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Overall color light gray blue to gray with obscure transverse forewing markings, sometimes showing slight brownish shadings over reniform spot and in postmedial and subterminal areas. Males and females similar in appearance; male antenna narrowly bipectinate in basal ¾, with dense setae on ventral surface. Female antenna filiform for entire length, with sparse setae. Apex of forewing marked with a diagonal white and dark shade. Forewing length in males 12–15 mm (mean = 14 mm, n = 72), and in females 13–16 mm (mean = 14 mm, n = 25). Male genitalia (Figs 11–13) distinguished by a helmet-shaped uncus with gradually widening sides. Female genitalia (Fig. 20) with membranous papilla anales partially hidden from view. Ductus bursae broad and short, dorso-ventrally compressed; corpus bursae, round in profile, with a single shark tooth-shaped signum, also with a heavily sclerotized, perpendicular, thumb-like projection ventrally and a sclerotized finger-like pocket appressed to corpus bursae dorsally. Deciduous cornuti from male vesica may be found in corpus bursae.
Morrison (1875) described Elasmia packardii from Waco, Bosque County, Texas (Fig. 2) based on a single female specimen (Fig. 1). Adults are on the wing from April through early October.
Distribution and Biology
Elasmia packardii occurs in Texas, Arizona, New Mexico, Oklahoma, and Kansas (Fig. 26); it is common at Carlsbad Caverns National Park. Its distribution in Mexico is unknown. The larvae feed on Ungnadia speciosa Endl. (Mexican buckeye) (R.O. Kendall specimens in TAM) and Sapindus saponaria var. drummondii (Hook. & Arn.) L. Benson (soapberry tree) (both Sapindaceae) (R.O. Kendall specimens in AMNH and TAM).
- Metzler, E; Knudson, E; 2011: A new species of Elasmia Möschler from New Mexico and Texas, and a new subspecies of Elasmia mandela (Druce) from Texas and Oklahoma (Lepidoptera, Notodontidae, Nystaleinae) ZooKeys, 149: 51-67. doi
- Morrison H (1875) Notes on North American Lepidoptera. Annals of the Lyceum of Natural History of New York 11: 91-104. doi: 10.1111/j.1749-6632.1876.tb00066.x