting, (Gamochaeta antillana (Urb.) Anderb., also known equally frail everlasting, is a host of the American lady, Vanessa virginiensis (Drury). Photograph by Don Hall, University of Florida.

In more northern areas, pearly everlasting, Anaphalis margaritacea (Linnaeus) Bentham & Hooker, and pussytoes, Antennaria spp., are likewise commonly used as larval hosts (Opler and Krizek 1984, Scott 1986).

Selected References (Back to Pinnacle)

• Cech R, Tudor G. 2005. Butterflies of the East Coast: An Observer's Guide. Princeton University Press. Princeton, New Jersey. 345 pp.
• eFloras.org. (Undated_a). Gamochaeta antillana (Urban) Anderberg, Opera Bot. 104: 157. 1991. Flora of North America. (nine February 2018).
• eFloras.org. (Undated_b). Gamochaeta Weddell, Chlor. Andina. 1: 151. 1856. Flora of North America.
• Miller JY, ed. 1992. The Common Names of North American Butterflies. Smithsonian Institution Printing. Washington, D.C. 177 pp.
• Minno MC, Butler JF, Hall DW. 2005. Florida Butterfly Caterpillars and their Host Plants. University Printing of Florida. Gainesville, Florida. 341 pp.
• NABA. (2016) Edition ii.3. (http://naba.org/pubs/enames2_3.html) North American Butterfly Association.
• Opler PA, Krizek Become. 1984. Butterflies East of the Neat Plains. The Johns Hopkins University Press. Baltimore, Maryland. 294 pp.
• Scott JA. 1986. The Butterflies of North America: A Natural History and Field Guide. Stanford University Printing. Stanford, California. 583 pp.
• Walker TJ. 2001. Butterfly migrations in Florida: seasonal patterns and long-term changes. Environmental Entomology 30: 1052-1060.
• Wunderlin RP, Hansen BF. 2003. Guide to the Vascular Plants of Florida. 2nd ed. Academy Press of Florida. Gainesville, Florida. 787 pp.
• Wunderlin RP, Hansen BF, Franck AR, Essig FB. 2021. Atlas of Florida Plants (http://florida.plantatlas.usf.edu/). Plant for Systematic Botany. University of Southward Florida. Tampa, Florida

Source: https://entnemdept.ufl.edu/creatures/bfly/american_lady.htm

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