Dryas iuliaMargarita Beltrán and Andrew V. Z. Brower
A widely-distributed neotropical species, with geographically differentiated forms ranging from the southern U. S. throughout the Antilles and Central America to subtropical southern South America.
Etymology: Dryas ("oak") a son of Ares, and brother of Tereus, was one of the Calydonian hunters. He was murdered by his own brother, who had received an oracle, that his son Itys should fall by the hand of a relative (DRYAS). Julia is of latin origin, and its meaning is youthful. Feminine form of Julius (IULIA).
Early stages: Eggs are yellow and approximately 1.2 x 1 mm (h x w). Females place eggs singly in diverse parts of the host plant mostly on leaves, growing shoots, or even off the plant. Mature larvae have a brown body with red and white stripes and black and yellow scoli and a brown and white head; length is approximately 0.9 cm. Caterpillars can be gregarious in small numbers (Brown, 1981).
Dryas iulia fly rapidly in forest clearings and open areas. Females mate multiply, and adults roost at night in loose groups lower than 2 m above the ground (Brown, 1981).
Hostplant: D. iulia larvae feed primarily on plants from the genus Passiflora subgenus Astrophea and Polyanthea, Tryphostemmatoides and Plectostemma (Brown, 1981).
Brown K. S. 1981 The Biology of Heliconius and Related Genera. Annual Review of Entomology 26, 427-456.
Davies N, and Bermingham E. 2002. The historical biogeography of two Caribbean butterflies (Lepidoptera: Heliconiidae) as inferred from genetic variation at multiple loci. Evolution 56: 573-589.
DRYAS. Greek Myth Index. http://www.mythindex.com/greek-mythology/D/Dryas.html [Accessed 26 August 2008]
IULIA. Baby Name Box. http://www.babynamebox.com/latin-baby-names.html [Accessed 26 August 2008]
About This Page
University of Cambridge, Cambridge, UK
Middle Tennessee State University, Murfreesboro, Tennessee, USA
Correspondence regarding this page should be directed to Margarita Beltrán at and Andrew V. Z. Brower at
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- First online 21 February 2007
- Content changed 04 September 2008
Citing this page:
Beltrán, Margarita and Andrew V. Z. Brower. 2008. Dryas http://tolweb.org/Dryas_iulia/70435/2008.09.04 in The Tree of Life Web Project, http://tolweb.org/. Dryas iulia . Version 04 September 2008 (under construction).